Home » Public Forums » GMCnet » Final Drive Coughing Up Gear Oil (Gear oil is coming out the vent.)
| Final Drive Coughing Up Gear Oil [message #343701] |
Sun, 26 May 2019 21:58  |
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JBO
Messages: 65
Registered: August 2012
Location: South Western Ontario
Karma: 0
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Member |
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Gentlemen,
Does anyone have any idea why all of a sudden, out of the blue my final drive is losing its gear oil out the vent? This is on my 68 Toronado and not the 78 Royale.
I started noticing a small puddle of fluid under the car and realized it was gear oil. I confirmed it was from the final drive. It is not over filled, I removed the plug and actually had to add more fluid. I topped it up and took the car back out for a run, came back home, looked underneath and the gear oil was coming out the vent.
I have been restoring this car for what seems like forever, I have gone through all the mechanicals including the final drive. There is perhaps 150 miles on the drive (and everything else) since it was overhauled, although it was probably done 7 years ago.
Thanks in advance, Jim
Jim Owens,
78 Royale,
Out skirts of Kitchener, Ontario
[Updated on: Sun, 26 May 2019 22:11] Report message to a moderator |
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| Re: Final Drive Coughing Up Gear Oil [message #343702 is a reply to message #343701] |
Sun, 26 May 2019 22:33  |
Scott Nutter
Messages: 782
Registered: January 2015
Location: Houston/San Diego
Karma: 4
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Senior Member |
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Jim,
If no one has any ideas on this. I would suggest taking it to Frank Borrmann. Great Gmc mech. He is about 60km north of you.
519-335-6257. His shop is in Bluevale
Scott.
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI
Houston, Texas
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| Re: [GMCnet] Final Drive Coughing Up Gear Oil [message #343703 is a reply to message #343701] |
Sun, 26 May 2019 22:30 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Perhaps the wrong gasket was used on the cover. It is a complex, 2 piece
gasket with a labyrinth that allows air past but not fluids. It works in
concert with the output flange seal on the drivers side of the final drive
case. If either one is not correct, it will leak as you have described.
Jim Hupy
Salem, Or
On Sun, May 26, 2019, 8:22 PM Jim via Gmclist
wrote:
> Gentlemen,
>
> Does anyone have any idea why all of a sudden, out of the blue my final
> drive is losing its gear oil out the vent? This is on my 68 Toronado and not
> the 78 Royale.
>
> I started noticing a small puddle of fluid under the car and realized it
> was gear oil. I confirmed it was from the final drive. It is not over
> filled,
> I removed the plug and actually had to add more fluid. I topped it up and
> took the car back out for a run, came back home, looked underneath and the
> gear oil was coming out the vent.
>
> I have been restoring this car for what seems like forever, I have gone
> through all the mechanicals including the final drive. There is perhaps 150
> miles on the drive (and everything else) since it was overhauled, although
> it was probably done 7 years ago.
>
> Thanks in advance, Jim
>
>
> --
> Jim Owens,
>
> 78 Royale,
>
> Out skirts of Kitchener, Ontario
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
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| Re: Final Drive Coughing Up Gear Oil [message #343717 is a reply to message #343701] |
Mon, 27 May 2019 10:40 |
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JBO
Messages: 65
Registered: August 2012
Location: South Western Ontario
Karma: 0
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Member |
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Scott,
I know Frank well, great guy. I talked with him extensively before I bought our Royale as he had helped the PO install a Dick Paterson 455 in the 78.
What was kinda interesting was; my wife and I met Frank a couple times either at his shop or at a Heritage Cruiser Rally. One day at a Rally, Frank was talking about his time growing up in Waterloo. Ontario. Then it hit me...I know this guy!
We semi hung out together through a mutual friend when these coaches were being sold brand new way back when we were 14 & 15 in the mid 70's!
So Frank is always an option.
Jim,
Thanks for the reply, I installed a Ragusa cover on the coach's final drive. It was so uneventful I can't even recall doing it. Weird that the gasket cover may be the culprit, how many different ones could there be? It's definitely a mystery.
Here's a picture of the 68.
I bought the 68 in 2005, I should of sold it in 2009. Unfortunately I decided I really liked the car and you just don't see them around anymore.
So I decided to give it a full blown restoration. Bad move from a $$$ perspective as once I was knee-deep and had the car ripped into a million pieces I kept coming across web sites in my parts searches that claimed parts are similar to the GMC Motorhome.
Next thing you know, we have the Royale and going on 9 years later on the 68 restoration it's almost done. $$$ flying out into both vehicles now....
http://www.gmcmhphotos.com/photos/u42782-jbo78.html
Jim Owens,
78 Royale,
Out skirts of Kitchener, Ontario
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| Re: [GMCnet] Final Drive Coughing Up Gear Oil [message #343720 is a reply to message #343717] |
Mon, 27 May 2019 11:54 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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There are several versions of that gasket. There originally was a very
thick sandwich type gasket that had an internal labyrinth. It terminates at
the top where the 1/8" hole in the steel cover is. There is a steel piece
that fits under the head of the topmost screw, that shields the 1/8" hole
from debris. It also makes it hard to see that hole.
The only available gasket with a labyrinth included available today
consists of two gaskets stapled together. The part with the labyrinth cut
out goes towards the steel cover. I use high tack gasket adhesive in the
spray cans when I change those gaskets. I spray the cover, and the gasket,
let it tack up, then spray them again and stick the gasket to the cover. Be
absolutely certain that the 1/8" hole aligns with the labyrinth. If it does
not, twirl an 1/8" drill bit between your thumb and forefinger after the
cover is in place to open the vent. If you choose to use silicone, don't
plug the vent hole. The final drive will leak if you do. SOME GMCers have
gone so far as to drill the final drive case, tapped the hole, installed a
pipe elbow and clear tubing that terminates in a plastic bottle for a vent
system. Bunch of work in my opinion, but to each his own, I guess.
Jim Hupy
On Mon, May 27, 2019, 8:41 AM Jim via Gmclist
wrote:
> Scott,
>
> I know Frank well, great guy. I talked with him extensively before I
> bought our Royale as he had helped the PO install a Dick Paterson 455 in
> the 78.
>
>
> What was kinda interesting was; my wife and I met Frank a couple times
> either at his shop or at a Heritage Cruiser Rally. One day at a Rally, Frank
> was talking about his time growing up in Waterloo. Ontario. Then it hit
> me...I know this guy!
>
> We semi hung out together through a mutual friend when these coaches were
> being sold brand new way back when we were 14 & 15 in the mid 70's!
>
> So Frank is always an option.
>
> Jim,
>
> Thanks for the reply, I installed a Ragusa cover on the coach's final
> drive. It was so uneventful I can't even recall doing it. Weird that the
> gasket
> cover may be the culprit, how many different ones could there be? It's
> definitely a mystery.
>
> Here's a picture of the 68.
>
> I bought the 68 in 2005, I should of sold it in 2009. Unfortunately I
> decided I really liked the car and you just don't see them around anymore.
> So I decided to give it a full blown restoration. Bad move from a $$$
> perspective as once I was knee-deep and had the car ripped into a million
> pieces
> I kept coming across web sites in my parts searches that claimed parts are
> similar to the GMC Motorhome.
>
> Next thing you know, we have the Royale and going on 9 years later on the
> 68 restoration it's almost done. $$$ flying out into both vehicles now....
>
> http://www.gmcmhphotos.com/photos/u42782-jbo78.html
>
> --
> Jim Owens,
>
> 78 Royale,
>
> Out skirts of Kitchener, Ontario
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
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Unsubscribe or Change List Options:
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| Re: [GMCnet] Final Drive Coughing Up Gear Oil [message #343724 is a reply to message #343717] |
Mon, 27 May 2019 13:27 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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If nothing was done to the unit, then I suspect the Pinion seal leaking
trans fluid might be leaking into the final drive.
On Mon, May 27, 2019 at 8:41 AM Jim via Gmclist
wrote:
> Scott,
>
> I know Frank well, great guy. I talked with him extensively before I
> bought our Royale as he had helped the PO install a Dick Paterson 455 in
> the 78.
>
>
> What was kinda interesting was; my wife and I met Frank a couple times
> either at his shop or at a Heritage Cruiser Rally. One day at a Rally, Frank
> was talking about his time growing up in Waterloo. Ontario. Then it hit
> me...I know this guy!
>
> We semi hung out together through a mutual friend when these coaches were
> being sold brand new way back when we were 14 & 15 in the mid 70's!
>
> So Frank is always an option.
>
> Jim,
>
> Thanks for the reply, I installed a Ragusa cover on the coach's final
> drive. It was so uneventful I can't even recall doing it. Weird that the
> gasket
> cover may be the culprit, how many different ones could there be? It's
> definitely a mystery.
>
> Here's a picture of the 68.
>
> I bought the 68 in 2005, I should of sold it in 2009. Unfortunately I
> decided I really liked the car and you just don't see them around anymore.
> So I decided to give it a full blown restoration. Bad move from a $$$
> perspective as once I was knee-deep and had the car ripped into a million
> pieces
> I kept coming across web sites in my parts searches that claimed parts are
> similar to the GMC Motorhome.
>
> Next thing you know, we have the Royale and going on 9 years later on the
> 68 restoration it's almost done. $$$ flying out into both vehicles now....
>
> http://www.gmcmhphotos.com/photos/u42782-jbo78.html
>
> --
> Jim Owens,
>
> 78 Royale,
>
> Out skirts of Kitchener, Ontario
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
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Unsubscribe or Change List Options:
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Final Drive Coughing Up Gear Oil [message #343732 is a reply to message #343731] |
Mon, 27 May 2019 19:37 |
Will Albers
Messages: 183
Registered: November 2017
Location: Detroit MI (Belleville)
Karma: 2
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Senior Member |
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I'm about to install one. Is there a better set of gaskets to use to avoid
a similar situation?
On Mon, May 27, 2019 at 8:10 PM Jim via Gmclist
wrote:
> The complete final drive unit was overhauled, along with transmission,
> engine, a disc brake conversion and pretty much anything else you can think
> of....not to mention the countless hours stripping the whole thing down to
> bare metal, blocking and sanding primer till the cows came home and then
> refinishing in base clear and of course blocking and polishing clear till
> the cows left and came back home again!
>
> So many hours in the garage...and then I bought a GMC...I'm surprised I
> can find the time to go to work. It's like a full time job working on these
> toys.
>
>
>
> Definitely is not leaking trans fluid into the unit as I had to add gear
> oil to bring the fluid level back up, plus the leaking gear oil appears to
> be
> 100% uncontaminated pure without any extra trans fluid in the mix.
>
> Jim Hupy appears to have a very plausible explanation although why
> wouldn't it leak from moment one? Why start after a couple hundred miles
> and not
> just leak right away?
>
> Only reason I can think of is; the restoration was seeing light at the end
> of the tunnel only a handful of small gremlins to address...and no. Back to
> the garage and throw some more time and money at it.....
>
>
>
>
> --
> Jim Owens,
>
> 78 Royale,
>
> Out skirts of Kitchener, Ontario
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
1978 Palm Beach.
Detroit Michigan
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| Re: [GMCnet] Final Drive Coughing Up Gear Oil [message #343733 is a reply to message #343731] |
Mon, 27 May 2019 19:50 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Because it needs to get hot enough to pressurize the gear case from heat
expansion. Short trips won't do it. But 40 or 50 miles at freeway speed
should.
Jim Hupy
On Mon, May 27, 2019, 5:10 PM Jim via Gmclist
wrote:
> The complete final drive unit was overhauled, along with transmission,
> engine, a disc brake conversion and pretty much anything else you can think
> of....not to mention the countless hours stripping the whole thing down to
> bare metal, blocking and sanding primer till the cows came home and then
> refinishing in base clear and of course blocking and polishing clear till
> the cows left and came back home again!
>
> So many hours in the garage...and then I bought a GMC...I'm surprised I
> can find the time to go to work. It's like a full time job working on these
> toys.
>
>
>
> Definitely is not leaking trans fluid into the unit as I had to add gear
> oil to bring the fluid level back up, plus the leaking gear oil appears to
> be
> 100% uncontaminated pure without any extra trans fluid in the mix.
>
> Jim Hupy appears to have a very plausible explanation although why
> wouldn't it leak from moment one? Why start after a couple hundred miles
> and not
> just leak right away?
>
> Only reason I can think of is; the restoration was seeing light at the end
> of the tunnel only a handful of small gremlins to address...and no. Back to
> the garage and throw some more time and money at it.....
>
>
>
>
> --
> Jim Owens,
>
> 78 Royale,
>
> Out skirts of Kitchener, Ontario
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] Final Drive Coughing Up Gear Oil [message #343739 is a reply to message #343732] |
Mon, 27 May 2019 22:29 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Will,
If you use the wrong cover with the fill hole located higher, your going to
end up overfiling it without knowing.
I have supplied over 3 thousand of these and ran into lot of issues , so I
say listen to me and don't think you did all thing right.
There have been incorrect gaskets made of two parts. If you have one, put
it on the pan and see if the vent path is correct. If not sure take a pic
and send it to my cell (408) 639-0737. Be sure to put your name with it.
On Mon, May 27, 2019 at 5:38 PM Will via Gmclist
wrote:
> I'm about to install one. Is there a better set of gaskets to use to avoid
> a similar situation?
>
> On Mon, May 27, 2019 at 8:10 PM Jim via Gmclist
> wrote:
>
>> The complete final drive unit was overhauled, along with transmission,
>> engine, a disc brake conversion and pretty much anything else you can
> think
>> of....not to mention the countless hours stripping the whole thing down
> to
>> bare metal, blocking and sanding primer till the cows came home and then
>> refinishing in base clear and of course blocking and polishing clear till
>> the cows left and came back home again!
>>
>> So many hours in the garage...and then I bought a GMC...I'm surprised I
>> can find the time to go to work. It's like a full time job working on
> these
>> toys.
>>
>>
>>
>> Definitely is not leaking trans fluid into the unit as I had to add gear
>> oil to bring the fluid level back up, plus the leaking gear oil appears
> to
>> be
>> 100% uncontaminated pure without any extra trans fluid in the mix.
>>
>> Jim Hupy appears to have a very plausible explanation although why
>> wouldn't it leak from moment one? Why start after a couple hundred miles
>> and not
>> just leak right away?
>>
>> Only reason I can think of is; the restoration was seeing light at the
> end
>> of the tunnel only a handful of small gremlins to address...and no. Back
> to
>> the garage and throw some more time and money at it.....
>>
>>
>>
>>
>> --
>> Jim Owens,
>>
>> 78 Royale,
>>
>> Out skirts of Kitchener, Ontario
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Final Drive Coughing Up Gear Oil [message #343753 is a reply to message #343739] |
Tue, 28 May 2019 12:17 |
Will Albers
Messages: 183
Registered: November 2017
Location: Detroit MI (Belleville)
Karma: 2
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Senior Member |
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Thanks Jim - Will do
On Tue, May 28, 2019 at 12:18 AM Jim Kanomata via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Will,
> If you use the wrong cover with the fill hole located higher, your going to
> end up overfiling it without knowing.
> I have supplied over 3 thousand of these and ran into lot of issues , so I
> say listen to me and don't think you did all thing right.
> There have been incorrect gaskets made of two parts. If you have one, put
> it on the pan and see if the vent path is correct. If not sure take a pic
> and send it to my cell (408) 639-0737. Be sure to put your name with it.
>
> On Mon, May 27, 2019 at 5:38 PM Will via Gmclist
> wrote:
>
>> I'm about to install one. Is there a better set of gaskets to use to
> avoid
>> a similar situation?
>>
>> On Mon, May 27, 2019 at 8:10 PM Jim via Gmclist >
>> wrote:
>>
>>> The complete final drive unit was overhauled, along with transmission,
>>> engine, a disc brake conversion and pretty much anything else you can
>> think
>>> of....not to mention the countless hours stripping the whole thing down
>> to
>>> bare metal, blocking and sanding primer till the cows came home and
> then
>>> refinishing in base clear and of course blocking and polishing clear
> till
>>> the cows left and came back home again!
>>>
>>> So many hours in the garage...and then I bought a GMC...I'm surprised I
>>> can find the time to go to work. It's like a full time job working on
>> these
>>> toys.
>>>
>>>
>>>
>>> Definitely is not leaking trans fluid into the unit as I had to add
> gear
>>> oil to bring the fluid level back up, plus the leaking gear oil appears
>> to
>>> be
>>> 100% uncontaminated pure without any extra trans fluid in the mix.
>>>
>>> Jim Hupy appears to have a very plausible explanation although why
>>> wouldn't it leak from moment one? Why start after a couple hundred
> miles
>>> and not
>>> just leak right away?
>>>
>>> Only reason I can think of is; the restoration was seeing light at the
>> end
>>> of the tunnel only a handful of small gremlins to address...and no.
> Back
>> to
>>> the garage and throw some more time and money at it.....
>>>
>>>
>>>
>>>
>>> --
>>> Jim Owens,
>>>
>>> 78 Royale,
>>>
>>> Out skirts of Kitchener, Ontario
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
1978 Palm Beach.
Detroit Michigan
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| Re: [GMCnet] Final Drive Coughing Up Gear Oil [message #343766 is a reply to message #343753] |
Tue, 28 May 2019 16:54 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Like I suspected, the cover was a wrong one that had the oil fill hole
about a inch higher , causing more grease to be filled.
On Tue, May 28, 2019 at 2:37 PM Will via Gmclist
wrote:
> Thanks Jim - Will do
>
> On Tue, May 28, 2019 at 12:18 AM Jim Kanomata via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> Will,
>> If you use the wrong cover with the fill hole located higher, your going
> to
>> end up overfiling it without knowing.
>> I have supplied over 3 thousand of these and ran into lot of issues , so
> I
>> say listen to me and don't think you did all thing right.
>> There have been incorrect gaskets made of two parts. If you have one, put
>> it on the pan and see if the vent path is correct. If not sure take a pic
>> and send it to my cell (408) 639-0737. Be sure to put your name with it.
>>
>> On Mon, May 27, 2019 at 5:38 PM Will via Gmclist gmclist@list.gmcnet.org>
>> wrote:
>>
>>> I'm about to install one. Is there a better set of gaskets to use to
>> avoid
>>> a similar situation?
>>>
>>> On Mon, May 27, 2019 at 8:10 PM Jim via Gmclist gmclist@list.gmcnet.org
>>>
>>> wrote:
>>>
>>>> The complete final drive unit was overhauled, along with
> transmission,
>>>> engine, a disc brake conversion and pretty much anything else you can
>>> think
>>>> of....not to mention the countless hours stripping the whole thing
> down
>>> to
>>>> bare metal, blocking and sanding primer till the cows came home and
>> then
>>>> refinishing in base clear and of course blocking and polishing clear
>> till
>>>> the cows left and came back home again!
>>>>
>>>> So many hours in the garage...and then I bought a GMC...I'm
> surprised I
>>>> can find the time to go to work. It's like a full time job working on
>>> these
>>>> toys.
>>>>
>>>>
>>>>
>>>> Definitely is not leaking trans fluid into the unit as I had to add
>> gear
>>>> oil to bring the fluid level back up, plus the leaking gear oil
> appears
>>> to
>>>> be
>>>> 100% uncontaminated pure without any extra trans fluid in the mix.
>>>>
>>>> Jim Hupy appears to have a very plausible explanation although why
>>>> wouldn't it leak from moment one? Why start after a couple hundred
>> miles
>>>> and not
>>>> just leak right away?
>>>>
>>>> Only reason I can think of is; the restoration was seeing light at
> the
>>> end
>>>> of the tunnel only a handful of small gremlins to address...and no.
>> Back
>>> to
>>>> the garage and throw some more time and money at it.....
>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Jim Owens,
>>>>
>>>> 78 Royale,
>>>>
>>>> Out skirts of Kitchener, Ontario
>>>>
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> Unsubscribe or Change List Options:
>>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>
>>
>> --
>> Jim Kanomata
>> Applied/GMC, Newark,CA
>> jimk@appliedairfilters.com
>> http://www.appliedgmc.com
>> 1-800-752-7502
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Final Drive Coughing Up Gear Oil [message #343767 is a reply to message #343766] |
Tue, 28 May 2019 17:21 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Beside the vent on the cover, there is a vent on the left side seal that
has a baffle with two small vent holes.
This is an OEM seal and not sold at parts stores.
Also the pinion seals, two thin seals that are mounted back to back.
On Tue, May 28, 2019 at 2:54 PM Jim Kanomata wrote:
> Like I suspected, the cover was a wrong one that had the oil fill hole
> about a inch higher , causing more grease to be filled.
>
>
> On Tue, May 28, 2019 at 2:37 PM Will via Gmclist
> wrote:
>
>> Thanks Jim - Will do
>>
>> On Tue, May 28, 2019 at 12:18 AM Jim Kanomata via Gmclist > gmclist@list.gmcnet.org> wrote:
>>
>>> Will,
>>> If you use the wrong cover with the fill hole located higher, your
>> going to
>>> end up overfiling it without knowing.
>>> I have supplied over 3 thousand of these and ran into lot of issues ,
>> so I
>>> say listen to me and don't think you did all thing right.
>>> There have been incorrect gaskets made of two parts. If you have one,
>> put
>>> it on the pan and see if the vent path is correct. If not sure take a
>> pic
>>> and send it to my cell (408) 639-0737. Be sure to put your name with it.
>>>
>>> On Mon, May 27, 2019 at 5:38 PM Will via Gmclist > gmclist@list.gmcnet.org>
>>> wrote:
>>>
>>>> I'm about to install one. Is there a better set of gaskets to use to
>>> avoid
>>>> a similar situation?
>>>>
>>>> On Mon, May 27, 2019 at 8:10 PM Jim via Gmclist > gmclist@list.gmcnet.org
>>>>
>>>> wrote:
>>>>
>>>> > The complete final drive unit was overhauled, along with
>> transmission,
>>>> > engine, a disc brake conversion and pretty much anything else you
>> can
>>>> think
>>>> > of....not to mention the countless hours stripping the whole thing
>> down
>>>> to
>>>> > bare metal, blocking and sanding primer till the cows came home and
>>> then
>>>> > refinishing in base clear and of course blocking and polishing clear
>>> till
>>>> > the cows left and came back home again!
>>>> >
>>>> > So many hours in the garage...and then I bought a GMC...I'm
>> surprised I
>>>> > can find the time to go to work. It's like a full time job working
>> on
>>>> these
>>>> > toys.
>>>> >
>>>> >
>>>> >
>>>> > Definitely is not leaking trans fluid into the unit as I had to add
>>> gear
>>>> > oil to bring the fluid level back up, plus the leaking gear oil
>> appears
>>>> to
>>>> > be
>>>> > 100% uncontaminated pure without any extra trans fluid in the mix.
>>>> >
>>>> > Jim Hupy appears to have a very plausible explanation although why
>>>> > wouldn't it leak from moment one? Why start after a couple hundred
>>> miles
>>>> > and not
>>>> > just leak right away?
>>>> >
>>>> > Only reason I can think of is; the restoration was seeing light at
>> the
>>>> end
>>>> > of the tunnel only a handful of small gremlins to address...and no.
>>> Back
>>>> to
>>>> > the garage and throw some more time and money at it.....
>>>> >
>>>> >
>>>> >
>>>> >
>>>> > --
>>>> > Jim Owens,
>>>> >
>>>> > 78 Royale,
>>>> >
>>>> > Out skirts of Kitchener, Ontario
>>>> >
>>>> > _______________________________________________
>>>> > GMCnet mailing list
>>>> > Unsubscribe or Change List Options:
>>>> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>> >
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> Unsubscribe or Change List Options:
>>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>>
>>>
>>>
>>> --
>>> Jim Kanomata
>>> Applied/GMC, Newark,CA
>>> jimk@appliedairfilters.com
>>> http://www.appliedgmc.com
>>> 1-800-752-7502
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Final Drive Coughing Up Gear Oil [message #344221 is a reply to message #344219] |
Sat, 15 June 2019 18:35 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
|
Senior Member |
|
|
That vent tube is not factory. When installed, if it is subject to oil
sign-off from the ring gear, and is not routed up towards the hatch cover
before it points down, it will leak. Sounds like a fix that didn't.
Jim Hupy
Salem,Oregon
78 GMC ROYALE 403
On Sat, Jun 15, 2019, 4:22 PM Jim via Gmclist
wrote:
> Finally found the time to remove the final drive cover and see what's
> going on.
>
> There was not a gasket only silicone on the flange area of the final drive
> cover
>
> This had me feeling assured this was the problem with the fluid exiting
> the vent hole.
>
> http://www.gmcmhphotos.com/photos/member-galleries/p66464-img-4285.html
>
>
> I then removed the gasket from the package, placed it on the cover and
> then realized that there wasn't a small hole in the flange area at all.
>
> http://www.gmcmhphotos.com/photos/member-galleries/p66466-img-4291.html
>
> http://www.gmcmhphotos.com/photos/member-galleries/p66465-img-4290.html
>
>
> I went oh-oh, I don't believe it matter that this cover was sealed with a
> ribbon of silicone after all as the air vents out the long vent tube which
> does not exit through the flange area but is more in the central are of
> the cover.
>
> Now I'm very concerned that perhaps the other seals may have been
> incorrectly installed and they are not venting built up pressure as they
> should.
> This in turn is causing pressure to build and the gear oil to puke out the
> vent.
>
> If this is the scenario, what are my options to rectify it?
>
> Do I need to remove the final drive, have it torn apart and have the seals
> installed correctly?
>
> Is there any other way I can devise away to vent out the final drive of
> pressure so it does not push out the fluid?
>
> Thanks in advance, Jim
>
>
>
>
> --
> Jim Owens,
>
> 78 Royale,
>
> Out skirts of Kitchener, Ontario
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] Final Drive Coughing Up Gear Oil [message #344222 is a reply to message #343703] |
Sat, 15 June 2019 18:36 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
|
Senior Member |
|
|
OIL SLING-OFF. Darn spell check.
Jim Hupy
On Sat, Jun 15, 2019, 4:35 PM James Hupy wrote:
> That vent tube is not factory. When installed, if it is subject to oil
> sign-off from the ring gear, and is not routed up towards the hatch cover
> before it points down, it will leak. Sounds like a fix that didn't.
> Jim Hupy
> Salem,Oregon
> 78 GMC ROYALE 403
>
> On Sat, Jun 15, 2019, 4:22 PM Jim via Gmclist
> wrote:
>
>> Finally found the time to remove the final drive cover and see what's
>> going on.
>>
>> There was not a gasket only silicone on the flange area of the final
>> drive cover
>>
>> This had me feeling assured this was the problem with the fluid exiting
>> the vent hole.
>>
>> http://www.gmcmhphotos.com/photos/member-galleries/p66464-img-4285.html
>>
>>
>> I then removed the gasket from the package, placed it on the cover and
>> then realized that there wasn't a small hole in the flange area at all.
>>
>> http://www.gmcmhphotos.com/photos/member-galleries/p66466-img-4291.html
>>
>> http://www.gmcmhphotos.com/photos/member-galleries/p66465-img-4290.html
>>
>>
>> I went oh-oh, I don't believe it matter that this cover was sealed with a
>> ribbon of silicone after all as the air vents out the long vent tube which
>> does not exit through the flange area but is more in the central are of
>> the cover.
>>
>> Now I'm very concerned that perhaps the other seals may have been
>> incorrectly installed and they are not venting built up pressure as they
>> should.
>> This in turn is causing pressure to build and the gear oil to puke out
>> the vent.
>>
>> If this is the scenario, what are my options to rectify it?
>>
>> Do I need to remove the final drive, have it torn apart and have the
>> seals installed correctly?
>>
>> Is there any other way I can devise away to vent out the final drive of
>> pressure so it does not push out the fluid?
>>
>> Thanks in advance, Jim
>>
>>
>>
>>
>> --
>> Jim Owens,
>>
>> 78 Royale,
>>
>> Out skirts of Kitchener, Ontario
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
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| Re: [GMCnet] Final Drive Coughing Up Gear Oil [message #344229 is a reply to message #344221] |
Sat, 15 June 2019 22:45 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
We are the most experienced in ten bolt cover final drive.
If you lack knowledge on the priciples of venting the unit your wasting
your time.
Why not confer with me and I will advise you.
You can aquire parts from others as I'm not after your funds, just want to
show you what I know and the free time to do so.
On Sat, Jun 15, 2019 at 8:26 PM James Hupy via Gmclist <
gmclist@list.gmcnet.org> wrote:
> That vent tube is not factory. When installed, if it is subject to oil
> sign-off from the ring gear, and is not routed up towards the hatch cover
> before it points down, it will leak. Sounds like a fix that didn't.
> Jim Hupy
> Salem,Oregon
> 78 GMC ROYALE 403
>
> On Sat, Jun 15, 2019, 4:22 PM Jim via Gmclist
> wrote:
>
>> Finally found the time to remove the final drive cover and see what's
>> going on.
>>
>> There was not a gasket only silicone on the flange area of the final
> drive
>> cover
>>
>> This had me feeling assured this was the problem with the fluid exiting
>> the vent hole.
>>
>> http://www.gmcmhphotos.com/photos/member-galleries/p66464-img-4285.html
>>
>>
>> I then removed the gasket from the package, placed it on the cover and
>> then realized that there wasn't a small hole in the flange area at all.
>>
>> http://www.gmcmhphotos.com/photos/member-galleries/p66466-img-4291.html
>>
>> http://www.gmcmhphotos.com/photos/member-galleries/p66465-img-4290.html
>>
>>
>> I went oh-oh, I don't believe it matter that this cover was sealed with a
>> ribbon of silicone after all as the air vents out the long vent tube
> which
>> does not exit through the flange area but is more in the central are of
>> the cover.
>>
>> Now I'm very concerned that perhaps the other seals may have been
>> incorrectly installed and they are not venting built up pressure as they
>> should.
>> This in turn is causing pressure to build and the gear oil to puke out
> the
>> vent.
>>
>> If this is the scenario, what are my options to rectify it?
>>
>> Do I need to remove the final drive, have it torn apart and have the
> seals
>> installed correctly?
>>
>> Is there any other way I can devise away to vent out the final drive of
>> pressure so it does not push out the fluid?
>>
>> Thanks in advance, Jim
>>
>>
>>
>>
>> --
>> Jim Owens,
>>
>> 78 Royale,
>>
>> Out skirts of Kitchener, Ontario
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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