Home » Public Forums » GMCnet » Transmission Leak
| Re: [GMCnet] Transmission Leak [message #326408 is a reply to message #326402] |
Mon, 27 November 2017 17:45   |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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My leaks continue also. Yesterday I tried George Z.'s suggestion to put
O-rings on the suspect bolts. Before I even got them torqued, the O-rings
could be squeezing out, so I abandoned that -- I wasn't convinced that ATF
was coming out of my all-deadheaded bolt holes.
At the rear of the pan, where all my leakage occurs, the pan gasket was
1/16"-1/8" beyond the pan flange, extending all the way to the vertical
surface where the chain cover seats. In an effort to determine whether the
leaks are coming from the transmission pan or the chain cover, I trimmed
that gasket back to the pan flange. Today I checked the results -- the ATF
is almost certainly coming over the top of the pan gasket -- where I didn't
use any sealant. I'll continue to keep the drip pan below the transmission
until the next ATF change. Then, I'll probably seal both sides of the
gasket -- as much as I hate the thought of having to clean the transmission
flange in the future. With my drain plug and external filter, if that
solves the leak, then in recognition of my age, I'll probably never change
it again -- just hoping I get a chance to seal both sides. :-)
Ken H.
On Mon, Nov 27, 2017 at 11:58 AM, roy keen wrote:
> On my transmission some were thru bolt holes and some were not. The thru
> ones needed a flange bolt and gasket or sealent so they wouldn't weep fluid.
> --
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www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Transmission Leak [message #326410 is a reply to message #326408] |
Mon, 27 November 2017 19:06 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Ken,
Your still young, so plan on doing more, OK.
I prefer to drop the pan as I can observe the residue at the bottom of the
pan and look at it with bright light for meal particles.
On Mon, Nov 27, 2017 at 3:45 PM, Ken Henderson
wrote:
> My leaks continue also. Yesterday I tried George Z.'s suggestion to put
> O-rings on the suspect bolts. Before I even got them torqued, the O-rings
> could be squeezing out, so I abandoned that -- I wasn't convinced that ATF
> was coming out of my all-deadheaded bolt holes.
>
> At the rear of the pan, where all my leakage occurs, the pan gasket was
> 1/16"-1/8" beyond the pan flange, extending all the way to the vertical
> surface where the chain cover seats. In an effort to determine whether the
> leaks are coming from the transmission pan or the chain cover, I trimmed
> that gasket back to the pan flange. Today I checked the results -- the ATF
> is almost certainly coming over the top of the pan gasket -- where I didn't
> use any sealant. I'll continue to keep the drip pan below the transmission
> until the next ATF change. Then, I'll probably seal both sides of the
> gasket -- as much as I hate the thought of having to clean the transmission
> flange in the future. With my drain plug and external filter, if that
> solves the leak, then in recognition of my age, I'll probably never change
> it again -- just hoping I get a chance to seal both sides. :-)
>
> Ken H.
>
> On Mon, Nov 27, 2017 at 11:58 AM, roy keen wrote:
>
>> On my transmission some were thru bolt holes and some were not. The thru
>> ones needed a flange bolt and gasket or sealent so they wouldn't weep
> fluid.
>> --
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Transmission Leak [message #326412 is a reply to message #326410] |
Mon, 27 November 2017 19:48 |
Kingsley Coach
Messages: 2691
Registered: March 2009
Location: Nova Scotia Canada
Karma: -34
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Senior Member |
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The next time you have the pan off, weld in a drain plug. Easier and
cheaper than an aluminum pan !
Mike from NS
On Mon, Nov 27, 2017 at 9:06 PM, Jim Kanomata wrote:
> Ken,
> Your still young, so plan on doing more, OK.
> I prefer to drop the pan as I can observe the residue at the bottom of the
> pan and look at it with bright light for meal particles.
>
> On Mon, Nov 27, 2017 at 3:45 PM, Ken Henderson
> wrote:
>
>> My leaks continue also. Yesterday I tried George Z.'s suggestion to put
>> O-rings on the suspect bolts. Before I even got them torqued, the
> O-rings
>> could be squeezing out, so I abandoned that -- I wasn't convinced that
> ATF
>> was coming out of my all-deadheaded bolt holes.
>>
>> At the rear of the pan, where all my leakage occurs, the pan gasket was
>> 1/16"-1/8" beyond the pan flange, extending all the way to the vertical
>> surface where the chain cover seats. In an effort to determine whether
> the
>> leaks are coming from the transmission pan or the chain cover, I trimmed
>> that gasket back to the pan flange. Today I checked the results -- the
> ATF
>> is almost certainly coming over the top of the pan gasket -- where I
> didn't
>> use any sealant. I'll continue to keep the drip pan below the
> transmission
>> until the next ATF change. Then, I'll probably seal both sides of the
>> gasket -- as much as I hate the thought of having to clean the
> transmission
>> flange in the future. With my drain plug and external filter, if that
>> solves the leak, then in recognition of my age, I'll probably never
> change
>> it again -- just hoping I get a chance to seal both sides. :-)
>>
>> Ken H.
>>
>> On Mon, Nov 27, 2017 at 11:58 AM, roy keen
> wrote:
>>
>>> On my transmission some were thru bolt holes and some were not. The
> thru
>>> ones needed a flange bolt and gasket or sealent so they wouldn't weep
>> fluid.
>>> --
>> _______________________________________________
>> 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:
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>
--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS
Life is too short to hold a grudge; slash some tires and call it even !
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| Re: [GMCnet] Transmission Leak [message #326415 is a reply to message #326412] |
Mon, 27 November 2017 20:28 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Mike,
I've had drain plugs (and temperature sender bungs) in all of my TH425 pans
for many years; it's an aluminum pan (with a plug) that's giving me fits
now..
Ken H.
On Mon, Nov 27, 2017 at 8:48 PM, Kingsley Coach
wrote:
> The next time you have the pan off, weld in a drain plug. Easier and
> cheaper than an aluminum pan !
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Transmission Leak [message #326416 is a reply to message #326408] |
Mon, 27 November 2017 20:36 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Ken,
Try:
https://www.amazon.com/Earls-178003ERL-Stat-Seal-Ring/dp/B0049D7XB8
Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Ken Henderson
Sent: Monday, November 27, 2017 5:46 PM
To: GMC Mail List
Subject: Re: [GMCnet] Transmission Leak
My leaks continue also. Yesterday I tried George Z.'s suggestion to put
O-rings on the suspect bolts. Before I even got them torqued, the O-rings
could be squeezing out, so I abandoned that -- I wasn't convinced that ATF
was coming out of my all-deadheaded bolt holes.
At the rear of the pan, where all my leakage occurs, the pan gasket was
1/16"-1/8" beyond the pan flange, extending all the way to the vertical
surface where the chain cover seats. In an effort to determine whether the
leaks are coming from the transmission pan or the chain cover, I trimmed
that gasket back to the pan flange. Today I checked the results -- the ATF
is almost certainly coming over the top of the pan gasket -- where I didn't
use any sealant. I'll continue to keep the drip pan below the transmission
until the next ATF change. Then, I'll probably seal both sides of the
gasket -- as much as I hate the thought of having to clean the transmission
flange in the future. With my drain plug and external filter, if that
solves the leak, then in recognition of my age, I'll probably never change
it again -- just hoping I get a chance to seal both sides. :-)
Ken H.
On Mon, Nov 27, 2017 at 11:58 AM, roy keen wrote:
> On my transmission some were thru bolt holes and some were not. The thru
> ones needed a flange bolt and gasket or sealent so they wouldn't weep fluid.
> --
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Transmission Leak [message #326421 is a reply to message #326416] |
Mon, 27 November 2017 21:49 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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I don't care what people say, the cast Aluminum trans pan with the internal
and external fins do work very well. People have reported noticeable
difference in temperature.
Lso the Final driver cast aluminum cover does work to also keep the trans
cooler as it is connected to the trans.
At one time I felt the final drive aluminum cover was not a functional
item, but several people explained that the final drive can run 300 degrees
so reducing the temperature there does influence trans temp. So take it for
what you feel makes sense.
On Mon, Nov 27, 2017 at 6:36 PM, Rob Mueller
wrote:
> Ken,
>
> Try:
>
> https://www.amazon.com/Earls-178003ERL-Stat-Seal-Ring/dp/B0049D7XB8
>
> Regards,
> Rob M.
> The Pedantic Mechanic
> Sydney, Australia
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
> USA '77 Kingsley - TZE 267V100808
>
>
>
> -----Original Message-----
> From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Ken
> Henderson
> Sent: Monday, November 27, 2017 5:46 PM
> To: GMC Mail List
> Subject: Re: [GMCnet] Transmission Leak
>
> My leaks continue also. Yesterday I tried George Z.'s suggestion to put
> O-rings on the suspect bolts. Before I even got them torqued, the O-rings
> could be squeezing out, so I abandoned that -- I wasn't convinced that ATF
> was coming out of my all-deadheaded bolt holes.
>
> At the rear of the pan, where all my leakage occurs, the pan gasket was
> 1/16"-1/8" beyond the pan flange, extending all the way to the vertical
> surface where the chain cover seats. In an effort to determine whether the
> leaks are coming from the transmission pan or the chain cover, I trimmed
> that gasket back to the pan flange. Today I checked the results -- the ATF
> is almost certainly coming over the top of the pan gasket -- where I didn't
> use any sealant. I'll continue to keep the drip pan below the transmission
> until the next ATF change. Then, I'll probably seal both sides of the
> gasket -- as much as I hate the thought of having to clean the transmission
> flange in the future. With my drain plug and external filter, if that
> solves the leak, then in recognition of my age, I'll probably never change
> it again -- just hoping I get a chance to seal both sides. :-)
>
> Ken H.
>
> On Mon, Nov 27, 2017 at 11:58 AM, roy keen wrote:
>
>> On my transmission some were thru bolt holes and some were not. The thru
>> ones needed a flange bolt and gasket or sealent so they wouldn't weep
> fluid.
>> --
> _______________________________________________
> 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] Transmission Leak [message #326425 is a reply to message #326423] |
Tue, 28 November 2017 06:47 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Seriously, Rob, have you tried them on a Ragusa pan? I haven't been able
to find the correct dimensions for the 5/16" Stat-o-Sea, but, extrapolating
from what I have found, they're probably 0.567" or so in diameter. The
Ragusa doesn't have that much machined area around the bolt holes. l had
to use socket head screws with 0.469" OD heads to even install them. Even
if the seating area was available, I wonder if the fastener's head being
smaller than the washer's OD would be a problem?
Ken H.
On Tue, Nov 28, 2017 at 12:24 AM, Rob Mueller
wrote:
> Ken,
>
> I just sent you the link as an example of o-ring seals that could be used
> on bolts and not squeeze out.
>
> IIRC the bolts that hold the trans pan on are 5/16 X 18 so you'd have to
> select the right size.
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Transmission Leak [message #326426 is a reply to message #326425] |
Tue, 28 November 2017 07:13 |
|
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Ken,
Nope, I've never tried these seals on a Ragusa pan.
You mentioned you tried O-rings and they squeezed out; the O-rings in these seals won't squeeze out.
I have no idea if the correct size is available or if they would work on a Ragusa pan.
My intent was to make you aware that they existed.
Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Ken Henderson
Sent: Tuesday, November 28, 2017 6:47 AM
To: GMC Mail List
Subject: Re: [GMCnet] Transmission Leak
Seriously, Rob, have you tried them on a Ragusa pan? I haven't been able
to find the correct dimensions for the 5/16" Stat-o-Sea, but, extrapolating
from what I have found, they're probably 0.567" or so in diameter. The
Ragusa doesn't have that much machined area around the bolt holes. l had
to use socket head screws with 0.469" OD heads to even install them. Even
if the seating area was available, I wonder if the fastener's head being
smaller than the washer's OD would be a problem?
Ken H.
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Transmission Leak [message #326427 is a reply to message #326425] |
Tue, 28 November 2017 07:45 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Whoa, whoa, WHOA.
I just re-read this thread to see what you are doing. When I installed my my Manny trans, Manny was standing right there in my hangar. When he saw I was using a Ragusa trans pan. Hw stopped me and said use NO GASKET. He handed me a tube of some kind of silicone that he liked and said to use it. I do not remember the brand but I never had a problem with it leaking.
Get rid of the gasket and call Manny for the silicone type.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Transmission Leak [message #326431 is a reply to message #326427] |
Tue, 28 November 2017 08:38 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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|
Ken B.,
Thanks, I'll do that. Might even go ahead and do it before the next change
is due if it will cure the problem long term. (I won't tell him I've got
the external filter he doesn't like.) :-)
Ken H.
On Tue, Nov 28, 2017 at 8:45 AM, Ken Burton wrote:
> Whoa, whoa, WHOA.
>
> I just re-read this thread to see what you are doing. When I installed my
> my Manny trans, Manny was standing right there in my hangar. When he saw I
> was using a Ragusa trans pan. Hw stopped me and said use NO GASKET. He
> handed me a tube of some kind of silicone that he liked and said to use it.
> I do not remember the brand but I never had a problem with it leaking.
>
>
> Get rid of the gasket and call Manny for the silicone type.
> --
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Transmission Leak [message #326432 is a reply to message #326431] |
Tue, 28 November 2017 08:44 |
|
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
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Ken H.,
Have you ever seen this photo:
http://www.gmcmhphotos.com/photos/transmission-filter/p57602-filter-2-cut-away.html
I think he's right; why put an extra filter in the loop when you have a paper filter already?
Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Ken Henderson
Sent: Tuesday, November 28, 2017 8:38 AM
To: GMC Mail List
Subject: Re: [GMCnet] Transmission Leak
Ken B.,
Thanks, I'll do that. Might even go ahead and do it before the next change
is due if it will cure the problem long term. (I won't tell him I've got
the external filter he doesn't like.) :-)
Ken H.
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: Transmission Leak [message #326437 is a reply to message #322938] |
Tue, 28 November 2017 10:53 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
|
Senior Member |
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When I was fighting transmission leaks I got a gasket set from Manny, he included O-Rings that go on each bolt. Regarding gaskets, personally, I like the cork gasket. If the pan is straight and the holes aren't dimpled, a cork gasket along with O-Rings on each bolt should work well.
Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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