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Transmission pan leaks [message #358504] Sat, 12 September 2020 06:26 Go to next message
tgeiger is currently offline  tgeiger   United States
Messages: 518
Registered: February 2006
Location: kansas city
Karma: -1
Senior Member
So its been awhile since I last dealt with this and so I’m still experiencing leaking occurring at I believe the back portion of the transmission pan. I had flatten the flange with a hammer and dowel. I also used a cork gasket and Permatex Form A Gasket all around. So I’ve done that all. So here comes the dumb question. Is there a thicker gasket to seal this up with much like the thicker exhaust gaskets for the header pipes you guys recommended awhile back? Those gaskets sealed up the exhaust leaks perfectly. I also recall a few bolts that might be causing potential leaks because they penetrate the oil reservoir. I also am restoring a TR6, the leak master, or some call it its rust prevention system. But they have right ups on sealing the bolt threads for some bolts that also penetrate the oil reservior as well. Just wondering about taking another swing at this.

Thanks,
Tom


Tom Geiger 76 Eleganza II KCMO
Re: Transmission pan leaks [message #358509 is a reply to message #358504] Sat, 12 September 2020 09:07 Go to previous messageGo to next message
RF_Burns is currently offline  RF_Burns   Canada
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
Senior Member
Here are a couple other leak locations that can be hard to find. The fluid moves along the housing to the lowest point where it drips.

-Manual shifter shaft. When the coach is sitting and the transmission fluid leaks down, the fluid level is higher than the shifter shaft. So it leaks when sitting. Most Turbo-Hydramatics have a seal on the outside of the housing, but the TH425 has an O-Ring on the shifter shaft. Its a bit of a pain to change, but the O-ring is a cheap common part.

-Support welds on the dipstick tubes. There is a brace on the dipstick tube which was spot welded in place. My brace was broken off and left a hole in the tube where the spot weld was. I used a piece of Cold-Shrink tubing to seal the dipstick, then a hose clamp to fast the support to the dipstick. Replace the O-ring seal where the dipstick tube enters the transmission housing.

Just a couple of leak points that dripped off my pan.




Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
Re: [GMCnet] Transmission pan leaks [message #358514 is a reply to message #358509] Sat, 12 September 2020 10:23 Go to previous messageGo to next message
jimk is currently offline  jimk   United States
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
Senior Member
If yoo did the gasket and sealant correctly and wait for15 minutes then put
in fluid,it should not leak fron the pan.
Look to see if it can be from the rear chain cover.

On Sat, Sep 12, 2020 at 7:08 AM Bruce Hislop via Gmclist <
gmclist@list.gmcnet.org> wrote:

> Here are a couple other leak locations that can be hard to find. The
> fluid moves along the housing to the lowest point where it drips.
>
> -Manual shifter shaft. When the coach is sitting and the transmission
> fluid leaks down, the fluid level is higher than the shifter shaft. So it
> leaks when sitting. Most Turbo-Hydramatics have a seal on the outside of
> the housing, but the TH425 has an O-Ring on the shifter shaft. Its a bit of
> a pain to change, but the O-ring is a cheap common part.
>
> -Support welds on the dipstick tubes. There is a brace on the dipstick
> tube which was spot welded in place. My brace was broken off and left a
> hole
> in the tube where the spot weld was. I used a piece of Cold-Shrink tubing
> to seal the dipstick, then a hose clamp to fast the support to the
> dipstick. Replace the O-ring seal where the dipstick tube enters the
> transmission housing.
>
> Just a couple of leak points that dripped off my pan.
>
>
>
> --
> Bruce Hislop
> ON Canada
> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
> My Staff says I never listen to them, or something like that
>
> _______________________________________________
> 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.gmcrvparts.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
Re: [GMCnet] Transmission pan leaks [message #358515 is a reply to message #358514] Sat, 12 September 2020 12:09 Go to previous messageGo to next message
Dolph Santorine is currently offline  Dolph Santorine   United States
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
Senior Member
Someone was telling me that putting o-ring’s on the transmission bolts was very helpful.

Thoughts?

Dolph Santorine

DE AD0LF

Wheeling, West Virginia

1977 ex-Palm Beach TZE167V100820
Howell EFI/EBL , Reaction Arms, Manny Transmission


> On Sep 12, 2020, at 11:24 AM, Jim Kanomata via Gmclist wrote:
>
> If yoo did the gasket and sealant correctly and wait for15 minutes then put
> in fluid,it should not leak fron the pan.
> Look to see if it can be from the rear chain cover.
>
>> On Sat, Sep 12, 2020 at 7:08 AM Bruce Hislop via Gmclist > gmclist@list.gmcnet.org> wrote:
>>
>> Here are a couple other leak locations that can be hard to find. The
>> fluid moves along the housing to the lowest point where it drips.
>>
>> -Manual shifter shaft. When the coach is sitting and the transmission
>> fluid leaks down, the fluid level is higher than the shifter shaft. So it
>> leaks when sitting. Most Turbo-Hydramatics have a seal on the outside of
>> the housing, but the TH425 has an O-Ring on the shifter shaft. Its a bit of
>> a pain to change, but the O-ring is a cheap common part.
>>
>> -Support welds on the dipstick tubes. There is a brace on the dipstick
>> tube which was spot welded in place. My brace was broken off and left a
>> hole
>> in the tube where the spot weld was. I used a piece of Cold-Shrink tubing
>> to seal the dipstick, then a hose clamp to fast the support to the
>> dipstick. Replace the O-ring seal where the dipstick tube enters the
>> transmission housing.
>>
>> Just a couple of leak points that dripped off my pan.
>>
>>
>>
>> --
>> Bruce Hislop
>> ON Canada
>> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
>> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
>> My Staff says I never listen to them, or something like that
>>
>> _______________________________________________
>> 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.gmcrvparts.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org


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Re: [GMCnet] Transmission pan leaks [message #358518 is a reply to message #358515] Sat, 12 September 2020 14:07 Go to previous messageGo to next message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
Senior Member
It didn't help me at all. After sealing the inside of the pan, slightly
chamfering the bolt holes for O-rings, RTV on the gasket, and great
assembly care, I STILL have drips from my Rockwell pan.

Ken H.


On Sat, Sep 12, 2020 at 1:10 PM Adolph Santorine via Gmclist <
gmclist@list.gmcnet.org> wrote:

> Someone was telling me that putting o-ring’s on the transmission bolts was
> very helpful.
>
> Thoughts?
>
> Dolph Santorine
>
> DE AD0LF
>
> Wheeling, West Virginia
>
> 1977 ex-Palm Beach TZE167V100820
> Howell EFI/EBL , Reaction Arms, Manny Transmission
>
>
>> On Sep 12, 2020, at 11:24 AM, Jim Kanomata via Gmclist gmclist@list.gmcnet.org> wrote:
>>
>> If yoo did the gasket and sealant correctly and wait for15 minutes then
> put
>> in fluid,it should not leak fron the pan.
>> Look to see if it can be from the rear chain cover.
>>
>>> On Sat, Sep 12, 2020 at 7:08 AM Bruce Hislop via Gmclist >> gmclist@list.gmcnet.org> wrote:
>>>
>>> Here are a couple other leak locations that can be hard to find. The
>>> fluid moves along the housing to the lowest point where it drips.
>>>
>>> -Manual shifter shaft. When the coach is sitting and the transmission
>>> fluid leaks down, the fluid level is higher than the shifter shaft. So
> it
>>> leaks when sitting. Most Turbo-Hydramatics have a seal on the outside
> of
>>> the housing, but the TH425 has an O-Ring on the shifter shaft. Its a
> bit of
>>> a pain to change, but the O-ring is a cheap common part.
>>>
>>> -Support welds on the dipstick tubes. There is a brace on the dipstick
>>> tube which was spot welded in place. My brace was broken off and left a
>>> hole
>>> in the tube where the spot weld was. I used a piece of Cold-Shrink
> tubing
>>> to seal the dipstick, then a hose clamp to fast the support to the
>>> dipstick. Replace the O-ring seal where the dipstick tube enters the
>>> transmission housing.
>>>
>>> Just a couple of leak points that dripped off my pan.
>>>
>>>
>>>
>>> --
>>> Bruce Hislop
>>> ON Canada
>>> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
>>> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
>>> My Staff says I never listen to them, or something like that
>>>
>>> _______________________________________________
>>> 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.gmcrvparts.com
>> 1-800-752-7502
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
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>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
Re: [GMCnet] Transmission pan leaks [message #358527 is a reply to message #358518] Sat, 12 September 2020 18:38 Go to previous messageGo to next message
JohnS is currently offline  JohnS   United States
Messages: 126
Registered: December 2014
Location: Vacaville, CA
Karma: -2
Senior Member
I have had the same experience as Ken, only with a Ragusa pan (maybe they are the same). Did it all and it still seeps, leaves a dollar sized spot if parked a couple of weeks, but doesn't embarrass me at a lunch stop, so I am starting to live with it.

JohnS


John Shutzbaugh, Vacaville, CA, ncserv@aol.com; 78 Buskirk stretch, "What were we thinking?"
Re: [GMCnet] Transmission pan leaks [message #358529 is a reply to message #358527] Sat, 12 September 2020 19:24 Go to previous messageGo to next message
James Hupy is currently offline  James Hupy   United States
Messages: 6806
Registered: May 2010
Karma: -62
Senior Member
My Ragusa Cast Aluminum Ribbed increased volume transmission pan seeped ATF
after I carefully installed it. So, I drained it, and removed it. I have a
friend who has a transmission shop, and he has a high-zoot parts cleaner.
It uses several steps, but the final wash uses dishwasher detergents, and a
very hot rinse. Parts come out cleaner than when they were new. I had him
clean my pan. Then, I sprayed the inside with an insulating varnish used to
coat transformer coils, field windings, etc. It is a product sold by
Eastwood Company. The product name escapes me, and the smoke here is too
thick for me to venture out to the shop due to the wildfires.
Anyway, I sprayed several coats on the inside of the pan, then baked
it for 12 hours at 200° in my powder coat oven. It feels like a hard
coating when cured. I bolted it back on with a new black gasket, and no
more leaks.
Jim Hupy
Salem, Oregon

On Sat, Sep 12, 2020, 4:39 PM John Shutzbaugh via Gmclist <
gmclist@list.gmcnet.org> wrote:

> I have had the same experience as Ken, only with a Ragusa pan (maybe they
> are the same). Did it all and it still seeps, leaves a dollar sized spot if
> parked a couple of weeks, but doesn't embarrass me at a lunch stop, so I
> am starting to live with it.
>
> JohnS
> --
> John Shutzbaugh, Vacaville, CA, ncserv@aol.com;
> 77 Eleganza, bought it new, can't blame PO; and
> 78 Buskirk stretch, "What were we thinking?"
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Re: [GMCnet] Transmission pan leaks [message #358530 is a reply to message #358527] Sat, 12 September 2020 19:35 Go to previous messageGo to next message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
Senior Member
My bad! It's that other "R" -- Ragusa, not Rockwell! :-(

Ken H.


On Sat, Sep 12, 2020 at 7:39 PM John Shutzbaugh via Gmclist <
gmclist@list.gmcnet.org> wrote:

> I have had the same experience as Ken, only with a Ragusa pan (maybe they
> are the same). Did it all and it still seeps, leaves a dollar sized spot if
> parked a couple of weeks, but doesn't embarrass me at a lunch stop, so I
> am starting to live with it.
>
> JohnS
> --
> John Shutzbaugh, Vacaville, CA, ncserv@aol.com;
> 77 Eleganza, bought it new, can't blame PO; and
> 78 Buskirk stretch, "What were we thinking?"
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
Re: Transmission pan leaks [message #358531 is a reply to message #358504] Sat, 12 September 2020 20:29 Go to previous messageGo to next message
tgeiger is currently offline  tgeiger   United States
Messages: 518
Registered: February 2006
Location: kansas city
Karma: -1
Senior Member
So all good ideas here. Anyone want to comment on the thick gasket idea? Even if it required longer pan bolts? Or is it not possible?

TG


Tom Geiger 76 Eleganza II KCMO

[Updated on: Sat, 12 September 2020 20:33]

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Re: [GMCnet] Transmission pan leaks [message #358532 is a reply to message #358529] Sat, 12 September 2020 20:03 Go to previous messageGo to next message
James Hupy is currently offline  James Hupy   United States
Messages: 6806
Registered: May 2010
Karma: -62
Senior Member
I remember the name. Glyptal insulating varnish.
Judy says that our brains are like a Rolodex. We just have to whirl it
around until we come to the information we seek.Jim Hupy
Salem, Oregon


On Sat, Sep 12, 2020, 5:24 PM James Hupy wrote:

> My Ragusa Cast Aluminum Ribbed increased volume transmission pan seeped
> ATF after I carefully installed it. So, I drained it, and removed it. I
> have a friend who has a transmission shop, and he has a high-zoot parts
> cleaner. It uses several steps, but the final wash uses dishwasher
> detergents, and a very hot rinse. Parts come out cleaner than when they
> were new. I had him clean my pan. Then, I sprayed the inside with an
> insulating varnish used to coat transformer coils, field windings, etc. It
> is a product sold by Eastwood Company. The product name escapes me, and the
> smoke here is too thick for me to venture out to the shop due to the
> wildfires.
> Anyway, I sprayed several coats on the inside of the pan, then baked
> it for 12 hours at 200° in my powder coat oven. It feels like a hard
> coating when cured. I bolted it back on with a new black gasket, and no
> more leaks.
> Jim Hupy
> Salem, Oregon
>
> On Sat, Sep 12, 2020, 4:39 PM John Shutzbaugh via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> I have had the same experience as Ken, only with a Ragusa pan (maybe they
>> are the same). Did it all and it still seeps, leaves a dollar sized spot if
>> parked a couple of weeks, but doesn't embarrass me at a lunch stop, so I
>> am starting to live with it.
>>
>> JohnS
>> --
>> John Shutzbaugh, Vacaville, CA, ncserv@aol.com;
>> 77 Eleganza, bought it new, can't blame PO; and
>> 78 Buskirk stretch, "What were we thinking?"
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
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Re: [GMCnet] Transmission pan leaks [message #358535 is a reply to message #358531] Sat, 12 September 2020 22:15 Go to previous messageGo to next message
stu@97381.com, Emery  is currently offline  stu@97381.com, Emery   United States
Messages: 232
Registered: June 2020
Karma: 2
Senior Member
Another suggestion. You can sometimes get a very small leak from one of the transmission cooler tubes at the top of the transmission. It will run down the top of the transmission and to the rim of the pan. It then looks exactly like a pan leak.
You can use a little baby powder to help find this leak. I could not tighten it enough with my tubing wrench. I finally used a crows foot at the end of a socket extension and it turned a half turn and sealed. No more pan drip.

Emery Stora
77 Kingsley
Frederick CO

> On Sep 12, 2020, at 7:30 PM, tom geiger via Gmclist wrote:
>
> So all good ideas here. Anyone want to comment on the thick gasket idea? Even if it required longer pan bolts? Or is not possible?
>
> TG
> --
> Tom Geiger
> 76 Eleganza II
> KCMO
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

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[GMCnet] Re: Transmission pan leaks [message #367310 is a reply to message #358504] Mon, 25 October 2021 10:52 Go to previous messageGo to next message
jimk is currently offline  jimk   United States
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
Senior Member
The Flared Copper washer is a part we all use to get the steel Flared tube
to seal against the brass fitting.
The Commonest Chinese make the fittings with sloppy control and flood it to
us.
Never had so much issues before they started supplying them.

On Mon, Oct 25, 2021 at 8:38 AM Fred Hudspeth wrote:

> Tom,
>
> The chain cover gasket was the source of the leak on mine. 'Did not
> conclude/confirm that until I addressed all other possibilities. The leak
> (mostly a "seep") was at the intersection of the chain cover with the
> transmission pan mounting flange, giving the appearance that the pan gasket
> (or something above it) was the source.
>
> The transmission has to be removed to replace the gasket (unless someone
> has found a way to do it place). 'Had the gasket replaced when I had the
> engine changed out. 'End of leak and "housekeeping mess" on my garage
> floor...
>
> HTH,
>
> Fred Hudspeth
>
>
> Fred Hudspeth
> 1978 Royale (TZE 368V101335) - Tyler, TX
> 1982 Airstream Excella (motorhome) - Cooper Landing, Alaska
>
>
>
> Message: 1
> Date: Sun, 24 Oct 2021 07:16:24 -0600
> From: tom geiger
> Subject: [GMCnet] Re: Transmission pan leaks
> To: gmclist@list.gmcnet.org
> Message-ID:
> Content-Type: text/plain; charset="utf-8"
>
> I have now got the transmission pan off, flanges flattened and reinstalled
> back on and bolted up. While I have the fluid I thought I’d check the
> other upper sources of leaks. Now I’ve done some searching and maybe not
> enough but I see other items identified such as cooler lines, dipstick
> leak and speedo cable leak, to which I think I have. In my search I’m not
> seeing anything definitive on repairs for the speedo cable leak? Is it
> just a new cable replacement? Also what is the best repair for cooling
> line leak? Is it a copper washer? I believe the dipstick leak repair is
> with RTV per Jim K’s response to a post.
>
> Thanks,
> TG
> --
> Tom Geiger
> 76 Eleganza II
> KCMO
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>


--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
[GMCnet] Re: Transmission pan leaks [message #367311 is a reply to message #358504] Mon, 25 October 2021 10:38 Go to previous messageGo to next message
fbhtxak is currently offline  fbhtxak   United States
Messages: 191
Registered: April 2006
Karma: 0
Senior Member
Tom,

The chain cover gasket was the source of the leak on mine. 'Did not conclude/confirm that until I addressed all other possibilities. The leak (mostly a "seep") was at the intersection of the chain cover with the transmission pan mounting flange, giving the appearance that the pan gasket (or something above it) was the source.

The transmission has to be removed to replace the gasket (unless someone has found a way to do it place). 'Had the gasket replaced when I had the engine changed out. 'End of leak and "housekeeping mess" on my garage floor...

HTH,

Fred Hudspeth


Fred Hudspeth
1978 Royale (TZE 368V101335) - Tyler, TX
1982 Airstream Excella (motorhome) - Cooper Landing, Alaska



Message: 1
Date: Sun, 24 Oct 2021 07:16:24 -0600
From: tom geiger
Subject: [GMCnet] Re: Transmission pan leaks
To: gmclist@list.gmcnet.org
Message-ID:
Content-Type: text/plain; charset="utf-8"

I have now got the transmission pan off, flanges flattened and reinstalled back on and bolted up. While I have the fluid I thought I’d check the other upper sources of leaks. Now I’ve done some searching and maybe not enough but I see other items identified such as cooler lines, dipstick leak and speedo cable leak, to which I think I have. In my search I’m not seeing anything definitive on repairs for the speedo cable leak? Is it just a new cable replacement? Also what is the best repair for cooling line leak? Is it a copper washer? I believe the dipstick leak repair is with RTV per Jim K’s response to a post.

Thanks,
TG
--
Tom Geiger
76 Eleganza II
KCMO
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Re: [GMCnet] Re: Transmission pan leaks [message #367347 is a reply to message #367311] Thu, 28 October 2021 05:40 Go to previous messageGo to next message
tgeiger is currently offline  tgeiger   United States
Messages: 518
Registered: February 2006
Location: kansas city
Karma: -1
Senior Member
Kinda thinking the same Fred. I want to eliminate all other sources before it gets to the hard to fix leaks. I took a quick look at the back cover and it looks like the transmission has to be removed to get this cover off. Anyhow, will watch for it leaking when other leaks are resolved.

I do have a couple more questions. I’ve discovered the vent pipe on the top of the transmission has the elbow installed but no hose nor bottle resevior installed. What would be the routing of hose and position of overflow bottle? Thought I’d get that installed immediately.

I’ve resealed the transmission pan and have read 2 volumes of ATF to put back in to get fluid back up to operation full levels. One post said 4 quarts, and another said 6 quarts. I have a OEM pan.

Sorry, one more question. I too am struggling on reading the dipstick after it runs. It seems to have fluid all up and down the stick so can’t say I know for sure of its level. I have put in 4 qrts into the transmission thinking it would be full. I can do the Manny procedure if needed to determine correct full level. I can call Jim K or Manny to go over that procedure to make sure I understand it properly. Seemed there is some confusion on doing it “cold” in the driveway after running the selector up and down in the transmission or doing it after its been driving it a bit.

Thanks,
TG


Tom Geiger 76 Eleganza II KCMO
[GMCnet] Re: Transmission pan leaks [message #367355 is a reply to message #367347] Thu, 28 October 2021 12:52 Go to previous messageGo to next message
jimk is currently offline  jimk   United States
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
Senior Member
Route the hose to the outside of the frame and attach a small 12 ounce
plastic bottle.
This will be an indication when it spits out.]



On Thu, Oct 28, 2021 at 3:40 AM tom geiger wrote:

> Kinda thinking the same Fred. I want to eliminate all other sources
> before it gets to the hard to fix leaks. I took a quick look at the back
> cover
> and it looks like the transmission has to be removed to get this cover
> off. Anyhow, will watch for it leaking when other leaks are resolved.
>
> I do have a couple more questions. I’ve discovered the vent pipe on the
> top of the transmission has the elbow installed but no hose nor bottle
> resevior installed. What would be the routing of hose and position of
> overflow bottle? Thought I’d get that installed immediately.
>
> I’ve resealed the transmission pan and have read 2 volumes of ATF to put
> back in to get fluid back up to operation full levels. One post said 4
> quarts, and another said 6 quarts. I have a OEM pan.
>
> Sorry, one more question. I too am struggling on reading the dipstick
> after it runs. It seems to have fluid all up and down the stick so can’t
> say
> I know for sure of its level. I have put in 4 qrts into the transmission
> thinking it would be full. I can do the Manny procedure if needed to
> determine correct full level. I can call Jim K or Manny to go over that
> procedure to make sure I understand it properly. Seemed there is some
> confusion on doing it “cold” in the driveway after running the selector up
> and down in the transmission or doing it after its been driving it a
> bit.
>
> Thanks,
> TG
> --
> Tom Geiger
> 76 Eleganza II
> KCMO
> _______________________________________________
> GMCnet mailing list
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>


--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
Re: [GMCnet] Re: Transmission pan leaks [message #367371 is a reply to message #367347] Thu, 28 October 2021 19:27 Go to previous messageGo to next message
Carl S. is currently offline  Carl S.   United States
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
Senior Member

When you add the vent tube, make sure it has a reverse trap (hump) in it. I had trouble with the vent hose actin like a siphon. It sucked fluid out of the transmission until I put a longer hose on it and raised it up just after it left the elbow., then routed it to the outside of the frame as Jim suggested, with a small bottle on the end as a test reservoir.

Carl Stouffer '75 ex Palm Beach Tucson, AZ. Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
Re: [GMCnet] Re: Transmission pan leaks [message #367376 is a reply to message #367371] Fri, 29 October 2021 05:37 Go to previous message
tgeiger is currently offline  tgeiger   United States
Messages: 518
Registered: February 2006
Location: kansas city
Karma: -1
Senior Member
Good morning Carl, thanks for the info on the siphon issue very timely I’m hunting for a small bottle to use for the reservoir. I did get 4ft of hose so I’m hoping to have enough. So plan on doing the routing and adding the bottle this morning. We’re taking a little camping weekend at one of our state parks nearby with other camping friends so will be able to check out the setup.
Thanks again to Jim K who spent some time with me going over the transmission issues and was very helpful in clearing up some questions for me. I’ve used Hylomar Blue on the transmission pan and some thread seal on the pan bolts so hoping this does the trick. I do have a washer o-ring kit for the speedo bullet to fix that leak. So getting each of these sources of leaks taken care of one at a time. I do have a question on the back sprocket gasket seal if thats a issue, would I need to have the transmission removed to get at that gasket seal or is there a way to do it in place?

Thanks
TG


Tom Geiger 76 Eleganza II KCMO

[Updated on: Fri, 29 October 2021 08:18]

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