Transmission extension housing

So far It's been 2 days since I attempted to fix it myself. Drove the car last night, checked the ground under it this morning and no drip marks on the ground. I'll know if it's really fixed in the next few days when I put the car on ramps and check underneath for any fluid where it shouldn't be. I'll update here!
 
I put the car on ramps yesterday and no leaks! Just a little seepage, which can be when I did all the work and put new fluid in and it can be some residual fluid from dropping the pan. I decided to re torque the pan bolts to 10 pounds. I also checked the extension housing bolts and there good! My patch is also holding. I'll check it in another few days.
 
Ultra Ego said:
New thread time.

Vacuum servo go bad or dipstick overflow leak?
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modulator failed and the last time i had it running it was pulling ATF into the intake lol..
 
Gonna bring this thread back to life. Unfortunately the leak is back, but it appears to be coming from the top of the extension housing now and I can't get up there. I'm getting maybe a 3 drips on the ground every 2 weeks. Any other ideas what can be leaking in that area?
 
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silverbullet04 said:
Gonna bring this thread back to life. Unfortunately the leak is back, but it appears to be coming from the top of the extension housing now and I can't get up there. I'm getting maybe a 3 drips on the ground every 2 weeks. Any other ideas what can be leaking in that area?
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What extension housing are you taking about, the drivers side or the passenger side? Both have an "extension housing". Please clarify exactly where the leak is & show pic if you can!
 
HotZ28 said:
What extension housing are you taking about, the drivers side or the passenger side? Both have an "extension housing". Please clarify exactly where the leak is & show pic if you can!
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The pic on the first page is of the one where the final drive is, so thats the passenger side where its got the 5-6 bolts maybe 4 and the surfaces should be machined flat, no gouges, and a gasket is used pretty sure
 
HotZ28 said:
What extension housing are you taking about, the drivers side or the passenger side? Both have an "extension housing". Please clarify exactly where the leak is & show pic if you can!
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1727110217445.webp|this is the seal he needs, he went farther theni expected before the leak returned

But if its leaking from top are you sure its not leaking from above that or elsehwhere ,op?
 
BuickGirlFromMars said:
View attachment 47566|this is the seal he needs, he went farther theni expected before the leak returned

But if its leaking from top are you sure its not leaking from above that or elsehwhere ,op?
Click to expand...
What's above that is transmission related? I can't see anything due to the lack of room in that area.
 
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1727110760950.png
Reverse Band Servo is the ltitle circle on the top of the transmission, inline with the area you are looking at (the end with the hole for the axle shaft) Those are known to leak
1727110949805.png
#04-07-30-028A: 4T65-E AUTOMATIC TRANSMISSION FLUID LEAK FROM REVERSE SERVO COVER (REPLACE REVERSE SERVO COVER SEAL) (JAN 12, 2006)
Models:
2005 and Prior Cars and Light Duty Trucks
with Automatic Transmission 4T65-E (RPOs MN3, MN7, M15, M76)
This bulletin is being revised to announce an improved reverse servo cover seal is available from GMSPO and to advise technicians that it is no longer necessary to replace the reverse servo cover when replacing the seal. The 2005 model year vehicles are also being added.
Condition
Some customers may comment on a fluid leak under the vehicle.
A transmission fluid leak may be noted during the Predelivery Inspection (PDI).
Cause
A possible cause of a transmission fluid leak usually only during cold ambient temperatures below –6.7° C (20° F) may be the reverse servo cover seal. The reverse servo cover seal may shrink in cold ambient temperatures causing a transmission fluid leak.
Correction
Follow the diagnosis and repair procedure below to correct this condition.
1. Diagnose the source of the fluid leak. Refer to Fluid Leak Diagnosis, SI Document ID #634313.
2. If the source of the transmission fluid leak is the reverse servo cover, replace the reverse servo cover seal with P/N 24235894. Refer to Reverse Servo Replacement in the appropriate Service Manual.
3. Clean the area around and below the cover.
4. Inspect the transmission fluid level. Refer to Transmission Fluid Checking Procedure in the appropriate Service Manual.

I would just be sure before doing anything because
"This leak appears to occur at temperatures below 20F. The exhaust crossover pipe and rear manifold must be removed to make the repair, and thus the repair for this condition will be expensive "

You did the front exhaust log from ZZP right? maybe its time for the crossover and rear if you want to do it all at once

The leak may not be there tho, so take that how you will

You can use a product like AT-205 ATP Automotive AT-205 Re-Seal
 
BuickGirlFromMars said:
View attachment 47567
Reverse Band Servo is the ltitle circle on the top of the transmission, inline with the area you are looking at (the end with the hole for the axle shaft) Those are known to leak
View attachment 47568
#04-07-30-028A: 4T65-E AUTOMATIC TRANSMISSION FLUID LEAK FROM REVERSE SERVO COVER (REPLACE REVERSE SERVO COVER SEAL) (JAN 12, 2006)
Models:
2005 and Prior Cars and Light Duty Trucks
with Automatic Transmission 4T65-E (RPOs MN3, MN7, M15, M76)
This bulletin is being revised to announce an improved reverse servo cover seal is available from GMSPO and to advise technicians that it is no longer necessary to replace the reverse servo cover when replacing the seal. The 2005 model year vehicles are also being added.
Condition
Some customers may comment on a fluid leak under the vehicle.
A transmission fluid leak may be noted during the Predelivery Inspection (PDI).
Cause
A possible cause of a transmission fluid leak usually only during cold ambient temperatures below –6.7° C (20° F) may be the reverse servo cover seal. The reverse servo cover seal may shrink in cold ambient temperatures causing a transmission fluid leak.
Correction
Follow the diagnosis and repair procedure below to correct this condition.
1. Diagnose the source of the fluid leak. Refer to Fluid Leak Diagnosis, SI Document ID #634313.
2. If the source of the transmission fluid leak is the reverse servo cover, replace the reverse servo cover seal with P/N 24235894. Refer to Reverse Servo Replacement in the appropriate Service Manual.
3. Clean the area around and below the cover.
4. Inspect the transmission fluid level. Refer to Transmission Fluid Checking Procedure in the appropriate Service Manual.

I would just be sure before doing anything because
"This leak appears to occur at temperatures below 20F. The exhaust crossover pipe and rear manifold must be removed to make the repair, and thus the repair for this condition will be expensive "

You did the front exhaust log from ZZP right? maybe its time for the crossover and rear if you want to do it all at once

The leak may not be there tho, so take that how you will

You can use a product like AT-205 ATP Automotive AT-205 Re-Seal
Click to expand...
Seems like a job, can I do it in my driveway? Lol. The drip only happens every 2 weeks or more and it's very little, but annoying.
 
silverbullet04 said:
Seems like a job, can I do it in my driveway? Lol. The drip only happens every 2 weeks or more and it's very little, but annoying.
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But you dont know where its coming from.. the extension housing, sure, but if you were going to do the manifolds adn the servo you probably want a paved surface and either a shelter over you or in a garage. Because it will be involved.
 
BuickGirlFromMars said:
But you dont know where its coming from.. the extension housing, sure, but if you were going to do the manifolds adn the servo you probably want a paved surface and either a shelter over you or in a garage. Because it will be involved.
Click to expand...
Seems to be the extension housing, but it could be splatter from above. Very strange and it's not soaked in the area, just some splatter every few weeks and a few drips on the ground.
 
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silverbullet04 said:
Seems to be the extension housing, but it could be splatter from above. Very strange and it's not soaked in the area, just some splatter every few weeks and a few drips on the ground.
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Id wonder if your vent was plugged before that then, a plugged vent could force liquid from there
 
1727127568138.webp
know where your electrical connection is? its behind the case mating surface there near it
 
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