Leaky Transmission Output shaft Seal - ZR-1 Net Registry Forums

Jagdpanzer · 11-01-2008

Just confirmed a small oil leak back at the transmission output shaft seal.
I understand this seal is common with other GM transmissions under PN 10140538. To get at it the drive shaft and exhaust will obviously have to be removed. Does anyone know if the seal can be replaced without having to unbolt the transmission tail housing?

zr1don · 11-01-2008

I replaced mine when I had the trans out. The driveshaft must be removed & the seal can be r&r'd. Make sure the trans surface the seal sets in is clean befor installing the new seal.

janozr1 · 11-02-2008

Can you get this seal separetly or still just in kit ?

Jagdpanzer · 11-02-2008

Picked up a new PN 10140538 seal at the local Chevy store and put it in today.To get at it I had to remove the Corsa exhaust (the flex joints I added sure make removal and reinstallation easy), unbolt the C-beam, and pull the drive shaft. Bill Boudreau sent me a note confirming that the transmission extension housing did not have to be removed to replace the seal (thanks Bill). I was able to pry out the old seal using a small pair of end cutters and a flat blade screw driver. The old seal was somewhat brittle and a 1/2" section appeared to have become un bonded from the outer shell which was the source of the leak. The new seal drove in without a hitch. Put it all back together, topped off the transmission oil level and took it out for a short test drive. So far every looks dry with no sign of oil leaking past the seal. Total repair time was about three hours.

HIZNHRZ · 11-02-2008

3 Hours!

Heck that would be a weekend project for me.

Jagdpanzer · 11-02-2008

Quote:

Originally Posted by HIZNHRZ

3 Hours!

Heck that would be a weekend project for me.

Having a 4 post lift, pnuematic ratchet and impact wrenches sure help make the job go easier.

11-01-2008	#1
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,663	Leaky Transmission Output shaft Seal Just confirmed a small oil leak back at the transmission output shaft seal. I understand this seal is common with other GM transmissions under PN 10140538. To get at it the drive shaft and exhaust will obviously have to be removed. Does anyone know if the seal can be replaced without having to unbolt the transmission tail housing?

11-01-2008	#2
zr1don Join Date: Jan 2006 Location: Temecula, CA Posts: 92	Re: Leaky Transmission Output shaft Seal I replaced mine when I had the trans out. The driveshaft must be removed & the seal can be r&r'd. Make sure the trans surface the seal sets in is clean befor installing the new seal.

11-02-2008	#3
janozr1 Join Date: Jul 2005 Location: SLOVENIA,EU Posts: 126	Re: Leaky Transmission Output shaft Seal Can you get this seal separetly or still just in kit ?

11-02-2008	#4
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,663	Re: Leaky Transmission Output shaft Seal Picked up a new PN 10140538 seal at the local Chevy store and put it in today.To get at it I had to remove the Corsa exhaust (the flex joints I added sure make removal and reinstallation easy), unbolt the C-beam, and pull the drive shaft. Bill Boudreau sent me a note confirming that the transmission extension housing did not have to be removed to replace the seal (thanks Bill). I was able to pry out the old seal using a small pair of end cutters and a flat blade screw driver. The old seal was somewhat brittle and a 1/2" section appeared to have become un bonded from the outer shell which was the source of the leak. The new seal drove in without a hitch. Put it all back together, topped off the transmission oil level and took it out for a short test drive. So far every looks dry with no sign of oil leaking past the seal. Total repair time was about three hours.

11-02-2008	#5
HIZNHRZ Join Date: Apr 2004 Location: Germantown, MD Posts: 738	Re: Leaky Transmission Output shaft Seal 3 Hours! Heck that would be a weekend project for me.