1994 Chevy Truck fluid loss

ZIL72

MEMBER
1994 CHEVROLET TRUCK

Transmission problem
1994 Chevy Truck V8 Two Wheel Drive Automatic

Is the front seal of the tranny in this truck servicable? The truck has 135,000 miles and is loosing alot of fluid. A new or rebuilt tranny does not seem like money well spent. I have been told this seal fails and causes this condition. If it can be replaced and extend the life of the tranny I would like to do that. Thanks.

5 Replies

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Hi:
Yes the input shaft seal can be replaced, but the trans will need removed to do it. Are you sure that is where the leak is coming from?

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Tuesday, December 9th, 2008 AT 9:16 PM

ZIL72

MEMBER
3 POSTS

Will the pump bearings/bushings failure cause this? Replacing the pump may be an option to reduce cost as the cost of a rebuild for a truck this age is not worth it. Thanks for the reply.

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Wednesday, December 10th, 2008 AT 9:10 AM

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Hi Again:
Based on the cost of new trucks, I, myself, have decided to continue repairing my old truck. There really isn't anything that would cost more than 4 months worth of car payments.

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Wednesday, December 10th, 2008 AT 10:14 AM

ZIL72

MEMBER
3 POSTS

Good point.
I think if the tranny is out, and it is going to be apart, replacing the pump should be considered. It seems unlikly that just the seal failed and replacing it would solve the problem. Agree?

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Wednesday, December 10th, 2008 AT 11:53 AM

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Hi:
Yes you are right. Seal failure many times is caused by wear on the torque converter. The steel that the seal rides on wears allowing fluid to leak. Honestly, I would have it removed and inspected. There is also a seal where the front pump bolts to the housing that could be leaking. Regardless, the most expensive part of the repair will be the labor to remove and replace the trans itself. If it ends up to be more, then you can decide which is the best way to go, repair it or get a new one.

Let me know how it goes for you.

Joe