tranny oil pump removal
Thread Starter
Heel & Toe
Joined: Jul 2008
Posts: 19
Likes: 0
From: Mill Creek WA
tranny oil pump removal
Hey guys, just wondering what your guys' procedures are to remove the transmission oil pump, I have got a 92 auto and need to replace the gasket in there. Any help would be appreciated!
Pro
Joined: Jun 2008
Posts: 610
Likes: 1
This works on a 4l60 e. Not sure about your transmission.
After removing the pan and the filter (and the pump bolts), see if there is an opening in the case right by where the filter goes through. I can't remember if it is obscured by the valve body. The back edge of the pump and the front edge the the first transmission drum will be visible through the opening.
There is room to place a large, flat head screwdriver through the opening and get the blade between the pump and the drum. Then you twist, (not pry), and the pump will pop out.
Is this going to be a rebuild or just a leak fix? There are two teflon sealing rings on the pump that must be replaced when the pump is removed. The teflon seals require expensive special tools to install unless you get the scarf cut rings.
After removing the pan and the filter (and the pump bolts), see if there is an opening in the case right by where the filter goes through. I can't remember if it is obscured by the valve body. The back edge of the pump and the front edge the the first transmission drum will be visible through the opening.
There is room to place a large, flat head screwdriver through the opening and get the blade between the pump and the drum. Then you twist, (not pry), and the pump will pop out.
Is this going to be a rebuild or just a leak fix? There are two teflon sealing rings on the pump that must be replaced when the pump is removed. The teflon seals require expensive special tools to install unless you get the scarf cut rings.
Last edited by M. Schumacher; Sep 19, 2009 at 12:38 AM.
Thread Starter
Heel & Toe
Joined: Jul 2008
Posts: 19
Likes: 0
From: Mill Creek WA
Just a leak fix, when running my transmission suddenly started leaking about a quart of fluid every couple of minutes. Aboatguy, any chance you could link? I was unable to find that thread.
Last edited by Tatsuo; Sep 19, 2009 at 01:06 PM.
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
use Google and search for 700R4-4L60 Build Up Part 4
Last edited by aboatguy; Sep 19, 2009 at 01:38 PM.
Pro
Joined: Jun 2008
Posts: 610
Likes: 1
Your transmission is noted for front pump seal and bushing failure. The bushing pushes out and takes the seal with it.
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
That, and be sure to keep pressure on the output shaft so the drum directly behind the pump doesn't come with it. The clutches inside will come out and you will be working blind getting tham back in. Plus, you could unseat the 2-4 band, if you do that you will have no 2nd or 4th gear. I won't go into how I know this. What I would like to know is how that gasket has failed. I would follow M. Schumacher's advice, this sounds way more likely. They make a retainer for the problem he describes.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
It's really not that hard, you just have to be careful getting the pump out with nothing else coming with it. I will say this, if you're not real mechanically minded then it would be best to have a tranny shop do it.
BUT, if it is only the front seal that has come out then you don't need to pull the pump. How did you arrive at the conclusion that it was that gasket?
BUT, if it is only the front seal that has come out then you don't need to pull the pump. How did you arrive at the conclusion that it was that gasket?