Leaking Trans
Thread Starter
Instructor
Joined: Jun 2009
Posts: 101
Likes: 1
Leaking Trans
Hi all. Since having my auto box rebuilt, I've been getting a leak from the sump. It's around where the cork gasket goes. I've spoken to the rebuilder and I'm satisfied with his answer, that the cork gaskets aren't very good and to try and tighten the bolts a bit more and that there may be a better gasket out there. I nipped up some of the bolts, but I'm still leaking.
But I'm curious, what do you guys get? What have you had to do if anything for a leaking trans?
But I'm curious, what do you guys get? What have you had to do if anything for a leaking trans?
Race Director
Joined: Feb 2004
Posts: 12,517
Likes: 19
Hi all. Since having my auto box rebuilt, I've been getting a leak from the sump. It's around where the cork gasket goes. I've spoken to the rebuilder and I'm satisfied with his answer, that the cork gaskets aren't very good and to try and tighten the bolts a bit more and that there may be a better gasket out there. I nipped up some of the bolts, but I'm still leaking.
But I'm curious, what do you guys get? What have you had to do if anything for a leaking trans?
But I'm curious, what do you guys get? What have you had to do if anything for a leaking trans?
In my experiences, cork works extremely well.
I would buy a new gasket, clean the pan rail, and confirm flatness, then re-install w/new gasket. Lube with a thin layer of vaseline only. NO sealers.
Racer
Joined: Jul 2010
Posts: 308
Likes: 2
From: Kansas City MO
The thin sheetmetal pan usually gets distorted from over-tightening - a quick bit of hammer/dolly work can get it flat again ( you'll see it raised right around the bolt holes - tap them down flat or even slightly 'lower' than the surrounding rail. I've not had problems with cork either but the trans supply shop I buy from is only selling the black (rubber coated?) ones now so that's what I've been using.
Also - be sure to double-check where it's leaking from - a front pump seal or shift selector shaft seal leak can travel down then around the pan rail and drip off far away from the seal that's actually leaking making it look like the pan...
