Premium trans pan gasket?

[BEATAV8]

Anybody got any recommendations?

Running a fabricated deep sump pan.

Had a paper type gasket. It leaked. Tried a black rubber type gasket. Was fine until the weather got cold. Then it leaked.

Sucks.......

 

[SSedan64]

Did you retorque the bolts? Usually takes a few times after heat cycles.

 

[bad V6]

I've always had an issue with leaking across the front of the pan when running down to the proper torque, until this last time I had the tranny out. I sprayed Permatex High-Tack Spray a Gasket onto both sides of the gasket, torqued down, and let sit overnight before adding the fluid. There have been no sign of a drip as of yet.

 

[BEATAV8]

Did you retorque the bolts? Usually takes a few times after heat cycles.

I tried... but bolts were already snug. Will see if it helps.

 

[BEATAV8]

I've always had an issue with leaking across the front of the pan when running down to the proper torque, until this last time I had the tranny out. I sprayed Permatex High-Tack Spray a Gasket onto both sides of the gasket, torqued down, and let sit overnight before adding the fluid. There have been no sign of a drip as of yet.

Thanks I will try that if it continues to leak and I gotta drop the pan again.

 

[jpwalt1987]

Permatex Right Stuff!!!

 

[MaxVO2]

I had this problem with the gaskets you describe... I ended up using a good quality cork gasket with Permatex black rtv on both sides of gasket, making sure all surfaces were free of oil and dirt, and snugging everything down a bit until I saw a bit of rtv squeeze out. I didn't snug it down 100% until after letting it dry overnight. So far, no more leaks which had been a big problem for me in the past.

Billy

 

[Dave Dunbar]

Make sure the bolt holes in the pan are flat!! Use a hammer and tap them flat. Cork will work, paper is better, never, ever use silicone on a pan!
Get a speed handle and tighten those bolts just snug. If you still have a leak, its from somewhere else. Good luck!

 

[stovebolt 34]

What Dave says . . . . . My stock pan looks like it was dragged down a gravel road but it does not leak . . . rubber gasket put on dry , torqued to 120 inch lbs . . . . . works for me .

 

[usetaboost]

I used the rubber one on mine, and I've actually reused it twice after that. Make sure it goes on dry as possible and just snug them.

 

[BEATAV8]

I used the rubber one on mine, and I've actually reused it twice after that. Make sure it goes on dry as possible and just snug them.

That's what I did, it was fine until temperature came down into the 30's a few times. I must have a flatness issue with my pan rail.

 

[jpwalt1987]

I have a cast aluminum ATI pan on my th400. I have tried cork and that black rubber looking gasket. They all leak. Pan is flat. Case is flat. Bolts are not over tight. The trick to using the "right stuff" is use a thin smear on the pan and not squeeze it all out while tightening the pan. Let it set for a bit with the bolts just barely snug. I have done this many times with great success. Just don't put a half inch bead then tighten the crap out of the bolts. That's how you end up with a pan full of sealant.

 

[Amelio]

I have the same pan.....always use "Ultra gray" and no gasket I also use this on the rear end cover with no gasket.....many services and never any leaks dry as a bone!

 

[turbo nasty]

Becaerful with silicone as there is fluid exhaust holes on the pan rail that can be blocked with rtv

 

[jpwalt1987]

Just resealed my TH-400 with the "Right Stuff".
Just a thin smear along the pan rail, let it tack with bolts loosely tightened. Let it dry some then tighten all the way. No leaks.

 

[Amelio]

Becaerful with silicone as there is fluid exhaust holes on the pan rail that can be blocked with rtv

hmmmm interesting.....what kind of problems would you see if these holes are blocked? I am curious I have been sealing my pan this way a long time and no issues. Also I dont understand if there are exhaust holes in the pan rail then why does a gasket not block it off either. Please fill me in I have never heard of this.

Thanks

 

[Amelio]

Just resealed my TH-400 with the "Right Stuff".
Just a thin smear along the pan rail, let it tack with bolts loosely tightened. Let it dry some then tighten all the way. No leaks.

I this that stuff but I have never used it to seal a pan gasket.....I do use it to seal the girdle to the block and it does not leak......I would be concerned when removing the pan because it does make one hell of a seal!

 

[jpwalt1987]

I this that stuff but I have never used it to seal a pan gasket.....I do use it to seal the girdle to the block and it does not leak......I would be concerned when removing the pan because it does make one hell of a seal!

Yeah that stuff is a beast to separate the pan from the case. Nothing a razor blade won't take of though.

 

[turbo nasty]

Gasket is a certain width and with the addition of rtv and oozes out making the gasket wider, therefore raising chance of blocking fluid exhaust.
Take a look at the rail next time youll see what i mean.

 

[Amelio]

Gasket is a certian width and the addition rtv and it oozes out making the gasket wider therefore raising chance of blocking fluid exhaust.
Take a look at the rail next time youll see what i mean.

Gotcha....will do thanks for the heads up