Gasket question on the 901 tranny

[tlperrine]

I just replaced gaskets on my 901 tranny, it is weeping gear oil. Any tricks to making it stop. The gaskets were replaced on the tail end of the tranny. Thanks for any help. Terry

[Zeke]

Did you put anything on the gasket? I like to thin out Gaskacinch with a little tolulene and coat both sides of the gasket on newspaper or waxpaper and then install. Won't add any percivable thickness and it shouldn't leak. Unless the mating surfaces are dinged up.

[Brad Roberts]

The top tranny builders are using Hylomar..

Pep Boys sells it and it doesnt set up or harden. It stays soft.

B

[sammyg2]

Yup, hylomar be the hot set up. It was developed by Roll Royce jet engine division for use on thier machinery, works good, easy to clean up after, stays pliable so it doesn't leak after many thermal expansion cycles.

[Brad Roberts]

Hylomar is the stickiest stuff I have EVER come across. I started using a small (tiny) brush to apply it. I was tired of it getting it everywhere and not being able to get it off of ME.

B

[sammyg2]

We use gobs of this stuff (Hylomar universal blue) at work. At first we were buying it in small cans that have brushes on the lids, but the stuff gets really thick when exposed to air for a period of time. It is normally almost runny when first opened.

Later we smarted up a bit and started buying it in tubes like RTV or the old fashioned toothpaste dispensers. It has a much better shelf life that way and there seems to be less waste.

[Brad Roberts]

That is how I buy it. I must be doing something correctly.

B

[tlperrine]

Thanks to all for replies. Can I simply pull the tranny apart, apply "gasket sealer" to the currently installed gaskets. Or do I need to buy a new set and apply. The car has not been run since the problem occurred. Thanks, Terry

[Zeke]

You are in a tough spot. It's hard to seal a leak, harder than preventing a leak, anyway. Of course you'll drain the tranny, but there will still be a lot of fluid in there to want to mess up your new sealant.

Here's what I would do: After separating the tranny, leave the car up on stands for a day or two with the nose of the car down. Let the last of the oil n the back of the tranny drip out into your pan. Now I don't know about Hylomar, and I know silicone won't work at this point beacuse of the oilyness of the gasket. But, Gaskacinch is solvent based and will combine with the oil residue. Wipe everything (both flanges and gasket) with lacquer thinner using a Q-Tip if you have to, and let dry. Check for any more oil running down on your mating surfaces. Put a tiny amount of the lac thin (better to use tolulune if you have a bit) in the gaskacinch and butter up the gasket with a small brush. Close the tranny up and leave sit for another day before filling.

It might work.

[Brad Roberts]

That *might* work.

Ask PP if they sell the gaskets individually.

If not... I keep all the extra gaskets from all the kits that get sold through the shop on rebuilds.

This leaves us with a huge stash of the indvidual gaskets.

You can feel the current gaskets and look at their color to determine which ones you need. There are 3 possibilities. 1 tan thin one 1 brown thick one and 1 green thin one. The ones we are concerned about are the intermediate plate to case gaskets. This sets the final pinion depth. Normally there is 2-3 of these brown/tan gaskets in there. They will all appear tan after they get gear lube on them. This is when you want to "feel them" and figure out which ones are thick and thin.

B

[gint]

Hey Terry,

If you're interested I have a spare side shifter trans I'd loan you to get the car back on the road while you work on your trans. I don't know for certain that it's a really good unit, but if you want to throw it in we might both benefit. I don't need it back right away as it's a donor to convert my tail shifter in the /6.

Altough I seem to remember you saying you had another one yourself. Yes/no? Have you considered swapping it out (even if only temporarily)?