Sealing the diff cover - TCCoA Forums
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post #1 of 7 (permalink) Old 05-05-2010, 03:52 AM Thread Starter
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Question Sealing the diff cover

Ok the old "gasket" was torn missing etc.. from it's groove. I have a spare felpro gasket for the 8.8 laying around. How should I go about sealing the cover. I also have a new can of right stuff rtv gasket maker.

Should I:

1: fill the groove with the rtv and bolt it on

2: fill the groove with rtv, rtv the diff housing and use the felpro gasket in between. So cover/rtv/gasket/rtv/housing

3: install the gasket dry with no rtv in the groove in the cover

4: fill the groove with rtv, put the gasket on dry against the housing

My local drivetrain/diff shop recommended method 1 or method 2 just wanted a second opinion.

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post #2 of 7 (permalink) Old 05-05-2010, 06:37 AM
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1: fill the groove with the rtv and bolt it on

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post #3 of 7 (permalink) Old 05-05-2010, 07:12 AM
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The groove was meant for RTV.

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post #4 of 7 (permalink) Old 05-05-2010, 07:25 AM
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I personally like the reusable rubber gaskets from FRPP (I’m not sure if they still offer them).

Very thin coat of RTV on both sides of the gasket, produces a solid seal, and simple removal when/if needed.

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post #5 of 7 (permalink) Old 05-05-2010, 12:53 PM
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Originally Posted by DLF View Post
1: fill the groove with the rtv and bolt it on
x2 -- this worked perfectly for me after a little cleaning with a brass brush

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post #6 of 7 (permalink) Old 05-05-2010, 01:42 PM
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I find a old spark plug works great at cleaning the groove. Use option #1.

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post #7 of 7 (permalink) Old 05-19-2010, 12:24 AM
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yeah, ive done both my 90 and 95 with just RTV in the groove, still no leaks from the 95 after like 3 years, still watching the 90, though it leaks from the halfshaft seals anyway :P

heck i had no idea they even had a gasket for it...

Last edited by nall_one; 05-19-2010 at 12:25 AM. Reason: fatfinger :P
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