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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: chronos on December 30, 2009, 01:01:01 pm

Title: cleaning inside of rear differentail
Post by: chronos on December 30, 2009, 01:01:01 pm: How can I go about cleaning inside of rear differentail
before putting cover back on?
Also what should I use to seal the cover back on , gasket or rtv?
Thanks
Title: Re: cleaning inside of rear differentail
Post by: VileZambonie on December 30, 2009, 02:02:02 pm: Wipe it out. You can use brake clean. Use the right stuff by permatex.
Title: Re: cleaning inside of rear differentail
Post by: 1980c10 on December 30, 2009, 08:35:19 pm: No gasket and what vile said and watch for leaks for a few weeks or so.
Title: Re: cleaning inside of rear differentail
Post by: chronos on December 30, 2009, 09:06:54 pm: Thanks , I can get "Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker"
here is all I can find (I'm in CANADA) I assume this will be OK?
Got the brake cleaner today
Title: Re: cleaning inside of rear differentail
Post by: Mr Diesel on January 01, 2010, 12:14:42 pm: Quote
Thanks , I can get "Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker"

I use this for just about everything that had a gasket. Works great, cheaper, and lasts longer.
Title: Re: cleaning inside of rear differentail
Post by: chronos on January 02, 2010, 03:37:38 pm: Great,I will pick some of that up today.
I have a 1986 10 bolt open rear in this truck.
How much fluid does it hold? Can I put the fluid in through the vent tube?
Title: Re: cleaning inside of rear differentail
Post by: VileZambonie on January 02, 2010, 03:45:57 pm: No you fill it through the fill plug.
Title: Re: cleaning inside of rear differentail
Post by: malibu795 on January 03, 2010, 03:32:52 pm: had a rep from perma tex come to school last week..

they ultra cooper is strong enough to make exhaust gaskets..... lay a bead.. let is dry/skin over then install...
Title: Re: cleaning inside of rear differentail
Post by: SUX2BU99 on January 06, 2010, 10:29:25 am: And it's probably much easier to find a RTV product at various stores and times than it is to buy a gasket from a parts store.

That all said, on my truck, each time I've had a drip from the rear diff, it's been when sealant was used and not a gasket. The two times I've used gaskets and my chrome cover, no leaks. Even when a specialty differential shop was working on my truck, they used sealant and I had a leak. It allllll depends on how good you apply it and clean the surface it's sealing against.
Title: Re: cleaning inside of rear differentail
Post by: Jim Rockford on January 08, 2010, 09:07:12 pm: I always buy a gasket, then smear axle grease on one side of the gasket, that way next time i take it off it doesn't stick.
Title: Re: cleaning inside of rear differentail
Post by: Layne on January 08, 2010, 09:08:30 pm: I put a light coating of rtv on the gasket then put it on. That's me, though
Title: Re: cleaning inside of rear differentail
Post by: VileZambonie on January 09, 2010, 02:30:48 pm: Layne, you're defeating the purpose of the gasket when you do that so why use the gasket? RTV does not ad too the sealability to a gasket. If you like using a gasket, scrap the RTV and use a gasket adhesive sealant.
Title: Re: cleaning inside of rear differentail
Post by: Layne on January 09, 2010, 06:58:43 pm: So it's one or the other? I figured rtv + gasket = no leak.
Title: Re: cleaning inside of rear differentail
Post by: VileZambonie on January 10, 2010, 11:44:45 am: Good RTV = no leak and no need for gasket.
Title: Re: cleaning inside of rear differentail
Post by: Layne on January 11, 2010, 11:41:03 am: Ok thanks. I only use "the right stuff" that you guys recommend anyway, so being extra picky actually makes it worse.