Rear Differential Seal - The 1947 - Present Chevrolet & GMC Truck Message Board Network

keeks69 · 06-06-2013, 10:44 AM

I just cleaned up my rear and and am changing the gasket because its leaking. I bought the new gasket from lmc can i just use that thin gasket by itselft or do i still need some liquid gasket please let me know asap! Wanna get it on the road for the night!

KJSR · 06-06-2013, 01:06 PM

I always use sealer on them.

**Captainfab** · 06-06-2013, 10:22 PM

If you're talking about the rear cover gasket, I always use the FelPro RDS-13391 for the truck 12 bolt. As long as your cover is good and straight and the surface on the housing is not damaged, you should not need any sealer. I only use sealer on gaskets as a last resort, or just a tiny bit if I need to hold the gasket in place until installed.

Rufton · 06-06-2013, 10:31 PM

I prefer RTV and gasket .
Just this year I began experimenting w/ RTV and no gasket in a few applications; I like RTV only thus far.
OEM gasket installed dry on perfect flange can seal for decades but is a hassle to clean off down the road.

06-06-2013, 10:44 AM	#1
keeks69 Registered User Join Date: Feb 2013 Location: Port Huron Michigan Posts: 37	Rear Differential Seal I just cleaned up my rear and and am changing the gasket because its leaking. I bought the new gasket from lmc can i just use that thin gasket by itselft or do i still need some liquid gasket please let me know asap! Wanna get it on the road for the night!

06-06-2013, 01:06 PM	#2
KJSR Registered User Join Date: Aug 2012 Location: Tooele, Utah Posts: 327	Re: Rear Differential Seal I always use sealer on them. __________________ 1936 Chevrolet 1/2t 1964 Chevrolet C10 1964 Chevrolet C10 (sons) 1965 Chevrolet K10 Suburban 1969 Chevrolet C10 1937 Plymouth P4

06-06-2013, 10:22 PM	#3
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,247	Re: Rear Differential Seal If you're talking about the rear cover gasket, I always use the FelPro RDS-13391 for the truck 12 bolt. As long as your cover is good and straight and the surface on the housing is not damaged, you should not need any sealer. I only use sealer on gaskets as a last resort, or just a tiny bit if I need to hold the gasket in place until installed. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

06-06-2013, 10:31 PM	#4
Rufton Registered User Join Date: Apr 2013 Location: Knoxville TN Posts: 1,170	Re: Rear Differential Seal I prefer RTV and gasket . Just this year I began experimenting w/ RTV and no gasket in a few applications; I like RTV only thus far. OEM gasket installed dry on perfect flange can seal for decades but is a hassle to clean off down the road.



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