What color or type of RTV does one use on the rear end diff cover?

 

I use the black, but we got some gray that once dry won't leak, and is a pain to get off if it has to come back apart later. Just don't get the cheap stuff, and you'll be ok.

 

Why are you using RTV? I thought you had a Mag-Hytec.

 

I use the red on just about everything with out any problems.

 

i have more than one vehicle


What is the difference in the colors?

 

What is the difference in the colors?

 

Different applications. Black and gray are multi-use, red is high temp, etc. If you are sealing a rear end, use the black. Doesn't look as crappy when seen from the rear as the red does. I used the black on everything at the shop, until we started using the gray. The gray needs time to "set", before any fluids go in, but it SEALS!!!!

 

Use a gasket!

 

I see gray used a lot. When cured properly, it is a great seal.

 

I used to use gaskets on my 9 inch in my old truck. Everytime I did, it would leak. One time, I had it out and they ran out of the gasket at my parts store, so I put RTV on it. Guess what, it never leaked. I haven't put a gasket on one since (around 1991). The only time RTV leaks, is if it isn't properly applied, or oil is put in too soon.

 

Use a gasket!

 

Is gasket vs RTV turning into the next motor oil debate?

 

Is Permatex found at Oreilly good?

 

That's what I've always used...never had a problem with it

 

Permatex is Permatex - it's just there are several different types.