Rear Differential cover

I need to replace my rear differential cover. Its rotted. Where can I get one?

Dealer, salvage yard, Summit Racing to name a few.
Summit Racing Link

What kind of axle is it? Like, the name of it. and what other vehicles have it? Ex: would an S10 pickup have the same one? or the Jimmy, etc....

It would help to know what truck you have now. Year, make, and model.

98 Chevy Blazer 4dr 4wd

They make clears ones tooo. they look neat but kinda pricey. At about $120.00

Why would you want a clear diff cover? Not like you can hang under the truck while you drive down the road... I'd rather spend the $120 on something that was useful.

Back to the original topic, I'd grab one from a junk yard. Any S-10 based vehicle of the same year range (and I even think some Camaros & Firebirds) will have the same diff cover. The yard should be able to bring up a cross-reference chart for you and tell you exactly what to look for... Or you could just call them and tell them that this is what you need and have them grab it for you. A cover from a yard will cost pennies compared with a new cover. Even if it has some rust on it, alittle wire-wheeling and some DeRusto (or equivalent) and it'll be good as new.

What do you guys think would be better. A gasket for the diff or some RTV?

I have always used Permatex Black RTV whether a gasket has been available or not.

Thanks for the help guys. I think I'm just gonna order it from the dealer. Its only $15 from them. I thought it would be way more. As for a gasket or RTV. I was told RTV because it will form to any divets in the metal.

Ok, well there ya go. I wouldn't have thought that it would have been that cheap from the dealership. I know that I can get it for $2 from the local Pick-n-Pull and that is with them pulling it and I only have to pick it up...

I have a chrome diff cover and gasket I need to install...how hard is it to do? and how much oil fits in the diff?