OIL for my new gears...

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Here is a simple question

I had 373s put in to replace my stock gears in my 91 coupe. The gears drove me for about 500 - 700 miles....maybe less. The car has been sitting for quite a spell now and i was playing with the idea of popping off the cover, draining and filling back up.

I need to know what the best gear oil (weight and brand) to stick and and about how much i will need. I have red that some people use some purple something or other oil. I just can remember the name. Anyone have any recommendations for me?

Also, i poked my head under it and cant see the filler hole on the case cover ...i am assuming it is on top of the pumpkin. How much oil do i put in.........i dont want to over fill.


I am also going to be putting on a polished stock intake to replace my crusty old grey one. Anyone know where i can get good quality Gasket sets for the rear pumpkin and also my upper intake manifold?

I cant wait to get started...i am probably throwing on some new headers and maybe an h-pipe as well.