I never had posi before so its a 7.5 10 bolt 2.73 posi...before i install it in my car i want to replace the fluid..and make sure its only a 2.73 posi..my question is it calls for limited slip fluid only...i was wondering what weight and how do i no its for limited slip and do i need only 1 quart

 

The limited slip fluid is usually an addative. You can buy it at most parts stores. I believe its around a 4-6 oz. bottle. Other then that you can use any 85W-90 gear oil you like. Not sure of the capacity on the rear end. Probably less then 3 quarts total.

 

how do i know when its full it will oozz out the fill hole? and how much additive do i need only 1 bottle

 

when it comes out the fill hole it is full. just make sure the car level so you over fill or under fill. i believe that my car took one bottle additive and about qt and a half of fluid. i run 75-140 full synthetic in my gta and have no problems with it. just an idea

 

i have the rear on 2 jack stands and a 2x4 lol.. is that ok to add the fluid there...its pretty level..it would be easier out of the car becuz its on the side

 

make sure the pinon is nice and level and you should be fine. btw what is on the side? the filler hole is on rear cover right hand side. and yes it will be easier with it out of the car. not that it is hard with it in but the damn pan hard bar likes to get in the way. :P

 

isnt the filler hole in the side of the diff cover on the right and its a 3/4 female or 1 of the ratchet sizes?

 

yep yep that what i was saying

 

be sure when you get your additive get the gm stuff from the dealer, its only like $9, and its superior to store bought stuff.