Brand & Weight gear lube for 4:11 Posi rear end

[awsomeears]

Rear end of this nova is posi, was told 4:11

For the hell of it and peace of mind I'm pulling the plug and changing the gear oil, question is what weight should I use and from what I have read there is an additive ?

:thumbsup

I need to get this thing on the road :( but those dam A/C units keep breaking till 8PM :D

[Wagonbacker9]

I'm a big fan of Torco, but I have no idea if it'd be appropriate in your application..

[UnderPSI]

75W-90 and if it's a posi you need friction modifier so it will slip properly.

I use redline or amsoil

[Holeshot]

Using Torco with type F modifier in my GTO Per Diff Technics in OZ and having great results. Royal Purple lasted a season then lost its friction grabbing power.

[jbiscuit]

I like the Napa gear oil with a bottle of the GM posi additive. Get it from a Chevy dealer at the parts counter. Expensive but works great

[awsomeears]

I like the Napa gear oil with a bottle of the GM posi additive. Get it from a Chevy dealer at the parts counter. Expensive but works great

Is this it ????

sure as hell seems to be http://www.classicindustries.com/truck/parts/g7103.html

[SSDude]

Is this it ????

sure as hell seems to be http://www.classicindustries.com/truck/parts/g7103.html
Thats the one

[jbiscuit]

Yep that's it, I got my from Heiser Chevy on Highway 100. Any Chevy dealer should be able to get this for you

[The Shaolin]

Autozone has it too...