What is the recommended gear oil for this rear end? I have been running Mobil 1 75W-90, should I be using a heavier weight? It also has a G80, I've been told to use friction modifier and not too... Who's right? lol

 

The G-80 doesn't require a friction modifier, just synthetic gear oil...the 10 bolt is 75w-90 and I believe that the 14 bolt is also...

 

SAE 75W-90 Synthetic Axle Lubricant (GM Part No. U.S. 12378261, in Canada 10953455) or equivalent meeting GM Specification 9986115. GL5 Rated.

 

Should be good to go then.. Thanks Guys

 

budhayes3, I will personally Buy what ever brand 5W-30 for you to put in your own rear end. All I ask is that you let us all know how long it last and post up the pictures.

 

LOL, I just went back and realized what I posted duh! Fixed it...

 

That's the thing w/. the internet. Ya gotta be careful on advice. Esp. if they don't edit it.
What is 6lug AXN?