[Negative248]

What happens is the oil breaks down after the gears wear in. some say 500 miles some say change at the break in 1500 others say at 3000 after the gears fully wear in..just change it . It's so easy. And don't get to worried about all the metal shavings and liquid metal that comes out...all of us have it...you might have to change it 2 or 3 times depending on how bad it is. DEX LS 75w90 friction modifier

[Negative248]

Trust me guys it the rear diff...the friction modifier breaks down after your gears break in and the clutch pack is what's making the rubbing sound your hearing..when you turn the modifier in the oil lets the clutch slip so you dont have a full posi locker all the time. When the oil isn't doing it's job ..the clutch pack no longer slips when you turn and starts to act like a real locker. It is very annoying..change it boys

[Negative248]

Anyone having a like a single tap or knock sound coming from the engine or dash area only when accelerating from a dead stop. A8 it's very minimal but still annoying .

[Hyper16]

Originally Posted by 90503

Well, the tire rotation has been known to get screwed up. Before you drive it off, make sure the staggered set-up is correct....(Wider wheels in the back, narrower wheels in the front)....Good luck.

Personally, tire rotation on a staggered set-up is more trouble than it's worth.....side to side only?....The risk of a mix-up at the dealer wouldn't be worth it to me....

I got new tires put on the other day and they put the rear wheels on the wrong side. I was showing low pressure and when I checked the tire it was right on. Checked the other side.....aha. I thought to mention to them to make sure they go on the side they came off but the guy seemed to know what he was doing.

[Genesis7]

Originally Posted by Negative248

Trust me guys it the rear diff...the friction modifier breaks down after your gears break in and the clutch pack is what's making the rubbing sound your hearing..when you turn the modifier in the oil lets the clutch slip so you dont have a full posi locker all the time. When the oil isn't doing it's job ..the clutch pack no longer slips when you turn and starts to act like a real locker. It is very annoying..change it boys

Thank you dude you are so helpful, but what if I just let it be? would my diff get ****ed up if I don't change the diff fluid? Thank you so much.

[Marine Corps]

Why would you rotate your tires on the first oil change?

[Akura]

Originally Posted by Negative248

What happens is the oil breaks down after the gears wear in. some say 500 miles some say change at the break in 1500 others say at 3000 after the gears fully wear in..just change it . It's so easy. And don't get to worried about all the metal shavings and liquid metal that comes out...all of us have it...you might have to change it 2 or 3 times depending on how bad it is. DEX LS 75w90 friction modifier

Can you tell us the GM part nr of this fluid?

Thank you.

[Negative248]

Dexron Ls gear oil 75w 90
Part# 10-4034
88862624

[Negative248]

If u have more then 1500 miles on it then change it..or you'll eventually be in the dealer for a new center section and without your car for 2weeks

[Jdelgado92]

This is it right?

[Negative248]

Yup that's the stuff may have to change it to or three times..I know it sucks. At 26$ a qt . And the rear holds just over a qt so you need 2...I believe it's 1.3qts

[Akura]

Originally Posted by Negative248

Dexron Ls gear oil 75w 90
Part# 10-4034
88862624

Thank you!