Front Differential Fluid AGAIN

[jnicks01]

Sorry to post this again, because its been asked a 100 times, but I've been researching sites and just can't figure out what the heck I need for fluid in my front differential.

I am nearing 100K miles and want to change all fluids, brakes, filters, etc.

2007 4x4 Tahoe Z71 package. 5.8L

My manual says to use 80W-90 and gives me the GM part #. I get that, but that part doesn't seem to exist or I guess I have to get it at the dealer. Rather not do that.

What I'm asking is there a product that you have used that is equal and would work?? If so, could you please provide me with a link or at least a product name. All this friction modifier, GL4/5, etc is just confusing me.

Looking to buy all the stuff beforehand. I can't imagine there isn't another equal product out there.

Thanks for any help.

 

[OR VietVet]

Any good parts store, I use NAPA, will have a cross reference for what your manual says is needed. Done it many times.

 

[greenhornet]

GM had a bulletin out to use 75w90 hypoid synthetic fluid ,i have been using 75w90 for 10yrs. now and no problems , also used it in my 1976 Chev 1/2 ton 2wd. 454cu.in. no modifiers in it as it is an open diff. GM recommends synthetic in there diffs for many years now.

 

[Clean07Burb]

Just go to your local parts store and pick up some good quality synthetic 80w-90 or 75w-90 gear oil. Very simple. I think you're over thinking this.

 

[08grey]

Want to do mine to. I have awd. What have you guys used?

 

[jnicks01]

Thanks guys. And yes, I agree with over thinking it.