Diff Fluid....Which fluid do I use????!!

[BRACEYOSELF777]

I was gonna change my diff fluid today and noticed on the cover that it will only take 75W-140.....damn it!!!! I bought 75W-90 of Royal Purple gear oil! Do I still have to use 140???? Just wondering, I'm gonna go back and return the oil and see if they have the 140 in-stock....wish me luck. Should I go with the Mobile 1...the only oil there with 75w-140....or the Royal Purple....75w-140??

[baseballfanz]

I have Mobile1 75w-140 in mine.

[bbomar]

Originally Posted by BRACEYOSELF777

I was gonna change my diff fluid today and noticed on the cover that it will only take 75W-140.....damn it!!!! I bought 75W-90 of Royal Purple gear oil! Do I still have to use 140???? Just wondering, I'm gonna go back and return the oil and see if they have the 140 in-stock....wish me luck. Should I go with the Mobile 1...the only oil there with 75w-140....or the Royal Purple....75w-140??

Actually they have 75w-140 at Wal-mart. $9.86 a quart. And, yes it's syn. Not heard any bad about either. And yes you need to use the 140. Good Luck.

[Wiscdave]

If your 4*4 use it in the front

[BRACEYOSELF777]

Thanks guys.

[COTitan]

i have amsoil 75- 140 in both my front and back diff. I have amsoil ATF in my transfer case.

no problems for either

[BRACEYOSELF777]

Originally Posted by COTitan

i have amsoil 75- 140 in both my front and back diff. I have amsoil ATF in my transfer case.

no problems for either

Who carries amsoil?

[COTitan]

A member called Talkinghorse sells it on the board plus if you look online you can find it