Front + Rear Diff + T-Case oil flush.

[looking4lc]

i am planning to replace the oil in 3 of them together since i drove 70K Miles. i have read the procedures but my questions are:

1- can i use "limited Slip" in all of them?
2- is this oil (below) perfect for the job? temperature here reaches 120F

 

[2001LC]

Yes on LS. It what most common to find.

I like M1 for all lubes, just because it easy to find, remember and is good stuff. Key is changing/flush at recommended intervals no matter what brand.

Some here may recommend higher viscosity in 120F deg, I'm good with M1 75W-90 in all three anywhere in USA.

 

[looking4lc]

Thanks for your quick response

M1 is not available here Motul and Amsoil are available and have good feedback.
also i found 75W110 Amsoil would you recommend it for 120F in summer and 20F low in winter?

 

[2001LC]

IIRC some here in mud that run long HWY trips in high heat like the 75W-110. They report good results. That said my USA owners manual doesn't mention above 90W, it's highest recommended. Synthetic oil & lubes don't break down in high speed (heat) of race cars, like conventional oils. So 75W-90 should be just fine. You can go the higher if you like, worst case you may build extra pressure causing seals to leak. But know one has report that (leak) to my knowledge.

 

[looking4lc]

some reported lower mpg with 110 or 140 as well.

i will stick with recommended oil.