I am going to change the fluids in my front/rear differential and transfer case. I have looked in my manual for the proper viscosities and quantities. Question: My manual says to use SAE 90 in the front differential but I see folks seem to be using 75W-90. Is this acceptable and why? I have looked at several sites that reference using 75w-90 but none have indicated why this is OK?
Thanks for your help.:bdh:
Thanks for your help.:bdh: