Title says it. What oil weight should I use for my engine, tranny, tcase, and diffs (30/8.25)? Doing a complete fluid change and want to do it right lol.

 

Engine oil is kinda of a personal choice,I use 20-50,10w40 is a good choice,i would not go lighter than that.
The trany and xfer case use Dextron 3,and the diffs use 75w90 unless you tow alot and then it would be 75w140. I doubt you have limited slip but make sure you do not need an additive for the diffs

 

This will go far lol. I'd recomend 10w40, but some say not to use that thick. Gear oil, most do 85-140, may have it wrong, but it's the one that's about the thickest weight out there. It's in my older post about gear oil.