July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Fluid - Differential

Front Axle SAE Synthetic 75W-140
Rear Axle
Normal Duty SAE Thermally Stable 80W-90
Heavy Duty or Trailer Tow Use SAE Synthetic 75W-140

Note: Trac-Lok and Vari-Lok equipped axles require a friction modifier be added to the lubricant.