Diff. Syn Intervals

[papabear050]

SO how long can you go if you change the Diffrential Fluids, Xfer Case, and manny trans oil to sythetics such as Amsoil SG or Redline 75W-90 and MT-90

I know it's every 30K on Dino oil, would syn extend that interval or change every 30.

Also, lubbing the drivetrain throught he zerks is every 5K?

Thanks.