Rear end service
#1
#4
I recently did gear oil changes on my differentials. I used Mobil 1 Synthetic 75-W140 in the rear, and have not added any friction modifier. The Mobil 1 website states you can add it if you want, but it's not necessary: https://www.mobiloil.com/USA-English...75W-140LS.aspx
After putting about 200 miles on the truck since, I have not had any problems without the friction modifier.
FYI I used Mobil 1 Synthetic 75-W90 in the front and Mobil 1 Synthetic ATF in the transfer case.
After putting about 200 miles on the truck since, I have not had any problems without the friction modifier.
FYI I used Mobil 1 Synthetic 75-W90 in the front and Mobil 1 Synthetic ATF in the transfer case.