How often does everyone change their rear diff fluid? I've almost got 100k on my truck and don't know if its ever been changed. I know that if you pull a trailer often your suppose to change it like every 20k.
I did mine right at 100k cuz i noticed the diff cover was 'wet' so i didnt to be low on oil and burn up the diff...so i changed it..it was a little bit low but nothing concerning..i wont change it till i do my re-gear and locker swap..