At only around 75k my rear differential is going out. I am second owner and I know the previous owner. neither of us have ever pulled a trailer hauled any loads or abused the truck in any way. I use this truck to go to and from work on highway about 25mile round trip. The rear differential has started to make a shimmy/shake feeling. I first started only when making left hand U turns from a dead stop, progressed to any left hand turn from dead stop, right hand turns followed and now it is doing the shimmy/shake slip feeling from any dead stop.