Tracy 13

Put on diagnostic machine, also drove around for an hour, no codes no nothing. Levels, color , smell, and everything all good is what im being told.

177000 miles, yes and no transmission work. T case flushed n filled looked good from what the tech told me. Had it at 2 different dealerships n truck drives perce t , shifts perfe t. They are stumped .

When driving at any speed truck periodically sounds like your driving over rumble straps. Any suggestions??