Recently i changed the differential oil in my truck. Its a prerunner so it only has a rear differential (no LSD). I used 80w90 Lucas oil, used the correct amount, etc. etc. Right after, i took it for a test drive and it was rough as hell. It kind of felt like i was driving on gravel. Very jerky (for lack of a better word ). The ride continued to be EXTREMELY rough. I recently had the suspension TSB completed, but this was prior to the problem. Actually after I had the TSB completed i loved the ride quality. It was only after the differential oil replacement, that the ride quality went to shit (Imagine riding over a road that is nothing but 1 inch high speed bumps placed 1 ft. apart).
I needed to have my 5100's and BFG AT's installed. So I did thinking this would somewhat improve the situation. It did, but only to a certain degree. The extremely rough ride is still present. Some times on a rough section of the freeway, it feels like i could literally bounce out of the lane into the next one. Its horrible and i either need to get it corrected or sell the truck. This SUCKS.
Also wondering why there are no numbers for caster, SAI or Included Angle on my sheet...