[strtlegal]

I put in a new set of gears at the same time I put in my 4 link, it howled like crazy. changed out the gears several times, then realized my driveshaft was to long. I shortened it up a tad and it got super quiet. I still have the 4th gear noise you talk about but was still figuring I needed to play with the rear end a little bit..But if this is a common noise then yes mine has it.