Sorry, went down the wrong path on that.
Big aluminum driveshaft? They resonate noise pretty good.
Is the thumping /clunking noise in the rear axle while driving down the road, more noticeable it more on the one to two upshift? IF so, try greasing the splines on the end of the rear driveshaft that fits into the transfer case.
IF this is not the case either, then next I would mark the tires at the bottom with a crayon. Drive it for 10 wheel rotations. All of the marks should stilll be at the bottom. IF not then there is a circumference problem that may have caused damage.
IF I'm still in left field on this, post a fresh new question, so it flags as not being answered.
Wednesday, June 17th, 2009 AT 4:48 AM