i just bought a 2006 3500 drw 5.9 [thur.] it has a shudder when you take off from a stop,i took it back to the dealer yesterday and they said it was fine. i said what ever and left, this is not my first truck somethings wrong anyone have any ideas thanks

 

Another dealer.

?

 

check the fluid level in your rear differential

 

Does it start right at takeoff then goes away after 5-10 mph? Usually it's the driveline angle that needs to be shimmed. Try shimming your carrier bearing down about 1-1.5 inches and see if this helps. If it does then only leave enough shim in there to correct the problem. Too much and it may be a problem when the truck is loaded heavy and the angles change due to the suspension compressing. Also check the U-joints while your under there. There was a TSB for this a while back on earlier model years. Mine is an 05' and I had the same problem. All good now.

Sticky

 

thanks sticky thats just what its doing

 

Yep, Check your fluid levels on level ground. If the rear diff is overfilled or underfilled you can get a problem. The carrier bearing is set up for having an average load on the truck... when you are empty it is off a bit. Shim it to reflect your average load. I found a half inch made the world of difference. ks

 

There is a TSB for 03 through 05 for this.Its a fairly simple check.Ask tthe dealer to perform the check while you wait and ask for a FULL copy of the TSB.