[B][B][FONT=Arial][SIZE=2][COLOR=Navy][B][IMG]I have a short wheel base 2003 GMC with 410 gear eaton posi and have a vibration at 80+ with a new shaft and yolk. The last time I had this vibation I lost a drive shaft at 100+ and still have this problem. I was told the bearing or the pinion could be the problem. when I changed the posi unit was when I noticed this vibrtion at 80+ Who's the man that could have the master plan

 

did you balance the shaft after you put the new yolk in??? and when the shaft went out, its possible to have damaged the pinion bearings

 

Bring it by the shop and we'll take a look at it......and you can can have a peek at my back bumper

 

No I did not balance the shaft due to it being a brand new shaft and yolk from GM that was balance from the factory. I had the same viberation the day I gave my old drive shaft to the scrap yard when it came out. I have some type of problem I think other than the shaft. Pinion, bearing or shims.

 

67ss509 I'll be by your shop ASAP when I get the first chance this week. Maybe you can just give me your drive train on the red rocket so you can slow down for some of the rest of us in the rear.

 

Keep us update.. I would like to know how this turns out.

 

I'll do

 

still in progress anymore suggestions

 

is your truck lowered maybe your pinion angle is off a little and is puting the shaft in a bind one of my customers trucks had this problem and it was an easy fix

 

Hey my truck was lowered in the rear about 3" what would or how would I be able to tell?