ski7541

iTrader: (2)

Hello from Afghanistan,(DEployed) I have 04 GMC,1/2 ton,2 wd,4-door,5.3. The problem I am having is I have a viberation between 85 to 92 mph and then it stops doing it the faster I go or I slow down. It has done this afterI installed the programmer to go faster...I took it to two different dealers with A IDK look.... I am fixing this problem when I return home, so doing my homework now...any suggestions ? Thanxs SKI

454navyss

iTrader: (46)

dont drive above 85mph, that is faster than the speed limit everywhere in the US

ski7541

iTrader: (2)

Funny guy....Still it should not do that!!!! And I like to drive fast...

454navyss

iTrader: (46)

make sure everything is balanced correctly, driveshaft, tires, etc. also check u-joints. does it vibrate in the front or back?

Truckshop

iTrader: (17)

crew cab with a 1 piece driveshaft. it is too long. the only way to fix it is to convert to a 2-piece. they are pretty famous for flying from under the truck at speeds over 100.

ski7541

iTrader: (2)

Ouch, flying out at over 100....

ski7541

iTrader: (2)

Have you converted one? or has anyone done this...if so which truck did the 2 piece D/S come from..

ski7541

iTrader: (2)

The vibe, is in the rear...

Truckshop

iTrader: (17)

if you are stock height then you can get one from a 2wd extended cab truck. all you will need to do is make a support for the center bearing.