1999 CCSB drive line vibration after lift

[1999gmc]

Hope this helps

You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach

 

[Jdoggat22]

Hope this helps

You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach

Very nice! You sir are a gemtleman!

 

[Supercharged111]

You sure it's not pinion angle? Lifting it like that screws with the driveline angles, they need to be corrected. The 2 piece driveshaft will exacerbate it because the rear part that moves is short. That's why the GM 1 pc is the factory fix. Not gonna fly with a lift.

 

[Jdoggat22]

Well fellas, the drive shaft shop quoted me around 1000 for the cv setup in the pics 1999gmc sent me. So just out of chance i thought i should cut the carrier bearing mount out. I dropped the cb all the way to the top of the cross member and welded the mounting plate right on top to the cross member. This dropped my carrier bearing just over one inch. To my wallets joyess applaus.... it fixed it!

However, the ujoint at the tcase is out of phase to the other 2, the first section will still need to be reset to be in phase (ds shop) and re balanced. But this seems to be the correction for the drive shaft wobble for ccsb trucks.

I also loaded 2400 lbs of concrete debris in it today to take to the dump, which put the truck in a massive squat, and still no vibration even with out of phase ujoints.

Hope this helps future solution seekers.

Btw, duramax is in the future for this truck! Will post!