Engine/Transmission (1994 - 1998) New transmission now driveline vibration

[WadePatton]

Driveline shakes like hell under acceleration, the more the worse. From about 25-40 mph. No matter what gear. New aftermarket auto.



Clears up after 40-max speed. No shake at all there. Also none below 20.



Pulling driveshaft next.



Any any other ideas?



EDIT

I just remembered that there were some washers left out on reassembly. Maybe they were under the carrier bearing?

 

[scramblin]

Stupid suggestion. Make sure your trans bolts are tight. A buddy had the same problem, his bell housing was loose.

 

[WadePatton]

FOUND IT! fixed it.

Stoopid---DOH!



As I was preparing to pull drive shaft, I did some pulling and yanking and YIKES the transfer case was about to fall off.







Now ON WITH THE BOMBing!!!Oo. Oo.

 

[willyslover]

Wade. . if ya didn't already do it. . better check the splines and seals on the transfer case... loose = wobble = dammage



better safe than sorry with roadside exploded unit

 

[WadePatton]

Yep, that'd be a good idea. OK, add that to the list.

 

[JoeBioDiesel]

If all else fails you might want to spin the torque converter 180 degrees on the flexplate. Stacked tolerances can sometimes cause an imbalance. Rebuilt a new Chevy 1-ton and had that exast problem recently. Don't see it often though.



Joe