Mechanics

CHEVY VIBRATION IN DRIVE SHAFT

1999 Chevrolet Silverado

Drive Train Axles Bearings problem
1999 Chevy Silverado V8 Four Wheel Drive Automatic 115000 miles

I recently replaced the both U-Joints in the rear drive shaft. Now I have a vibration around 45mph, but nothing at lower speeds. I have tried rotating the drive shaft but I cannot seem to get rid of the vibration. Any ideas how I can re-balance the shaft or what I can do?
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Windog1
October 18, 2008.




Make sure U-Joints are seated all the way and if they are then you can find a drivshaft shop to reballance the driveshaft and if problem persists then rotate tires and see if it changes to front I have had some that after changing U-Joints still had shake and turned out to be tire ballance

Jnovack
Oct 18, 2008.
I'm interested to find out what method you used to replace the u-joints? The method used to balance a drive shaft isn't much different than wheel balancing. The old timers would use hose clamps to balance the shaft instead of getting another one. I can tell you the method if it comes to that. Depends on your budget I guess.
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Tiny
Autofixer2
Oct 18, 2008.
Not sure what the name of the method is, I simply removed the entire drive shaft from the truck by removing the 4 bolts on the rear axel, then loosing the old U-joint, then I slid the front part of the axel out of the transmission. I then had the drive shaft with both front and rear U-Joints + the short 12" yoke piece that went into the transmission on the bench. From their I removed the clips on the old joints and pounded out the old caps. I basically then followed the reverse process to put the new ones in. Ps, I did try to mark the drive shaft and transmissoins with chalk as recomended however it wore off durring the installation of the new joints.

Tiny
Windog1
Oct 19, 2008.
The reason I asked how you removed the u-joints was to find out if you used a hammer. You said you " pounded" it and if you did you most likely bent the drive shaft. It doesn't take much. I used a hammer years ago on a dodge dakota drive shaft and it displayed the same symptoms as yours. Drive line vibration only at certain speeds. That was before I was schooled and I can tell you I never did that again. Do you have a vise? You'll probably be doing the job again.

Tiny
Autofixer2
Oct 19, 2008.
I have a 1999 chev, just changed steady bearing and rear and middle u joint, now I have a vibration, does any body know what might be wrong, thanks

Tiny
Leodoyle
Nov 20, 2012.

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