i was just curious where this is because i changed my u-joint's and didnt pay attention to where the weight goes or was so aany help will be appreciated.
Jason

 

It's important that the weight is installed in the same location as it was pulled. You will feel vibration if it is not. If you're not sure, test drive it, remove and rotate the driveshaft in one direction or another, then go out for another test drive. Do this until you have removed as much of the vibration as you can. If the weight is installed 180 degrees to the original, the vibration will be very bad. Sometimes changing the u-joints may require a re-balance to remove all vibration.

 

but i dont know if it was on the back or if it was on the front of the driveshaft. that is what im looking for that way i dont have to play any games but i guess ill have to just turn it around and see what happens. but any more help will be appreciated.
Jason

 

I'm not saying this is in every case, but usually there is a weight (bigger) on the front of the driveshaft and then a smaller one on the rear 180 degrees from the one on the front. Look for a spot on the driveshaft where the weight might once have been either on the very front or the very rear of the driveshaft.

(front) ...................................... (rear)
WWW
_______________________________
_______________________________
.................................................. ..... WW

(isn't my illustration awesome!!)

The weight on the front should go into the transmission in the same location that the weight was removed. If the weight was on the top of the driveshaft when removed, it should be on the top when re-inserted. Same with the weight on the rear. Don't spin the rear-end, or mark the location of the weight on the pinion yoke prior to removal. If you're not sure where they were when removed, it becomes trial-and-error by rotating the driveshaft through all the teeth in the transmission.

I don't know if I'm answering your question or just rambling on......

 

I got the same problem!!! I had my driveshaft shortened and balanced when I switchout my 10bolt rearend and put the moser 12bolt. Now it vibrates ALOT at 65miles/hr and more. But I have no idea where the weight was when I removed the 1st time. I guess I'll have to trial and error unless anybody has anyother ideas. I was going to get it in to rebalance it with the ujoint on there.