Vibration after rear main seal install

vicma762004 · Nov 14th, 2007, 06:56 PM

I took my 99 Pathfinder to get the rear main seal installed and when i got it back it would vibrate enough to make the loose change rattle loud. it vibated from 10 mph to 70 mph

I took it back he so called adjusted the driveshaft and the vibrating was less but still there at around 40 mph and 60 mph.

ok took it back two days ago and got it back yesterday and now it shakes worse then the second time.

could a bad driveshaft install be the rerason.

does it need to be balanced?

hod does one even go about balancing it?

Zilverado · Nov 14th, 2007, 08:10 PM

Is the vibration in the seat of your pants or in the steering wheel? If it's in the steering wheel, the problem is likely in the front wheels and/or steering components.

But it sounds as if it's coming from the rear. Could be one of the wheels threw a weight and is out of balance. If the drive shaft is out, it also may have thrown a weight. Balancing would involve bringing it to a shop that specializes in this. They remove the shaft and put it in a machine to spin it. They then weld small weights to the exterior of the shaft where required. You could save yourself some $$$ by removing and reinstalling the shaft yourself, but this would require some tools as well as a second vehicle to deliver the shaft to the shop.

It could also be that if the shop you took it to removed the shaft, they may have reinstalled it out of alignment with the transmision or rear differential. It has to be reinstalled in the same orientation as it was removed. If the rear wheels spin while the shaft is off, and it was not properly marked prior to removal, it might have gotten reinstalled out of alignment.

Just some thoughts.

vicma762004 · Nov 14th, 2007, 08:41 PM

well he has reinstalled it three time already. 1rst vibration bad 2nd vibration minimul 3rd vibration bad again.

how would this poor fool know if hes getting it right.

it suprises me cuz he has donr countless tranny work on my bros race truck with no problems.

tcrote5516 · Nov 18th, 2007, 08:34 PM

If they didnt mark the original relationship of the driveshaft to the trans, not allways but sometimes this can occur. You could get it rebalanced, or do a trial by error. There is (just rough guess) 20 different splines on the shaft to try...that could take a while.

vicma762004 · Nov 19th, 2007, 05:02 PM

well i took it somewhere else and the vibration comes from a bent center bearing wich was cause by the vibartion according to the tranny place. so thst 200 dlls.