Hi All,
I have chevrolet Lumina S 2003 coupe , 3.8Liter V6 there are some problem i am facing which i wanted to check with you guys, it an automatic transmission and when the car is at rest and i put it to drive i feel a jolt what it could be ? also when i accelerate i feel some vibration in body for about 3 sec and when the gear changes automatically to second and so on then the vibration is gone, it only comes when i accelerate ,when car is running on 120KM/hr its very smooth i have recently changed all the bushes of control arm and one motor mount was also weak so i have replaced that one as well... also differential fluid and transmission fluid has also been recently changed now no idea what it could be is it a
1) unbalanced gear shaft ?
2)transmission ?
3)differential ?
4)U- joints of shaft?
your expert advice will be appreciated!