Correcting Vibration at the Transmission Tailshaft

First-order driveline vibrations that originate at the transmission end of the propeller shaft are rare. If the tailshaft of the transmission is vibrating, inspect the tailshaft housing bushing for wear or damage. A leaky transmission tailshaft oil seal indicates bushing problems.
Feel for vibration at the crossmember underneath the transmission mount. If there is no vibration, the transmission mount is functioning properly by isolating the vibration from the structure of the vehicle. The transmission mount is therefore probably not the cause of the vibration.

Use the following procedure if you can feel vibration on the crossmember and the tailshaft bushing, and if the transmission output is normal:





1. Measure the propeller shaft runout. If the runout is excessive, replace the shaft with one that has acceptable runout. Alternatively, sublet the shaft to a reputable independent service shop in order to have the shaft rebalanced and the runout corrected
2. Test drive the vehicle. If the vibration is still unacceptable,balance the shaft on the vehicle.