How much movement of the carrier bearing within the rubber mount is considered acceptable when one applies lateral forces to the driveshaft with one's hands. I am not certain but feel that the bearing (and thus the shaft) maby be moving too much. Visually the rubber mount appears in good shape but when I apply force to the drive shaft it moves perhaps as much as an 1 inch. Also, if I rapidly accelerate in reverse there is a heck of a vibration on initial movement. (only with high torque acceleration as a test methodology). Nothing like that in forward acceleration.