In anticipation of marketing the 71 XJ6, I investigated an apparent inability to move the car, either forward or backward from its current location.
I jacked each front wheel off the ground and was able to rotate both wheels in either direction. However, with a rear wheel off the ground, neither one would turn. However, both wheels would move a few degrees either clockwise or counter-clockwise, and at the end of its travel, appear to “bounce” off an impediment. I think, but am not certain, that I have experienced this same feeling when attempting to turn the rear wheels when the transmission is in neutral.
The gear shift in the cabin is diffenitely in neutral.
Could I have done something to the gear shaft when turning the engine crankshaft forward and backward?