I am here with your solution.
Either A; the transmission mount plate has shifted, this is the easier fix. Go underneath and loosen off the 3 bolts that hold your transmission to the crossmember until the nuts are at the bottom of the bolt. (May need to move skids etc) then push upward on the transmission itself and towards the rear, you may feel the transmission slightly move, or you may not notice it. Retorque the mount bolts. If you are frail, use a jack lightly.
B; if the above doesnt solve the problem, start looking at your engine mounts. If the c is bent on side or another you may have to either hammer it back into place or replace with new mounts.
Try the transmission first. Any slight bump and these jeeps will not be happy, slight fender bender is all that's required to shift the transmission