I recently had a motor swap done and i put about 1500 miles on the motor without any tranny problems, then it started to grind at high rpm in 3rd and 4th gear and wouldn't go into gear sometimes. i was wondering what the cause was? Its strange that it didn't grind right when i first got the swap done then after 1500 hundred miles???????? help?

 

Check the tranny fluid. make sure nothing is bent i.e the shift linkage