Can anyone tell me what might be causing my transmission to lag/slip in 1st and 2nd gear, espcially in 2nd? When I hit about 2K RPM if feels like my transmissoin stops pulling and the Jeep slows down, then all of a sudden it catches and starts jolting the Jeep back and forth. Transmission fluid is full and clean. Any ideas? Also have some synchro noise, not sure if that has anything to do with it either. Thank you in advance for your help!