on my crawler when you put in reverse ,you go forward, when you put it in 1,2,or 3 you go reverse. i think the transmission and differentail has been changed. wonder if anyone else has ever run in to this?
Most likely the differential was put in with the gear on the wrong side. (flipped)
Or your crawler has an auxillary trans with it shifted in reverse.
Ray
If it has the orginal 3 speed gear case it is put in on the wrong side of the pinion like Ray says