[tipsmiller]

In the recent years (two years?) the fisher price gearbox has changed from the old design. The new ones have orange gears, the old ones have white ones. There are also different FP motors that are legal for first. The motors should be identical in mounting, but you need to be sure to have the right pinion gear pressed onto your motor-I believe the FP has either a 19-tooth or 12-tooth pinion by default.