[quote=Teched3;902279]
The most difficult problem(s) you will have is removing the pinion gear and reinstalling a pinion gear that fits the P60 transmission. Get a pinion puller similar to one at this link. Other designs are also available at most hobby shops:
Other threads identify that these small pinion pullers are not quite up to the task of pulling the pinion off the Fisher-Price. The small pinion pullers are primarily for removing the brass pinions from RC cars and planes. The F-P pinion is much longer, and pressed more tightly onto the shaft.
We use a slotted steel plate which fits between the pinion and the motor, and is supported by the arbor press base - then use a shortened pin punch with the arbor press to to push the motor shaft through.
Be sure to support the lower end of the motor shaft when you push the pinion back on. If you just clamp onto the motor housing and try to push the pinion on the shaft, it will likely damage the bearings.