7. My Raptor can only go in one speed (high or low) regardless the switch position.

Do a Gearbox Test

If gearbox is no good, you need to replace the gearbox. Click here for detail.

If the gearbox is good, you may have a bad high/low speed switch.

Do a High/Low Speed Switch Test

If the high/low speed switch is no good, you need to replace the high/low speed switch. Click here for detail.

If at the last step of high/low speed switch test, the unit still does not move, you need to replace the controller box and main wire. Click here for detail.