I've got a Navico/Simrad tp10. It works fine until it extends all the way then it won't retract. I can duplicate the problem on the bench. The drive gear on the end of the motor shaft moves out on the motor shaft 1/8 to 1/4 ". The motor shaft then just spins inside the drive gear. There's no set screw or key way. From what I can glean from the manual I found online. http://www.bluemoment.com/manuals/01 TP10-20.pdf they glue the gear on to the shaft. I'm troubled due to the fact I don't think anything will adhere with all the lubricant inside the housing. Anybody dealt with this? Thanks