Thanks Roy, the gears seem fine, after I cleaned out the old lube and refilled with white lithium grease from Lucas. No binding that I can see when spun by hand. After my last comment, I looked at it and found a tire had come off, though I don't think that is causing this issue, seems electrical.
Anyways, I've been working since then to change them. Very tedious and frustrating to change. Have to disconnect motor, pickup wires and remove the trucks to get the side covers off. *Maybe* I could have done it without all that disassembly, but the manual said to do it that way. Jeez, what a PITA ! I cleaned up everything nice, new tires and put it on the shelf for the night, enough for today.
I wanted a smoking diesel, so I got this one. The price was right, but it only has the lead A and B unit. I did see another one in Da BAY for under 400$ with all three units and box etc. Next time, I'll go for a newer RK without the smoke I think , LOL