I did and did get a replacement one way bearing and shaft from redcrap however that one failed within minutes. How can you have a 3.5cc anything rely solely on a one way bearing carrying the load. This one never made a 2nd gear shift. It tried then locked up all 4 wheels wide open lol.
I have this truck and same problems. It's the one way bearing on the 2 speed shaft. I drilled a hole and pinned the shaft so it's only 1 speed but it moves lol. Tried finding replacement gearbox. But unavailable.