Hey guys I have a new toy a fg buggy with 2speed. I was running it today for the first time and heard like a grinding noise on full throttle. U can barely hear if u do it slow but when u hit the throttle all the way it looks like something is grinding. I took it all apart and saw that the both gears are spinning in both direction freely. So I figure it was the one way bearing. Took the bearing out and tested it but it's only spinning in One direction. Could it be the shaft? Found a missing thread pin the one that's hold it to the shaft not the one that's out a few mm. Thanks