All right guys, here's what's happening today. I had the guy at the hobby store fix the transmission on my mgt4.60, the first and sceond gears had stripped.we couldn't find the parts for awhile. Finally got it back today it ran great for 2 tanks of fuel and then it acted like it was slipping. So I took it out and apart and found the shaft that gears ride on was snapped at the pin. What would cause this to happen. I took it easy because I was scared to break it again, just driving around the yard it was at the hobby store for 2 months I just wanna burn some nitro