drive train wearing out?

[gurellia53]

We're having some trouble with our drive train and launcher and haven't been able to determine the problem.

We were able to get an entire week of driver training in at the end of the build season, the first time ever for us. We pushed the robot hard (drove almost constantly, swapping batteries every 10 minutes or so then throwing them on the charger; only stopping when the CIMs got too hot) all week and never had a major issue and it was working great. However, at the Wisconsin Regional, we ended up with some major issues.

1) drive train didn't turn as well as it did in practice. We couldn't spin around in circles in high gear like we had been able to.
2) The robot didn't seem as fast sometimes. (posibly related to #1)
3) Sometimes the robot wouldn't move when I moved the joystick.
4) launcher (using 2 CIMs) worked well but couldn't throw it as high or as far as in practice.

We have kitbot 6wd with center wheel lowered. All IFI high traction wheels. Each side is powered by 1 CIM through an AM supershifter and a 1:1 sprocket ratio. The launcher is powered by 2 CIMs through a toughbox and an 11t chained to a 45t sprocket.

We have a list possible problems and solutions, but no one has been able to pinpoint anything specific.

Help is greatly appreciated.

Regards,
Andrew