Drive Train wheels not moving together.

The drivetrain on our robot has the wheels on the right going faster than the wheels on the left. Is there any way to correct this? We did not program it to do this. It just started happening. Thanks!

What language? Can you post yout program?

We had a weird motor issue toward the end of the season too and it was resolved by calibrating the controller. I had also been told a ways back that when one side is running in reverse, it will cause that side to have slightly less power. Good luck!