I just bought an older 2003 gehl 7600 3200 hours. starts right up sounds good. Only issue is the right side is much weaker then the left. Low idle the left side turns on a dime great power. Low idle the right side will either barely turn or turn slow and then stop turning. When i push the throttle up to 80% or so both sides seem to have good power. The right side is a little slower but not as noticeable. Both sides will spin if I push into a pile of dirt at high idle. The right side just has very low power with the throttle set to 50% or less. Any suggestions or a place to start? Could it be the brakes on one side are on and it is fighting the brakes or is this a pump drive motor issue?