I read cl10Greg post on the same topic here, https://www.lawnmowerforum.com/threads/lt42-xt1-not-moving.58640/#post-356142.As Riverts stated I checked the belt, idler pulleys, tight tensioner arm, and verified that there was no debris caught inhibiting the movements of any of the former. Everything engages and moves when i left the rear end, but not when the tractor has the rear wheels on the ground. Is this the transmission? Model # 13AOA1CS010. Thank you.
Make sure keys are in rear axle keyway after pulling wheels. Is tractor still under warranty? What year is tractor? How many Hours on Hour Meter? Is transmission drive belt in need of replacement? Make sure transmission rod at backside of tractor is pushed in all the way. Read through manual above, let us know how it goes, thanks, Mark