When going forward it will lurch forward very hard and sometimes not go at first then it will jerk real hard and go...when going forward for a little while sometimes it will stop moving forward then i push the pedal in reverse and it goes backward fine when returning to the forward position it then goes forward. when at an idle the tractor doesn't seem to want to move at all...if i hold the pedal forward and accelerate the throttle it kicks in and goes...the fluid level is ok.