Im working on a John deere sx 85 the person said it ran ok when put away for winter now it wont drive eather forwards or reverse I check and replace the trans axle belt but to no avail I also disengaged the barke and checked all out , the transaxal pully spins and the brake plate runs but no transfer to wheels I can hear it engage when shift lever is moved. looks like Im going to have to drop the unit of I dont get help thanks ED