New aftermarket gear for John Deere compact tractor models 655, 670, 755, 770, 790, 855, 955; garden tractor models X585, X595, X728, X748 and front mount mower models F1145, 1600, 1620. Replaces John Deere part number M805260. This gear is located at the outer position on the horizontal shaft of the 4WD axle.