Fit Note: 137"/3480MM Wheelbase, 142"/3607MM Wheelbase, 158"/4013MM Wheelbase, 172"/4369MM Wheelbase, Narrow Frame (Chassis Cab), Electric Trans Case And Auto Hubs, Man Transfer Case And Man Hubs, M/Beam With Extended Axle (Fatboy), With Monobeam Suspension - Narrow, With Monobeam Suspension - Wide