- Sale!New take off gearbox side, 20 spline yoke. This fits on large gearboxes output shafts. 20 spline yoke partially machined to accept a protector ring. This is the forward most yoke on the REAR driveshaft. Works with 398 U joints. found on Vtwin rear driveshafts. Part number 715900129 replaces 705501373 and 715900234