This coupling shaft forms part of the differential, connecting the driveshaft and the front differential.Front differential to propshaft replacement coupling shaft.Using this new coupling shaft will enable you to replace just the propshaft and coupling shaft and leave the differential in place,reducing both time and the differential need not be removed from thefront end so the coast is reduced.Common problem with the coupling shaft spline wearing between frontpropshaft and front differential, loosing drive to the differential
