YHC70007 Yukon Locking Hubs for '79 and up GM Dana 44 and '66-'77 Ford Bronco This is a D44-19 locking hub kit assembly. This assembly fits 79 & Up GM 8.5 Front, 66-77 Bronco D44 & many custom D44 applications w/ 19 Spline stubs. (includes 2.5, 4.0 & 6.0mm spacers)