(often referred to as a "POSI") came to be a popular option and Since the "Limited slip" or Locking rear end Wheel drives) right up until about 1982, these housings are by far the Many half ton trucks continued to utilize the 9-inch (both 2 wheel & 4 Gross Vehicle Weight ( GVW ) wouldĭetermine which axle housing many cars and trucks received. With 3/8" fine thread, while the larger bearing use 11/16" To the housing, the small bearing housings use 9/16" socket size nuts Small bearing housing can be differentiated from a large bearing housingīy the size of the nuts and thread used to retain the brake backing plates The Bronco’s from 1966 to 1977, they stayed with the 28-spline units. Most of the later trucksĪlso received the larger axle bearings housings. Trucks varied more, early half ton trucks got the 28-spline axles andĬarriers, while sometime in the early 70's the switch was made to mostlyģ1-spline axles and carriers for most trucks. Of course most desirable is the N case, first used on the 427 GalaxiesĪround 64-65 I believe.They are most often found behind the later 428CJĪnd 429CJ cars.From what I have seen don't expect to find them in 390 orĢ89 Hipo cars.The N cases went with 31 spline centers and are for ruggedĭuty.And believe it or not, they were also used in some FE equipped Ford Some of the heavier cars like the Galaxies also received the Exceptions to this were the ultra Hi performance Boss 302’s,īoss 429’s, 427’s, 428 CJ/SCJ and the 429 cars which received theģ1-spline carriers and axle shafts. Generally most cars received the small axle bearings and 28-spline axle It was not the only axle used, but was by far one ofīy Ford exist in the size of the outer axle bearings in the housings andĬarriers both, as well as with the spline count on the axle shafts.
The axle from around the 1957 model year right up until the early 1980’s
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