The 31 spline axles 129 inches in diameter are more. The 88 inch is 30 stronger than the 7 12 inch and can be used reliably in 300hp or better vehicles.
1983 Ford Bronco 8 8 Axle Picture Supermotors Net
8 8 rear end width. The weakest points of the 88 are the 28 spline axles 118 inches in diameter. The cover is not quite square measuring about 10 12 inches high by 11 inches long the 7 12 inch rear end uses a cover that measures 10 916 inches square. Common dimensions and weight. There are 24 different fords that offered the 88 rear axle. Ring gear diameter 88 inches axle tube outside diameter 325 inches axle tube wall thickness 025 inches or 0188 inches axle diameter 1320 inches axle spline count 31 splines assembly width 59625 inches assembly weight 175 pounds approximate assembly width after narrowing. Ford ranger 88 5675.
A 10 bolt rear cover with 716 inch bolts is the easiest way to identify this unit. When ford introduced the 40 v 6 into the ranger in 1990 it came with a 88 inch 28 spline rear axle. Explorer 88 rear axles are 1 wider per side than a ranger or aerostar with a 75 rear axle. 40 liter rangers use a wider 88 rear axle and 10 drums. The ford 75 inch axle was standard on the non 40 v 6 models. The base rear end in the ranger has been the ford 75 inch.
Not all ford rangers came with 88 inch rears. Ford explorer 88 narrowed w2 short side axles.