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The Dana/Spicer Model 70 is an automotive axle manufactured by Dana Holding Corporation and has been used in OEM heavy duty applications by Chevrolet, Dodge, and Ford. It can be identified by its straight axle tubes, 10 bolt asymmetrical cover, and a "70" cast in to the housing, which is visually similar to the Dana 60. The majority of the Dana ...
Its nomenclature, "14-bolt," represents the 14 bolts securing the differential cover, although the ring gear itself is fastened by 12 bolts. Notably, the 14-bolt differential gained traction among Jeep Wrangler owners seeking axle replacement options, [2] earning the moniker "corporate" 14-bolt because of its association with GM's corporate ...
Corporate 10-bolt axles were upgraded to 30 spline axle shafts from previous 28 spline shafts in 1989. In addition, the standard L05 5.7-liter V-8 now had one serpentine accessory drive belt in place of the older multi-belt accessory drive setup. 1989 was the first year for the NP241 transfer case and also the only year for speedometer cable ...
The 2nd Generation axles were driver's side with ball joints. 30 spline axle shafts were used instead of 35 splines, except 2000, 2001 and 2002 models which were equipped with 32 spline axle shafts. GM versions are passenger side differential drop, standard rotation gears, kingpin knuckles and 35 spline axle shafts.
The original short-wheelbase 90-inch (2,286 mm) and the new long wheelbase 108-inch (2,743 mm) vans came with a 5 × 4-3/4" lug bolt pattern. An addition for 1967 was the G20 heavy-duty 3/4-ton version. The G-20 featured heavier suspension, a 12-bolt rear axle, and increased hauling capability with wheels having a 6-lug bolt pattern.
The Z/28 also came with upgraded suspension, power front disc brakes, a 4-speed Muncie close-ratio manual transmission and a 12-bolt rear axle. Posi-traction was optional. Wide racing stripes on the hood and trunk lid could be deleted at no charge, '302' front fender emblems came on the 1967 and early 1968 cars, 'Z/28' emblems in the late 1968s ...