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Axle shaft diameter 1.41” Front (32 spline) 1.46” Rear (32 spline) 1.50” Front (35 spline) 1.50” Rear (35 spline) Inner axle shaft splines: 16, 23, 30, 32, 33 or 35 Aftermarket inner axle shaft splines: 40 for after market, high performance axles, equivalent to Dana 70 components; Pinion shaft diameter: 1.625" Pinion shaft splines: 10 or 29
The "highboy" 4x4 were fitted with 3-inch width 5-leaf (or 6-leaf) front springs; the rear suspension was 2 + 1 ⁄ 4-inch width 9-leaf springs (in contrast to the 3-inch width springs on other F-series trucks); to raise the rear ride height, the rear axle used a 4-inch lift. [18]
The Dana 70 rear axle was first used in the Dodge W300 in 1958. The Dana 70 started out using 10 spline pinions and 23 spline axle shafts. The later, more current, Dana 70 axles use 29 spline pinions and 32 or 35 spline axle shafts. Dana offered two different limited slip differentials with the Dana 70, the "Powr-Lok" and the "Trac-Lok."
Ford released an updated version in both solid and IRS form for 2015+ Mustangs and F-150. The most apparent difference is a 12 bolt cover instead of the traditional 10. The super 8.8 also uses larger bearings,longer pinion with larger nut, and most significantly 34 spline axles or half shafts.
For model year 2000 - 2004 trucks, the F-150 7700 offered this axle and the F-250 light duty was discontinued. At least till 2011 the 12 bolt semi float was still found with the heavy duty f-150. Gear ratios were 3.73 in 4x4 and either the 3.73 or 4.10 in the two-wheel-drive models. This was available in both limited slip and standard variations.
It can be identified by its straight axle tubes, 10 bolt asymmetrical cover, and a "80" cast into the housing. Dana 80's are made as full floating, rear axles only and are a step up in overall strength compared to the Dana 70. 1988 Ford was the first company to use the Dana 80.
The F-150 used a light duty Dana 44 TTB. From 1980 to 1984, the rear axle was typically a Ford 9-inch axle, with the Ford 8.8 axle being phased in gradually; the 9-inch ended production (alongside this generation) in 1986. The F-250 used an 8 lug version of the Dana 44 TTB called the Dana 44 TTBHD with the Dana 50 TTB being an option.
The ninth generation of the Ford F-Series is a lineup of trucks that were produced by Ford from the 1992 to 1998 model years. The final generation of the F-Series to include a complete range of trucks from a half-ton F-150 pickup truck to a medium-duty F-800 commercial truck, this is the third generation of the F-Series body and chassis introduced for 1980.