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GMC All Terrain concept truck with 11.5 AAM axle. The 11.5 AAM 14-bolt rear differential started replacing the 10.5" 14-bolt in Chevrolet Silverado and GMC Sierra trucks from the 2001 model year onwards. However, the 10.5" 14-bolt axle remains in production today, specifically utilized in GMC Savana and Chevrolet Express vans.
The Dana Super 70 rear differential has become a staple axle for GM and Ford in the dual rear wheel chassis cab vans since 1999. The ring gear is larger at 10.75 inches and features 37 spline axle shafts. Only 2 OEM gear ratios are offered: 4.10 gears and 4.56 gears. [1]
Dana differential case #706400 [3] (3.07-3.73) shows in Dana's parts catalog to be Dana 61-specific [citation needed]. The 706040x carrier can be purchased relatively inexpensively and used to install lower gears in a Dana 61 axle, such as when replacing a broken or damaged Dana 60 with a Dana 61 while retaining the factory gear ratio.
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 Truetrac is most often used in the front axle of 4x4 pick-up trucks intended for off-road use, in combination with locking center and rear differentials. As is the case with all geared LSD designs, the Truetrac does not have any negative impact on steering that most other LSD and "locker" designs are prone to.
The GM 9.25 IFS has been the main front differential in Four-wheel drive 3/4 Ton and 1 Ton GM trucks since 1988. The Dana 60 solid axle front end was used selectively in trucks with a higher GVWR from 1988 to 1991. The original Saginaw 9.5 differential, ring and pinion were modified to work with the independent front suspension.
The Dana 44 rear axle first saw use in the 1940s and is still in use today. The Dana 44 has a GAWR up to 3,500 lb (1,600 kg) and is a semi-floating type, having one bearing on the end of the axle shaft which carries the weight of the vehicle on the axle and also allows axle rotation.
An epicyclic differential uses epicyclic gearing to send certain proportions of torque to the front axle and the rear axle in an all-wheel drive vehicle. [ citation needed ] An advantage of the epicyclic design is its relatively compact width (when viewed along the axis of its input shaft).
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