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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 that it is relatively compact width (when viewed along the axis of its input shaft).
Csonka transaxle from 1908 Drawing of the "Alfa Transaxle" layout, with gearbox mounted in block at the rear differential; also inboard brakes to reduce unsprung mass. A transaxle is a single mechanical device which combines the functions of an automobile's transmission, axle, and differential into one integrated assembly. [1]
The 9.5-inch C-clip rear differential was featured in both the Suburban and pickups, available in 6- or 8-lug variations, employing 33-spline axles. This differential remained in production through 2009 and even found use in vehicles like the TrailBlazer SS, Saab 9-7X, and SSR.
A 1.5-way differential refers to one where the forward and reverse limiting torques, Trq d_fwd, d_rev , are different but neither is zero as in the case of the 1-way LSD. This type of differential is common in racing cars where a strong limiting torque can aid stability under engine braking.
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.
All Dana 70 rear axles are full floating and typically have a gross axle rating of 7,500 lb (3,400 kg). 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.
The rear wheels are located transversely by top links and wheel carriers (green) and lower links (cyan). The top link is the driving half-shaft with a universal joint at each end. The lower link pivots adjacent to the differential casing at its inboard end and where it meets the wheel carrier at the wheel hub casting (violet) at its outboard end.
The OEM Limited slip differential originally was a "Power Lok" until 1998 when the "Trac Lok" phased it out. Trac Loks were a US$350.00 option with Ford Super Duty trucks. [ 1 ] The Dana 80 Trac Lok is unique being it is a 4 pinion unit, unlike other Dana Trac Lok units with 2 pinions.