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The Gama Goat was a six-wheel drive semi-amphibious off-road vehicle originally developed for use by the US military in the Vietnam War.The Goat uses an articulated chassis, so that from distance it appears to be a four-wheel drive vehicle pulling a two-wheel trailer, but it is a single six-wheel vehicle with a four-wheel steering arrangement with the front and rear wheels turning in opposite ...
Differential is emptied by removing the final drive cover on the rear of the transmission or by vacuum extraction through the speed sensor hole. Vacuum extraction is the more attractive option since a paper gasket seals the steel cover and access is very difficult. Filling is through the speed sensor hole. Differential oil capacity is about 1 ...
A relatively simple design of differential is used in rear-wheel drive vehicles, whereby a ring gear is driven by a pinion gear connected to the transmission. The functions of this design are to change the axis of rotation by 90 degrees (from the propshaft to the half-shafts) and provide a reduction in the gear ratio .
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.
Calculating the front and rear sprung weight transfer will also require knowing the roll couple percentage. The roll axis is the line through the front and rear roll centers that the vehicle rolls around during cornering. The distance from this axis to the sprung center of gravity height is the roll moment arm length.
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.