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With the early development of cars and the almost universal rear-wheel drive layout, the final drive (i.e. rear axle) ratio for fast cars was chosen to give the ratio for maximum speed. The gearbox was designed so that, for efficiency, the fastest ratio would be a "direct-drive" or "straight-through" 1:1 ratio, avoiding frictional losses in the ...
The transmission and final drive might be separate and connected by a driveshaft, or they might be combined into one unit called a transaxle. The gear ratios in transmission and final drive are important because different gear ratios will change the characteristics of a vehicle's performance.
The final use of the 3.272 final drive ratio (Part 38100AB740) was in the 2009 Legacy 3.0R Limited sedan (but not the regular R sedan), the 2009 Outback 2.5XT Limited (but not the regular XT), and the 2009 Outback 3.0R Limited (but not the regular R or LL Bean). The first use of the 3.083 final drive ratio (Part 38100AB730) was in the 2007 ...
One disc is the input, and the other is the output. Between the discs are rollers, which vary the ratio and transfer power from one side to the other. When the rollers' axes are perpendicular to the axis of the discs, the effective diameter is the same for the input discs and the output discs, resulting in a 1:1 drive ratio. For other ratios ...
It provides final drive reduction ratios ranging from 2.88:1 to 4.55:1, depending upon the Jaguar model. The bolts that attach the differential to the subframe have small holes through their heads so that they can be safety wired to prevent them coming undone, which would otherwise be difficult to detect since they can only be accessed when the ...
A cutaway view of an automotive final drive unit, which contains the differential. The final drive is the last in the set of components which delivers torque to the drive wheels. In a road vehicle, it incorporates the differential. In a railway vehicle, it sometimes incorporates the reversing gear.
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In Drive at full throttle, it would upshift from low gear to high gear at 60–65 mph (97–105 km/h). Under light throttle, depending on the final drive ratio, it might upshift at 10-15 mph. From 1964-1967, Buick and Oldsmobile versions of this transmission used a torque converter with a variable-pitch stator called Switch-Pitch (by Buick) or ...