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The Jeep Wrangler (pictured is a TJ Wrangler) is a 4WD vehicle with a transfer case to select low-range or high-range four-wheel drive.. A four-wheel drive, also called 4×4 ("four by four") or 4WD, is a two-axled vehicle drivetrain capable of providing torque to all of its wheels simultaneously.
The transmission has a 7.05:1 ratio first gear, which is one of the lowest "granny" gears ever produced in a production transmission. It weighs 135lb, which is 40 pounds less than the SM465 that replaced it. While the construction is dated by modern standards, these are sought after by off-road enthusiasts due to the ruggedness and gear ratios. [1]
Freedom Drive II uses the same hardware as the FDI system but adds a lower axle gear ratio in conjunction with the CVT to simulate the benefits of a low-range transfer case, giving a 19:1 overall gear ratio for off-road use. This function is an alternate program in the CVT and is not a transfer case function.
Comparison between normal and portal axles Pinzgauer portal axle. A portal axle (or portal gear lift) is an off-road vehicle suspension and drive technology where the axle tube or the half-shaft is offset from – usually above – the center of the wheel hub and where driving power is transferred to each wheel via a simple gearbox, built onto each hub. [1]
1998-2002 Rodeo (Dana 44HD with thick cut ring gear and Dana 60 spline(29) and Dana 60 diameter pinion) 1993–1997 Rodeo (Honda Passport, Holden Frontera) 1994–1997 Rodeo (Honda Passport) Nissan 2004–2007 Titan (32 spline) 2008–Present Titan (35 spline) 2005–Present Frontier/Xterra NISMO, Off-Road, Pro-X models, and all manual ...
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 gears. Achieving an overdriven ratio for cruising thus required a gearbox ratio even higher than this, i.e. the gearbox output shaft rotating faster than the engine.
Crawl ratio is a term used in the automotive world to describe the highest gear ratio that a vehicle is capable of. Note that gear ratio, also known as speed ratio, of a gear train is defined as the ratio of the angular velocity of the input gear to the angular velocity of the output gear, and thus a higher gear ratio implies a larger speed reduction, i.e. the input speed is reduced more at ...
A Land Rover Defender 90 off-roading A Unimog U1600 off-roading 4WDs at Fraser Island beach, Australia. Off-roading is the act of driving or riding in a vehicle on unpaved surfaces such as sand, dirt, gravel, riverbeds, mud, snow, rocks, or other natural terrain.