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In automotive design, an F4, or front-engine, four-wheel drive (4WD) layout places the internal combustion engine at the front of the vehicle and drives all four roadwheels. This layout is typically chosen for better control on many surfaces, and is an important part of rally racing, as well as off-road driving.
The powertrain layout of a motorised vehicle such as a car is often defined by the location of the engine or motors and the drive wheels.. Layouts can roughly be divided into three categories: front-wheel drive (FWD), rear-wheel drive (RWD) and four-wheel drive (4WD).
R4 layout, the engine is located behind the rear axle. In automotive design, an R4, or rear-engine, four-wheel-drive layout places the engine at the rear of the vehicle, and drives all four roadwheels.
The BW1339 added a 2.57:1 low range gearset to the BW1305, enabling 5 modes: 4WD Hi Locked, 4WD Hi Open, Neutral, 4WD Low Open, and 4WD Low Locked. The Jeep Quadra-Trac was differentiated from the open "New Process" Gear NP203 used by Dodge , General Motors , and Ford in that it included a center limited slip differential feature, in this case ...
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.
RR layout. In automotive design, an RR, or rear-engine, rear-wheel-drive layout places both the engine and drive wheels at the rear of the vehicle. In contrast to the RMR layout, the center of mass of the engine is between the rear axle and the rear bumper.
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It can be removed using specialized shop equipment. Individual batteries are then serviced and replaced from the open top of the module. The battery layout inside the box is not the same for the Lead-Acid and NiMH battery type. The Lead-Acid setup is using 39 x 8V batteries setup on two layers. The NiMH setup is using 25 x 12V batteries on one ...