Subaru offers what’s known as a permanent all-wheel drive, meaning all four wheels are driven at all times. Competing systems often disconnect the front or rear axle when extra traction isn’t
Drive Axles and Driveshaft. Drive axles connect the car’s wheels to the differentials while allowing the wheels to move according to the road’s contour. Driveshafts are rods connecting the differentials to the engine. It’s important to understand how these 4×4 components work, more so if you are converting a 2WD to a 4WD.
Transfer case is the part connected after the transmission box of 4 wheel drive/ All wheel drive vehicle, which transfers the power from the transmission to the front wheels and rear wheels. In other words, the transfer case connects the front propeller shaft and the rear propeller shaft to the transmission output shaft.
Four-Wheel Drive. Four-wheel drive is the system used in older vehicles, and some current Jeeps and trucks. Originally these system had no center differential, with the power from the transmission fed into a transfer case, which sent equal power to the front and rear differential and wheels.Torque is ramped down to the front wheels. The process would repeat if rear wheel slip is detected again. The NVG 246 EAU transfer case has the added feature of also providing the driver with 3 manual mode/range positions: • 4HI - 4 Wheel Drive high range • 2HI - 2 Wheel Drive high range • 4LO - 4 Wheel Drive low range