A Transfer Case is a fundamental part of the 4-wheel drive system on your 2003-2007 Ford F250/350. 4-wheel high is used in high-speed settings such as dirt or snow, whereas 4-wheel low is used in low-speed settings like steep rocky hills where maximum wheel torque is required. Transfers cases typically have two 4-wheel drive settings, a high and low gear ratio for different situations. The transfer case in a 4-wheel drive system is responsible for transferring power to both the front and rear axles. Bolted to the back of the transmission, a transfer case has two driveshafts connected to it that run to each axle. Contained inside the transfer case is a set of gears and chains that are engaged or disengaged depending on the drive mode selected.
The Transfer Case is designed to be used in off-road or low-traction situations and is not recommended to be used on dry pavement where wheel slip is not possible. In some applications an external brace can be added to increase the structural rigidity of the transfer case to prevent damage from high torque loads or twisting. Wheel slip is possible in loose terrain, alleviating any binding that can occur on dry pavement. A Transfer Case typically does not require internal upgrades or modification unless the vehicle will be used for extreme off-roading or racing applications. Shop XDP's large selection of Transfer Case products from the top brands such as Merchant Automotive, PPE, Sun Coast Converters, and Dorman. When you shift the Transfer Case into 4-wheel drive, it locks the front and rear axles together so that they spin at the same speed.