Toughen your Sierra up for off-road performance with our Sierra transmissions and transfer case upgrades. The transfer case on your pickup has a very important job, and that job is to transfer power from the transmission to both the front and rear of your pickup truck. Your Sierra's transfer case selectively gives power to just two of the wheels sometimes and all four of the wheels in other instances. It accomplishes all of this through gears, chains, splines and other complicated parts. The transfer case that come stock on your Sierra is a sturdy piece of equipment, but it can't withstand the extreme pressure that oversized tires and maximum torque in off-road situations can apply to it. In those instances it's pretty common to damage the gears of the transfer case or some of the splines. That's why we offer upgraded Sierra transfer cases and also replacement parts for transfer cases. If you're truck stops switching between 2WD and 4WD effectively, or you feel like you aren't getting the power you once did and you hear some grinding, it's likely the transfer case is damaged. Use our replacement parts to fix it and to toughen it back up. At American Trucks we have the gear you need for your Sierra transmissions and truck differentials and to restore proper function back to your drivetrain. Whether you're going off-roading or not, you're going to want a properly functioning transfer case. Otherwise you can't access 4WD in rough driving conditions, which is one of the most important functions of a pickup truck. Keep your transfer case in good condition and you'll enjoy a more dependable vehicle overall as a result.
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