TCI Max Shift synthetic transmission fluid was designed with heavy-duty and performance applications in mind. This product will run cooler, prevent excessive wear, and reduce internal friction. Moreover, intervals between fluid changes can be extended, since the fluid resists breakdown much better than conventional oils. For the competitive racer, this translates into quicker lap times and lower ETs. Tow vehicle and RV owners will benefit from increased transmission life, reduced maintenance, and improved mileage. Max Shift STF is compatible with conventional oils, allowing users to simply drain their existing fluid and replace it with STF. This fluid is fortified with special additives to prevent metal-to-metal contact during shock loads, improve fluid cling, eliminate foaming, and prevent transmission seals from hardening and cracking.