TCI Max Shift break-in transmission fluid is the perfect solution for guarding against heat build-up and wear during the critical 30-minute break-in period and initial drain of your automatic transmission. Like all Max Shift fluids, the break-in fluid was developed using ultra-pure base oils that resist viscosity breakdown and contain all of the necessary friction eliminating, anti-foaming, and extreme heat additives. No other additives are required, and it is compatible with other brands of ATF (synthetic and conventional). No flushing is required after draining. This fluid works in most automatic transmissions and exceeds GM Dexron III and Ford Mercon specs. After the initial break-in period, TCI strongly recommends replacing this break-in fluid with one of the other Max Shift transmission fluids that fit your application.