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4a. Gearstar beefs up the GM design with a 300M hardened-steel input shaft that won't twist, ALTO Redline Racing bands that are 20-percent wider than stock and made from carbon-fiber, which resist slippage, a high load sprag, a 13-vane pump, extreme-duty springs, and a Corvette servo. At Gearstar, one technician assembles each tranny and then it's dyno-tested before it ships out to the customer. What's this all mean on the street? My truck barks Second gear like I'm kickin' the family dog and I can keep on throwing power at this tranny and it won't break.