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3 The Gearstar 700-R4 is a completely remanufactured and upgraded trans that comes with just about everything you need to install. A technician at Gearstar will ask a bunch of questions about rearend gears, horsepower of the engine, and rear tire size when ordering so the company can make sure the shift points and the speedo will be spot-on. The other main component in the trans portion of the swap is the crossmember from Chevy 2 Only. It is a true bolt-in piece and places the trans in the right spot to hook up to the motor.