Big Boy Transmissions


For decades, the Big Boy has been the stable in many big name drag cars. With any new innovations, including the brand new forged and in house CNC machined cases, the Big Boy continues to be the top transmission chosen in Top Alcohol Funny-Car, Dragsters and Pro Modified cars. But new uses keep finding the B&J advantage, including quick brackets cars, Monster Trucks, Tractor Pulling, Mud and Sand Drags. Available in multiple speeds, and numerous gear ratios to customize to your unique vehicle. Currently available in many stages including the ultra-duty and triple sprag unit. The favorite of big names like Bucky Austin, Pat Austin, Doug Gordon, Josh Hernadez Pro Mod drivers  and many others.

B&J not only makes and supplies these transmission units, but also the necessary safety items, couplers, splined shafts, hardware, and everything needed to run. Give us a call and let us set you up right, the first time.