B&M Street and Strip Transmissions 117308

Gear ratio is the standout number on this B&M Street and Strip automatic: a 3.06 first gear, built into a remanufactured 4-speed unit on a Chevy bellhousing pattern. A 30-spline input shaft in hardened steel and a slip-on output yoke round out the drivetrain-facing specs.

What's rebuilt versus what you still add

As a remanufactured unit sold individually, this transmission arrives without a torque converter, flexplate, controller, wiring harness, cooler, or trans-brake, so budget for those separately based on your build. It's rated compatible with a lockup-style converter, and the valve body runs a standard, forward shift pattern rather than a manual-shift race layout.

Case and pan details worth knowing

The case itself is aluminum with a black finish, paired with a steel pan in a natural finish and a stock-profile pan design rather than a deep performance pan. Fluid fills through the case, and no transmission fluid or dipstick ships with the unit, so plan to supply both before it goes in. As with other remanufactured units, confirm your specific vehicle year and engine pairing with us before ordering to make sure the bolt pattern lines up.

Common questions

Is a torque converter included? No, that's sourced separately to pair with this unit.

What's the first gear ratio? 3.06:1.

Can I run a performance shift kit instead? As shipped, the valve body is set up for a standard forward shift pattern.