B&M Street and Strip Transmissions 118002BM

Part number 118002BM in B&M's Street and Strip line is built around a lower, 2.48 first gear ratio than some other units in this family, inside the same remanufactured 4-speed, Chevy-bolt-pattern automatic case. It ships ready to pair with an HGM "Comp Shift" controller for transplant-style builds using electronic shift control.

What the remanufacturing covers

The front pump is rebuilt and the valve body is recalibrated as part of the remanufacturing work on this unit, with a hardened steel input shaft and a slip-on yoke carried through to final assembly. It's sold individually rather than bundled with a converter, though the design accepts a lockup-style unit when you choose one.

What you'll still need to add

A torque converter, flexplate, transmission controller, wiring harness, cooler, and trans-brake are all left out of the box, along with transmission fluid and a dipstick, since fluid fills through the case rather than a separate reservoir. The case is aluminum in a black finish, with a steel pan in a natural finish, following a stock pan profile rather than a deep performance design.

Common questions

What's the first gear ratio on this one? 2.48:1.

Will it work with a Comp Shift controller? Yes, it's noted as compatible for transplant applications.

Does the front pump get rebuilt too? Yes, the front pump and valve body are both part of the remanufacturing work.