
VIN-matched programming and calibration using OEM-grade tools, whether you're replacing a module or resolving drivability issues.

From fault diagnostics to full module restoration, we repair transmission control units with precision. Every repair is backed by branded documentation and tested for real-world performance.

Need updated software or manufacturer recall programming? We offer ECU and TCM flashing services to bring your vehicle up to spec, improve fuel economy, and restore performance.
The Muff Shop aka Bud's Muffler
55 E.EDNA PL, SUITE A, COVINA, CA. 91723
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