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- Regulate your transmission shifts with a B&M Transmission Modulator
- Fully-adjustable to tailor your shift points within a range of 2-4 mph
- Comes conveniently pre-adjusted for normal shift points
- For use with your GM TH350 or TH400 transmission
- Your B&M Transmission Modulator is backed by a 1-year limited warranty
Enjoy improve engine vacuum with a premium BM Transmission Modulator. For use with your early model GM TH350 or TH400 transmission, these fully-adjustable modulators allow you to tailor your shift points within 2-4 mph. Comes pre-adjusted for normal shift points. 1-year limited warranty.