B&M Adjustable Modulator - GM TH350/TH400 Automatic Transmissions PANTS Country of Origin US Sold

Country of Origin US Sold As Kit Availability Available Universal No Drive 2WD Max Tire 33

1040281 required for first time replacement of Injectors for engines with a serial numbers less then 56462598

Cast from High Silicone Ductile Iron

Our Larger than stock 3

Flow matched

B&M Adjustable Modulator - GM TH350/TH400 Automatic Transmissions PANTS Country of Origin US SoldThe B&M vacuum modulator is fully adjustable and allows you to fine tune your shift points and shift feel. This is done by turning the adjustment screw inside of the vacuum line connection for more or less diaphragm preload, thus raising or lowering part throttle shift points and line pressures. For GM TH350 and TH400 automatic transmissions.