If your transmission is sending up smoke signals, then there could be a problem with your modulator. Replace old factory preset models with TCI adjustable vacuum modulators. These transmission modulators are available for several applications and allow you to fine-tune your shift points and shift feel. Simply adjust the screw inside of the vacuum nipple for more or less diaphragm preload. Your transmission relies on the vacuum modulator to function properly, and you can rely on TCI and their adjustable vacuum modulators for renewed performance and the ability to slightly raise or lower part throttle shift points and line pressures.

More From This Category

RTS OE Speedometer Gear, For GM, Powerglide, TH350, Most Manual, 17 Tooth Driven, Each

RTS OE Speedometer Gear, For GM, Powerglide, TH350, Most Manual, 17 Tooth Driven, Each

$31.75

TCI GM Transmission to For Chrysler 392/354 HEMI 8-Hole Adapter Kit.

TCI GM Transmission to For Chrysler 392/354 HEMI 8-Hole Adapter Kit.

$1,654.37

TCI Automatic Transmission Kickdown Cables, TV Cable Corrector Kits, Zinc Plated Steel Bracket, TV Cable for Holley Carbs, GM, 200-4R, 4L60/700R4, Kit

TCI Automatic Transmission Kickdown Cables, TV Cable Corrector Kits, Zinc Plated Steel Bracket, TV Cable for Holley Carbs, GM, 200-4R, 4L60/700R4, Kit

$238.55