TCI Vacuum Modulator - Adjustable - GM - Powerglide - 1963-73
GM '63-'73 Powerglide Adjustable Vacuum Modulator Valve. This TCI Adjustable Modulator Valve is designed specifically for GM '63-'73 Powerglide Transmissions.
The vacuum modulator is a vital component of automatic transmissions. It tells the transmission what kind of load is being put on it, allowing the transmission to react with the proper line pressures and shift points. Over time, modulators can develop leaks, suffer ruptured diaphragms, become bent, etc. Not only can this cause annoying drivability issues, it can lead to premature transmission failure. TCI comes to the rescue with this line of new, adjustable modulators. Not only will you renew performance, but you will also have the ability to slightly raise/lower part throttle shift points and line pressures. Simply adjust the screw inside the vacuum nipple for more or less diaphragm pre-load.
For TH350/400 Valve, see 350001.
You've invested in horsepower. Now get it all to the ground with TCI®. TCI®'s track-tested Transmissions, torque converters and components can turn that muscle into rear-wheel power. Designed, built and tested by hardcore racers and enthusiasts, TCI® Transmission products are specifically engineered to crank out race-winning power mile after grueling mile, run after punishing run. TCI® gives you more than just 35+ years of on-track experience. As part of their extensive quality control process, each precision-built TCI® part is meticulously checked by their in-house QC experts. Every Transmission and valve body is both hydraulic-circuit & dyno tested; every converter leak-checked & computer balanced. When you put one a TCI® product on your vehicle, whether for racing or towing, for car or truck, you know it's ready to rock. Just as importantly, TCI® makes this performance and quality affordable. So you can break records without breaking the bank. For winning performance, quality and value, TCI® can't be beat. With over a quarter century in the performance industry, TCI® has established a reputation as being one of the best at producing quality performance products. TCI® has combined what they have learned at the track with their engineering department to develop products that give both performance and value. Founded in 1968 in Memphis, Tennessee, TCI® Automotive was born with a racing background and as the sport of racing has grown…so has TCI®.
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