TCI Speedometer Driven Gear GM 38 Tooth Blue

GM 200C/375B/TH425/475/700R4 38 Tooth Speedo Drive Gear.. 38 Tooth GM Speedo Drive Gear.

Speedometer gears include both the drive gear and the driven gear. The drive gear refers to the gear that is on a transmission’s output shaft. The driven gear is located in a removable housing, usually in the tailhousing, of transmissions. Be aware that some transmissions will have different driven gear housings depending on the tooth count of the driven gear. TCI stocks popular speedometer gears for GM and Ford transmissions. The following formula will work for any GM or Ford vehicle and is very useful when there is no established baseline from which to work, such as replacing a transmission in a vehicle that was purchased without a driveline.

To Calculate the Driven Teeth follow this formula. “Driven Teeth = ‘Drive Teeth x Axle Ratio x Tire Rev. Per Mile’ Divided by ‘1001’. The Tire Revolution per Mile is equal to ‘20168’ divided by the Tire Diameter in Inches.

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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