New PRO-X™ TH400 from TCI® provides the improved gear splits of a 3-speed design, 3000+ hp durability and a host of drag racing-specific features
The competitive world of drag racing is constantly changing. While the GM Powerglide remains a popular transmission choice due to its proven durability, its 2-speed configuration sometimes leaves something to be desired due to the rpm drop between gears. Recognizing this dilemma, the engineers at TCI® designed a TH400 transmission that is capable of handling the same elevated horsepower levels as the Powerglide but with the advantages of a 3-speed configuration. Beyond the built-in gearing advantages, TCI® also incorporated a “clean neutral” feature after high gear and a Pro Tree Trans-Brake that enables quicker and more consistent launches.
The new PRO-X™ TH400 utilizes premium component upgrades that reduce reciprocating weight while also providing bullet-proof durability that was once thought impossible in a TH400. Upgrade components include five friction clutches and five Kolene steels in the intermediate pack, a 7075-T6 billet aluminum rotating assembly, as well as a main shaft and input shaft made from a hybrid aerospace metal alloy. The GM TH400 pump comes with polymer dry film coated gears and a staked stator support shaft. These upgraded components reduce reciprocating weight by up to 16 lbs., and additional CNC-machining to the GM TH400 case allows the use of spiral locks to support components around the center area for increased strength and concentricity.
Another impressive feature of the PRO-X™ TH400 is the “Clean Neutral” Pro Tree Quick Release Valve Body, which provides the quickest reaction times available and promotes safety by enabling a shift into a second neutral after crossing the finish line. This unique transmission is truly the best 3-speed unit available for the 1500-3000+ hp applications, from Hot Street to Outlaw 10.5 classes. For more information about the TCI® PRO-X™ GM TH400 Transmission or any other TCI® product, call us at 1-888-776-9824, or visit us online at
www.tciauto.com.
Quick Summary
Product: TCI® PRO-X™ GM TH400 Transmission
Part Number: #212507PX1
Features & Benefits:
• Designed to provide superior launching power, gear transitions & durability for 1500-3000+ hp, hardcore drag racing applications
• Features “Clean Neutral” shift directly after high gear
• Proprietary design components reduce rotating weight & provide increased strength & concentricity
• CNC-machined case allows spiral locks for added protection and strength around center support area
• Pro Tree valve body ensures quick reaction times
• Polymer dry film coated pump gears & a staked stator support shaft
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TCI® PRO-X™ GM TH400 Transmission 
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