TCI Adjustable Front Pump Drive for TH350 & TH400 Transmissions

Designed for dedicated race applications, the TCI Two-Piece Adjustable Front Pump Drive allows compatible GM Turbo 350 (TH350) and Turbo 400 (TH400) transmissions to operate without a torque converter where regulations permit. By eliminating the converter, rotational mass is significantly reduced, resulting in improved acceleration, stronger engine braking and reduced transmission operating temperatures.

Ideal for circle track, drag racing and other motorsport applications, this front pump drive can reduce rotating weight by approximately 15 to 30 pounds compared to a conventional torque converter setup. The reduced mass allows the engine to respond more quickly to throttle input while improving vehicle control during corner entry and exit.

The adjustable two-piece design accommodates vehicles using non-motor plates, as well as 1/8-inch and 1/4-inch motor plates, providing flexibility across a range of race chassis configurations.

Features

• Suits GM TH350 and TH400 automatic transmissions
• Allows race transmissions to operate without a torque converter where permitted
• Reduces rotating mass by approximately 15–30 lbs
• Improves throttle response and off-corner acceleration
• Enhances engine braking for improved corner control
• Helps reduce transmission operating temperatures
• Adjustable design suits non-motor plates, 1/8" and 1/4" motor plates
• Ideal for drag racing, circle track and dedicated race vehicles
• Requires a compatible TCI valve body (sold separately)

Vehicle Applications - Suitable for race vehicles fitted with:

• Chevrolet Small Block V8 engines
• Chevrolet Big Block V8 engines
• GM TH350 Automatic Transmission
• GM TH400 Automatic Transmission

Commonly used in:

• Drag Cars
• Circle Track Cars
• Dirt Track Racers
• Speedway Cars
• Dedicated Competition Vehicles