Coan reverse servo spring for GM TH400 transmissions, manual design. Made from steel with a natural finish, designed for street or racing builds to ensure proper reverse gear engagement. Enhances...

Coan fluid pressure regulating spring for GM TH400 transmissions. Supports up to 220 psi, designed for street or racing builds to optimize transmission line pressure. Ensures consistent shifting and...

Coan master overhaul kit for GM TH400 transmissions. Includes clutches, steels, gaskets, and seals, designed for street or racing builds to provide a complete rebuild solution. Ensures reliable...

Coan gasket and seal kit for GM TH400 transmissions. Includes gaskets, O-rings, and seals, designed for street or racing builds to ensure a leak-free rebuild. Provides essential sealing components...

Coan sealing rings for GM TH400 transmissions, forward/direct drum (race). Made from composite material for aluminum drums, designed for drag racing builds to prevent fluid leaks. Ensures reliable...

Coan output shaft bearing kit for GM TH400 transmissions. Includes needle roller bearings and shim, designed for street or racing builds to reduce friction and ensure proper alignment. Enhances...

Coan Hi-Flo transmission filter for GM TH400 transmissions, 1967-up. Designed for street or racing builds to ensure maximum fluid flow and filtration, preventing debris buildup. Enhances transmission...

Coan input shaft for GM TH400 transmissions, compatible with OEM drum. Features a 300M alloy steel construction with larger splines, designed for drag racing builds to handle extreme torque. Ensures...

Coan main shaft for GM TH400 transmissions. Features a 300M alloy steel construction with rolled splines for added strength, designed for drag racing builds to handle high torque. Ensures reliable...

Coan forward clutch hub for GM TH400 and 4L80E transmissions. Made from billet steel alloy for durability, designed for drag racing or street-strip builds. Ensures reliable power transfer and clutch...

Coan direct drum assembly for GM TH400 transmissions. Features a 5-clutch design, made from 7075 billet aluminum, includes intermediate hub and pressure plate, designed for drag racing builds...

Coan direct drum assembly for GM TH400 transmissions. Features a 36-element super sprag, 5-clutch intermediate design, made from steel with a natural finish, designed for drag racing builds. Ensures...