TransGo 400-3 Full Manual Reprogramming Kit – TH400 / Turbo 400 – 1965 Onwards

TransGo 400-3 Full Manual Reprogramming Kit – TH400 / Turbo 400 – 1965 Onwards

The TransGo 400-3 Reprogramming Kit is designed for GM TH400 / Turbo 400 automatic transmissions and converts the transmission to full manual shift control for performance, competition, off-road and pro-street applications.

Once installed, the transmission operates as a stick-shift automatic, allowing the driver to manually command each gear rather than relying on normal automatic shift operation.

A major advantage of the 400-3 is that it can be converted back to automatic operation from outside the transmission in approximately 5 minutes, making it a flexible option for vehicles that may alternate between full manual and automatic use.

Benefits:

• Full manual shift control

• Stick-shift operation

• Designed for full race applications

• Suitable for competition use

• Suitable for off-road use

• Suitable for pro-street applications

• Firmer, more positive shift control

• Improved transmission control under performance driving

• Can be converted back to automatic operation externally

• No transmission removal required for normal kit installation

Kit Contents:

• 2 x different-size 1-2 shift valves

• High-rate direct clutch return springs

• Heavy-duty intermediate pressure plate snap ring

• 3rd clutch dual-feed separator plate

• Governor clips

• Band-adjusting shims

• Shift valve springs

Transmission Compatibility:

Suitable for:

• GM TH400

• GM Turbo 400

• THM400

For applicable 1965 onwards transmissions.

Recommended Application:

Ideal for:

• Drag racing

• Competition vehicles

• Off-road vehicles

• Pro-street builds

• Performance applications requiring full manual transmission control

Installation Recommendation: Experienced transmission technician

Transmission Removal Required: No