Billet Aluminum Trans Brake Kit w/ Clean Neutral & Low Band Apply - PR/N123N

BILLET ALUMINUM TRANS BRAKE KIT, W/ CLEAN NEUTRAL AND LOW BAND APPLY. (PR/N123N)

REQUIRES P08-408/P08-458 SHIFTER (MUST BE USED WITH BILLET ALUMINUM DIRECT DRUM COA-22814/COA-22815)

The Coan Racing COA‑22025‑AL Billet Aluminum Trans Brake Kit (Clean Neutral & Low-Band Apply, PR/N123N) is a premium, race-engineered valve body upgrade designed for the Turbo-Hydramatic 400 transmission. Crafted from high-strength billet aluminum, this kit is built to Coan’s exacting standards to deliver precise hydraulic control and resist high-heat environments. The reverse-pattern gear sequence (PR/N123N) includes a dedicated “clean neutral” position for secure engine shutdown between runs, along with trans brake activation in first gear and controlled low-band apply for improved launch management.

To ensure compatibility and accurate shifting, installation mandates the use of a Precision P08‑408 or P08‑458 shifter and a billet aluminum direct drum (COA‑22814 or COA‑22815), which provides the correct hydraulic architecture and prevents potential seal issues when used with clean‑neutral setups. The kit includes all necessary components, manual selector valve, solenoid block, high-pressure accumulator spring, modulator plug with O‑ring, separator plate, and a set of release springs, producing firm launch pressure and smooth, consistent engagement.

Installation requires removing the factory valve body, dropping in the billet assembly into the OEM bolt pattern, upgrading accumulator and direct drum components, and wiring the included case pass‑through connector for the solenoid. The result is a clean, fully manual trans brake system with a safety neutral position, low-band launch assist, and optimized hydraulic flow, ideal for bracket racers seeking consistent, controlled power application and enhanced track safety.

Replacement Parts For COA-22025-AL:

• Separator Plate - CCP-0220590I
• Manual Valve - CCP-0220730D
• "Billet Brake" Solenoid - COA-22040B
• Trans Brake Spring Kit - COA-22042
• Reverse Servo Spring - COA-22043
• Modulator Plug - COA-22045A
• Spring - COA-22046
• Modulator, Solenoid, Case Connector O-Ring - COA-22163
• Connector, Single Prong - T01-5A-101B