Billet Aluminum Instant Reaction Trans Brake Kit - Reversed Pattern, PRN123

BILLET BRAKE BILLET ALUMINUM INSTANT REACTION TRANS BRAKE KIT, REVERSED PATTERN (P-R-N-1-2-3)

The Coan Racing COA‑22023‑AL Billet Aluminum Instant Reaction Trans Brake Kit is a premium-performance, precision-machined upgrade for Turbo-Hydramatic 400 transmissions, designed to offer drag racers instant-launch capability with enhanced reliability. Crafted from billet aluminum, this valve body kit replaces the factory hydraulic control with a driver-activated, reverse-pattern sequence (P‑R‑N‑1‑2‑3), and is engineered specifically to deliver trans brake functionality in first gear only. Its Pro‑Tree-style design includes a race-grade solenoid, manual selector valve, billet brake valve, springs, and accumulator upgrades to maintain firm line pressure during high-RPM, high-load scenarios, all within the OE bolt pattern for clean installation.

Installation requires removal of the factory valve body components and replacement with the COA‑22023‑AL assembly. Wiring integrates through the transmission case via the included connector, and biasing is managed by the high-pressure accumulator, ensuring consistent brake engagement and quick release. The kit also features precision orifice drilling and check-ball reconfiguration to refine hydraulic behavior for trans brake activation. Perfectly suited for professional drag racing environments, this kit delivers instantaneous staging control and prevents unwanted reverse gear engagement, offering a highly reliable, competition-ready solution for racers seeking improved launch consistency and control.

Replacement Parts For COA-22023-AL:

• Separator Plate - CCP-0220590K
• Pro Tree Solenoid Block - CCP-0220655
• Manual Select Valve - CCP-0220730G
• 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-SA-101B