Billet Aluminum Instant Reaction Trans Brake Kit w/ Internal Dump For 1-1/8" Input Shaft

BILLET ALUMINUM INSTANT REACTION TRANS BRAKE KIT W/ CLEAN NEUTRAL AND LOW BAND APPLY (PR/N123N), W/ INTERNAL DUMP FOR 1 1/8" INPUT SHAFT. (INCLUDES PUMP COVER ASSY. W/ ADJUSTABLE REGULATOR, FITTINGS AND HOSE)

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

The Coan Racing COA‑22027‑AL‑ID‑1.125 Billet Aluminum Instant Reaction Trans Brake Kit represents the pinnacle of hydraulic transmission control for Turbo‑Hydramatic 400 setups, tailored for applications using a 1 1/8″ input shaft. Crafted from precision-machined billet aluminum, this valve body kit integrates instant trans brake engagement in first gear, a refined low-band apply for smoother initial launch response, and a robust clean-neutral position for secure shutdowns between runs.

What sets this version apart is its built-in internal dump circuit specifically designed to safeguard the larger 1 1/8″ input shaft from excess hydraulic pressure and seal damage. The kit also includes a complete pump cover assembly with an adjustable regulator, hoses, and fittings, creating an all-in-one solution for maintaining precise hydraulic control under extreme race conditions. To ensure perfect functionality and shift accuracy, installation requires a Precision P08‑408 or P08‑458 shifter and Coan’s billet aluminum direct drum (COA‑22814 or COA‑22815). The result is a compact, bolt-in system that delivers fast, repeatable launches, improved launch feel, critical seal protection, and comprehensive hydraulic stability in high-load racing scenarios.