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

BILLET ALUMINUM INSTANT REACTION TRANS BRAKE KIT W/ CLEAN NEUTRAL AND LOW BAND APPLY (PR/N123N), W/ INTERNAL DUMP FOR 1" 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‑1.000 Billet Aluminum Instant Reaction Trans Brake Kit is a purpose-built, top-tier competition upgrade for Turbo-Hydramatic 400 transmissions that blends instant staging performance with safety and precision. Crafted from precision-machined billet aluminum in the reverse PR/N123N shift pattern, this kit enables aggressive trans brake activation in first gear along with a low-band apply feature for smoother launches. A key upgrade is its integrated clean-neutral position, ensuring reliable neutral disengagement for safer shutdowns between runs.

Uniquely tailored for 1‑inch input shaft applications, the COA‑22027‑AL‑ID‑1.000 includes an internal dump circuit to manage excess hydraulic pressure and prevent input-shaft seal failures. It also comes with a complete pump cover assembly featuring an adjustable regulator, along with necessary fittings and hose lines, creating a neat, all-in-one hydraulic package designed to maintain peak performance under strenuous race conditions.

For proper installation and optimal function, this kit must be paired with a Precision P08‑408 or P08‑458 shifter, and Coan’s billet aluminum direct drum (COA‑22814/COA‑22815) to preserve accurate gear selection and maintain hydraulic integrity. The result is a bolt-in solution that delivers instant reaction staging, consistent line pressure, and controlled fluid dynamics, all packaged to withstand the rigors of high-load, high-launch environments without risking seal damage or hydraulic failure.