Billet Aluminum Instant Reaction Trans Brake Kit w/ Internal Dump For 1-3/16" Input Shaft

BILLET ALUMINUM INSTANT REACTION TRANS BRAKE KIT W/ CLEAN NEUTRAL AND LOW BAND APPLY (PR/N123N), W/ INTERNAL DUMP FOR 1 3/16" 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‑1.188 Billet Aluminum Instant Reaction Trans Brake Kit is an advanced, precision-engineered hydraulic system specifically designed for Turbo‑Hydramatic 400 transmissions equipped with a 1 3/16″ input shaft. Machined from durable billet aluminum and built to the reverse PR/N123N shift pattern, this unit integrates instant trans-brake capability in first gear, low-band apply assistance for smoother initial launch engagement, and a clean-neutral safety position to reliably hold neutral between runs.

Uniquely, this version includes an internal dump circuit tailored for the larger 1 3/16″ shaft, effectively managing excess hydraulic pressure to protect shaft seals and ensure system durability under extreme use. It also comes complete with a pump cover assembly featuring an adjustable pressure regulator, plus all necessary fittings and hose, the full package needed to optimize line pressure and hydraulic control in high-load racing environments.

To function correctly, this sophisticated kit must be paired with a compatible shifter (Precision P08‑408 or P08‑458) and Coan’s billet aluminum direct drum (COA‑22814 or COA‑22815), which ensures precise shift positioning and proper hydraulic flow. When installed, it provides racers with a compact, bolt-in system that delivers reliable trans-brake staging, refining launch consistency and protecting critical components, ideal for serious bracket or heads-up drag applications.