"RINGLESS SUPER SHAFT" AEROSPACE ALLOY INPUT SHAFT, TURBO SPLINES, (SHOT PEENED) 12-7/8" FITS 1.69, 1.76, 1.80, 1.89, 1.96, 2.03

(REQUIRES COA-12814, 12815, 12816A, 12816B PUMP)

The Coan Racing COA‑12805 “Ringless Super Shaft” Aerospace Alloy Input Shaft (Turbo Spline, Shot-Peened, 12-7/8″) is a cutting-edge performance upgrade devised for GM Powerglide transmissions with turbo-style splined torque converters across multiple low-gear ratios (1.69, 1.76, 1.80, 1.89, 1.96, 2.03). Constructed from aerospace-grade alloy and enhanced by shot peening to improve fatigue resistance, this shaft introduces a unique ringless design with mid-shaft bushing journals. This configuration enables the integration of cooling circuits while significantly reducing shaft flex under extreme loads.

As a drop-in component, the COA‑12805 fits seamlessly into Powerglide cases with no need for housing or pump machining, provided the appropriate pump assembly (e.g., COA‑12814/12815/12816A/B) is used. Whether you're building a high-horsepower street cruiser, a serious drag racer, or a bracket competitor, this shaft delivers exceptional torque handling, improved longevity, and reliability in demanding environments.