"Ultimate XST" Kit w/ 1-1/4" 29 Spline "Super Alloy" Shaft & Complete Pump

ULTIMATE XST KIT

• Includes 1-1/4" 29 spline "super alloy" input shaft
• Complete cast iron pump assembly w/ 32 spline heat treated bolt-in stator
• 7075 billet aluminum forward drum (accepts up to 9 frictions)
• REQUIRES XST - BRUNO - LENCODRIVE CONVERTER

The Coan Racing COA‑22880 “Ultimate XST” Kit is a top-tier transmission system engineered for high-performance Turbo Hydramatic 400-based builds. This comprehensive kit includes a rugged 1-1/4″, 29-spline “Super Alloy” input shaft for exceptional torque resistance, coupled with a durable cast-iron pump assembly featuring a 32-spline, bolt-in, heat-treated stator that ensures stable, high-pressure fluid flow under extreme conditions.

At the heart of the kit lies a 7075 billet aluminum forward drum accepting nine friction plates, striking a balance between strength and lightweight performance. Designed for serious racing applications, the COA‑22880 requires an XST-compatible torque converter but otherwise installs directly into a factory-style TH400 case without machining, delivering a drop-in, race-ready front-end solution.

Meticulously assembled in the USA to Coan’s elite standards, the “Ultimate XST” kit optimizes the transmission’s hydraulic and mechanical systems for the most demanding drag, bracket, or pro-street builds. By combining reinforced internal components, precision machining, and XST converter compatibility, this package creates a resilient, responsive foundation for TH400 transmissions.