Extreme Duty "Lock-Up Pump Assembly w/ Modified OEM body & Aluminum Cover - Fits 1-1/4" Shaft

EXTREME DUTY ALUMINUM "LOCK-UP" PUMP ASSEMBLY

• Modified OEM pump body
• Billet Aluminum cover w/ wear plate
• Heat treated bolt-in stator
• Adjustable regulator
• Fits 1-1/4" shaft

The Coan Racing COA‑22822C‑LU Extreme Duty Lock‑Up Pump Assembly is a top-tier hydraulic system engineered for high-performance TH400 transmissions. This robust unit combines a modified OEM-style pump body with a precision-machined billet aluminum cover outfitted with a durable wear plate, ensuring long-term resistance to fluid-induced erosion. Inside, the internal gears and a heat-treated, bolt-in stator work together to deliver consistent fluid flow, while the adjustable pressure regulator allows builders to tailor line pressure precisely to their power levels and tuning goals. Designed to support a 1-1/4″ shaft, this pump seamlessly integrates into stock TH400-style cases without requiring additional machining.

Built for the extremes of drag, bracket, or performance street applications, the COA‑22822C‑LU provides stable hydraulic pressure and exceptional durability. Its thoughtful engineering, including hard-coat surfaces and adjustable pressure control, makes it an essential choice for anyone looking to optimize transmission responsiveness, shift consistency, and converter lock-up performance under demanding driving conditions.