BIG DOG SUPER PUMP BILLET ALUMINUM GEROTOR PUMP ASSEMBLY (REPLACEMENT PUMP FOR COA-11124-180 TRANSMISSION)

The Coan Racing COA‑12816B‑AL “Big Dog Super Pump” Billet Aluminum Gerotor Pump Assembly is a top-tier front pump upgrade engineered for GM Powerglide transmissions, designed as a direct replacement for the original pump used in Coan’s COA‑11124‑180 “Ultimate Big Dog” builds. Constructed from precision-machined billet aluminum and featuring a high-flow gerotor design, this pump dramatically enhances fluid delivery and efficiency under extreme load conditions.

Built for direct-fit installation into Powerglide cases, the COA‑12816B‑AL offers straightforward integration into performance or track-level builds. It enhances fluid management, pump-to-drivetrain alignment, and overall transmission durability, making it a potent upgrade for racers and high-performance enthusiasts alike.