Maximum Performance w/ Trans Brake - Reversed Pattern, Chevy 4" Ext.

"MAXIMUM PERFORMANCE" W/ TRANS BRAKE

• 300m alloy input shaft w/steel drum
• 300m alloy main shaft
• Steel clutch hub
• Billet aluminum direct drum w/ Super Sprag
• Deep aluminum pan
• Straight cut planetary, 2.10-1.40, 2.21-1.44, 2.33-1.48, 2.98-1.56 choice ratio
• Reversed pattern
• Chevrolet 4" ext.

The Coan Racing COA‑21125A Maximum Performance Transmission with Trans‑Brake is a premium-grade Turbo Hydramatic 400 build crafted for championship-level competition. It combines 300M alloy input and main shafts, with the input shaft featuring a steel drum, for exceptional strength under extreme torque loads. The rugged steel clutch hub and billet aluminum direct drum equipped with Coan’s “Super Sprag” deliver rock-solid clutch engagement and rapid one-way lock-up during high-stress launches.

Completed with a deep aluminum pan for improved fluid capacity and heat dissipation, this unit supports heavy-duty, sustained operation. The inclusion of a straight-cut planetary gear set and choice of gear ratios (2.10–1.40, 2.21–1.44, 2.33–1.48, or 2.98–1.56) allows precise tuning to match specific performance goals.

The integrated trans‑brake enables controlled, high-RPM staging and consistent launches, while the reversed shift pattern and 4-inch Chevrolet extension housing simplify installation in tight race chassis. Built to Coan’s “Maximum Performance” standards, this transmission is meticulously assembled and dyno-tested to ensure elite durability, precise shift performance, and race-ready reliability.