The Diamond T FS10R80-6 Torque Converter is purpose-built for 2018-2021 Ford Mustang 2.3L and 2019-2022 Ford Ranger 2.3L models running the 10R80 10-speed automatic with the 6-lug converter pattern. With a 12" diameter, 5.120" overall height, and 2.351" ID, this unit is engineered to match critical OE dimensions while delivering a durability and performance upgrade over stock components.
Internally, it uses a 41 spline input and 39 spline stator for proper 10R80 engagement, along with a 0.825" diameter, 0.890" long pilot to ensure accurate crankshaft location. The hub features 4 milled flats (2.755" OD, 1.530" long) with inner bushings for stable support and long-term reliability. Externally, the converter mounts via 6 studs with M10 x 1.0 threads on a 9-7/16" bolt circle, matching the factory 6-lug flexplate layout.
A key performance feature is its super low fin angle, which is designed to improve fluid efficiency and give more controlled stall behavior—ideal for turbocharged EcoBoost setups that see spirited driving, tuning, or light towing. Combined with an upgraded lockup clutch, this converter enhances torque transfer, reduces slip, and helps manage 10R80 temperatures under load. Backed by a lifetime warranty and proudly American made, the FS10R80-6 delivers the precision and confidence expected from Diamond T—American Made, Because It Matters.
