TH-400: 2:48 first gear ratio, 1:48 second gear. Extreme torque capacity, for blown motors, nitrous and big blocks! Rebuilt front pump utilizes B&M pressure regulator spring and shims. All new B&M high performance friction plates. New intermediate roller clutch. New Kickdown Band with welded anchors. Machined center support w/new case saver ring. All new thrust bearings and races New adjustable modulator and silencer ring. New external electric connector & kickdown solenoid. B&M Competition Oil pickup with special filter. Recalibrated valve body.
TH-350: 2:52 first gear ratio, 1:52 second gear. Extra wide direct drum bushing. Machined forward and direct pistons. All new B&M high performance friction plates. New intermediate and low roller clutches. New Kickdown Band with welded anchors. All new thrust bearings and races New adjustable modulator. New detent control link w/new breather & filter. Recalibrated valve body.