5-Speed Overdrive Manual Transmission

The Tremec TCET4616-GM is a robust and versatile 5-speed overdrive manual transmission engineered for both street and high-performance racing applications, designed as an upgraded successor to the TR-3550 and TKO models. It boasts a 500 lb-ft torque capacity and a 0.68 overdrive ratio in fifth gear, which helps reduce engine RPM for improved drivability and fuel efficiency. Constructed with durability in mind, the TCET4616-GM features a higher center distance between the main and counter shafts, allowing for larger gears and greater torque handling. The internal components, including gears and shafts, are made from ASTM 4615 steel for increased strength. It utilizes tapered roller bearings on the input, output, and counter shafts to enhance performance and minimize noise. A single-piece countershaft further contributes to its robust torque capacity. This transmission offers a flexible and versatile installation with eight available shifter locations and three unique cross-member mounting configurations. It includes dual electronic and mechanical speedometer pick-ups, a neutral safety switch, and a back-up light sensor. The included billet aluminum shifter provides a short throw for clean, crisp shifts while isolating road noise. Key specifications include a 26-spline input shaft, a 31-spline output shaft, and a transmission bolt pattern that matches the Muncie four-speed. The gear ratios are 3.27 (1st), 1.97 (2nd), 1.34 (3rd), 1.00 (4th), 0.68 (5th), and 3.00 (Reverse). Some sources indicate a potential 600 lb-ft torque capacity, though the primary rating for this specific GM model is 500 lb-ft. Note that some applications may require a Ford input shaft and matching front bearing retainer for installation.