The TREMEC TR-3650 is a 5-speed manual transmission for longitudinal engine automobiles. It includes a 5th gear that functions as an overdrive gear, light-weight aluminum housings, a synchromesh reverse gear, and synchromeshed helical cut forward gears. It is manufactured by Transmission Technologies Corporation and is rated for 360 lbf⋅ft (490 N⋅m) of torque. The loss in power transmission efficiency is rated at approximately 16% in 4th gear for a 2005–2010 Ford Mustang GT.