Tremec TR-3650 transmission
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 ft·lbf (490 N·m) of torque. The loss in power transmission efficiency is rated at approximately 16% in 4th gear for a 2005–present Ford Mustang GT.
TR-3650 used in the 2001-2004 Ford Mustang GT
- 1st: 3.380:1
- 2nd: 2.000:1
- 3rd: 1.320:1
- 4th: 1.000:1
- 5th: 0.670:1 (used on 01-04 with 3.27:1 final drive)
- 5th: 0.620:1 (used in 03-04 with 3.55:1 final drive, Mach1)
- Rev: 3.380:1
Note that in the other TR-3650 applications, the 5th gear ratio is also available with 0.68(05-present with 3.55:1 final drive) and 0.74.
Recommended Oil and Fill Capacity
TREMEC engineers have recommended Texaco-Havoline Dexron III/Mercon Non-Synthetic ATF. There has been a significant amount of confusion regarding the proper capacity and proper type of ATF for the TR-3650 which may have a correlation with a rather large number of complaints about notchy shifting, shift "nibbling", noisy synchros, and grinding gears. The 2007 Mustang GT owner's manual specified the use of 3.0 L of non-synthetic Mercon ATF in the 3650, while the 2008 Mustang GT owner's manual now specifies the use of 3.0 L of Mercon-V ATF in the 3650. Dexron III/Mercon Non-Synthetic ATF seems to work best for pre-2005 Mustang GTs. NB: Tremec service manual also specifies Mobil 1 Synthetic ATF ( Tremec specification ET-M-99 ) in addition to Dexron III.
Note that Tremec engineers have also recommended GM Synchromesh as the transmission fluid.
- 2001 Ford Mustang Cobra, top-loading shifter.
- 2001 Ford Mustang Bullitt
- 2001-2004 Ford Mustang GT, top-loading shifter.
- 2003-2004 Ford Mustang Mach 1
- 2002-2003 Ford Falcon BA
- 2003-2005 MG ZT 260
- 2005–2010 Ford Mustang GT, remote mounted shifter (TCET5757)
- Road&Track 5th Gen Mustang Specs
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