whats up everyone I really need help on making sure I am putting the same transmission replacement on my car , what serial numbers do I match or even go by before I end up buying a used transmission. Thanks in advance!
Starting with the 2001 model year, Ford rolled out yet another 5-speed transmision known as the TR-3650. Like the T45, it uses a ribbed aluminum case with an integral bellhousing. There were no variations between GT and Cobra versions 2001-2004. In 2005, the TR-3650 received a revised case and remote mount shifter for use in the 2005-2010 Mustang GT. All Mustangs equipped with this transmission use an 11" clutch. Like the T45, the weak spot in this transmission is the 10-spline input shaft. The output shaft is a robust 31-spline. 01-04 transmissions use a rear slip yoke where the 05-10 variant uses a fixed flange. While the 01-04 3650 shifter appears identical to the T5/T45 unit, they are not interchangeable. The 3650 can be retrofitted to T45 applications if a Speed-Cal is used to compensate for the difference in speedometer signals. Gear ratios for the TR-3650 are: Year1st2nd3rd4th5thReverse
2001-2004 2V 3.38 2.00 1.32 1.00 .68 3.38
2001 4V 3.38 2.00 1.32 1.00 .68 3.38
2003-2004 4V 3.38 2.00 1.32 1.00 .62 3.38
2005-2010 3V 3.38 2.00 1.32 1.00 .68 3.38
The TR-3650 can be found behind:
2001-2004 Mustang GT 4.6L 2V V8 with transmission code K
2001 Mustang Cobra 4.6L 4V V8 with transmission code K
2003-2004 Mustang Mach 1 4.6L 4V
2005-2010 Mustang GT 4.6L 3V
2001 Mustang Bullitt 4.6L 2V V8 with transmission code K