Owners of late model Ford Mustangs equipped with the Tremec 3650 transmission were/are no strangers to the effort-laden issues as is found in cool or cold weather. Now, owners of the 2011 Mustang and the 2012 Mustang equipped with the MT82 6-speed manual transmission are experiencing similar symptoms. Don’t fret, though–Ford has already addressed the issue and released an official Technical Service Bulletin (TSB) to provide a solution. When an owner of a Mustang equipped with the MT82 6-speed experiences laborious shifting during warm-up, Ford’s recommendation is to replace the Motorcraft full synthetic manual transmission fluid (factory-filled) in the car with Motorcraft Dual Clutch transmission fluid; one with such a viscosity suitable for all temperatures and conditions.
Keep reading to see the official TSB from Ford!
Ford Technical Service Bulletin
TSB 11-3-18, 2011-2012 Ford Mustang:
Some 2011-2012 Mustang vehicles equipped with a MT82 6-speed manual transmission may exhibit increased shift efforts in cold ambient temperatures. This is usually most noticeable in 1st and 2nd gears but may also be noticed in 3rd through 6th gears. The increased shift effort may be the result of the increased viscosity of the transmission fluid in cold weather.
Follow the Service Procedure to correct the condition.
Replace the Motorcraft Full Synthetic Manual Transmission Fluid with 2.6L (2.7 qt) of Motorcraft Dual Clutch Transmission Fluid. Refer to Workshop Manual, Section 308-03A for the transmission fluid draining and filling procedure. This fluid is suitable for use in all ambient temperatures and seasons, and the Scheduled Maintenance guidelines in the Owner Guide can continue to be followed. The use of friction modifiers or other fluid additives is not recommended since although they may provide some immediate improvement in cold shift effort, they are likely to result in long term degradation of the synchronizers.
Eligible Under Provisions Of New Vehicle Limited
Source: Ford Motor Company via MustangHeavenCategories: 2011 Mustang, 2012 Mustang, Ford, Mustang Tech