Ford Mustang (1999-2004) Service Manual: Manual Transmission

The T56 six-speed manual transmission features the following:

• six forward speeds and one reverse speed.
• forward gears are synchronized and helical cut.
• a reverse gear operates through a constant-mesh, fully synchronized system.
• a shift interlock system prevents the engagement of more than one gear.
• a countershaft with two sections, the countershaft cluster and the countershaft extension. The countershaft cluster is serviced as an assembly, the countershaft extension components are serviced.
• two tapered roller bearings on the output shaft.
• two tapered roller bearings on the countershaft cluster.
• a tapered roller bearing on the input shaft.
• a tapered roller bearing on the countershaft extension.
• countershaft cluster endplay controlled by shims located in the transmission adapter plate.
• countershaft extension endplay controlled by shims located in the extension housing.
• input/output shaft endplay is controlled by shims located in the transmission adapter plate.
• removable wear pads on the shift forks.
• an aluminum main case, extension housing, adapter plate and clutch housing.

Transmission Identification

The transmission identification tag is located under the lower bolt that retains the extension housing to the main case.

The six speed (T56) transmission is available for the Mustang 4.6L (4V).

Transmission Identification