Foxbody Mustang Transmission Specifications

Throughout the production run of the Foxbody Mustangs (1979-1993), Ford implemented 4 different transmissions - 3 automatics and 1 manual. Use the links below to navigate the specifications on the SROD, AOD and C4/C5 automatic transmissions as well as the Borg-Warner (now Tremec) T5.

Foxbody Drivetrain and Transmission Diagrams

1979-1993 Foxbody Mustang Factory Drivetrain Specs
AOD Cutaway Diagram
C4/C5 Cutaway Diagram
T5 Cutaway Diagram

Foxbody AOD, C4/C5, SROD Automatic Transmissions

1979-1983 1/2 SROD Transmission Gear Ratios
1979-1982 C4/C5 Transmission Specs
AOD Automatic Transmission Gear Ratios
AOD Automatic Transmission Torque Converter & Stall Speeds

Foxbody T5 Transmission

T5 5 Speed Transmission Specs
Clutch Specifications


1979-1993 Mustang Factory Drivetrain Specs

Year Engine Transmission Ring Gear Size Standard Gear Ratio Optional Gear Ratio
1979 5.0 L SROD 4spd
C-4 3spd auto
7.5 in
7.5 in
3:08:1
2.47:1
NA
3.08:1
1980 4.2 L C-4 3spd auto 7.5 in 2.26:1 NA
1981 4.2 L C-4 3spd auto 7.5 in 2.26:1 3.08:1 Trak-Lok
1982 4.2 L C-5 3spd auto 7.5 in 2.73:1 3.08:1 Trak-Lok
1983
1983 1/2
5.0 L SROD 4spd
T5 5spd
7.5 in 3.08:1 Trak-Lock
3.27:1 Trak-Lok
NA
1984 5.0 L T5 5spd 7.5 in 3.08:1 Trak-Lok 3.27:1 Trak-Lok
1984-85 (CFI)
1985 4bbl
5.0 L AOD 4spd auto
T5 5spd
7.5 in 3.27:1 Trak-Lok
2.73:1 Trak-Lok
NA
3.08:1 Trak-Lok
1986 5.0 L AOD 4speed auto 8.8 in 3.27:1 Trak-Lok NA
1986-93 5.0 L T5 5spd 8.8 in 2.73:1 Trak-Lok 3.08:1 Trak-Lok
1987 5.0 L AOD 4speed auto 8.8 in 2.73:1 Trak-Lok 3.08:1 Trak-Lok
1988-93 5.0 L AOD 4speed auto 8.8 in 2.73:1 Trak-Lok 3.27:1 Trak-Lok
1993 Cobra 5.0 L T5 5spd 8.8 in 3.08:1 Trak-Lok NA

SROD 4 speed Transmission Specs (automatic)

Year 1st 2nd 3rd 4th Reverse Input Shaft Length
1979-83 1/2 3.07 1.72 1.00 .70 3.07 7.8 in

C4/C5 Automatic Transmission Gear Ratios

Year 1st 2nd 3rd Reverse Factory Lubricant
1979-1982 2.46 1.46 1.00 2.18 Dexron II, 11 qts

C4/C5 Torque Converter

Year Ratio Stall Speed (rpm)
1979 2.05:1 ~1500
1980 2.09:1 ~1500
1981 2.09:1
2.28:1 (CA)
~1500

AOD Automatic Transmission Gear Ratios

Year 1st 2nd 3rd 4th Reverse Factory Lubricant
1984-1993 2.40 1.47 1.00 .667 2.00 Mercon ATF, 12.3 qts

AOD Automatic Transmission Torque Converter

Year Ratio Stall Speed (rpm)
1984 2.28:1 1600-2200
1985-88 2.53:1 1600-2200
1988-93 2.30:1 1600-2200

T5 5 Speed Transmission Specs

Year 1st 2nd 3rd 4th 5th Reverse Part Number Torque Capacity* Factory Lubricant (5.6 pints)
1983 1/2 2.95 1.94 1.34 1.00 .725 2.76 E3ZR-7003-CA 275-295 ft-lb Dexron II Series D ATF
1984 2.95 1.94 1.34 1.00 .625 2.76 E4ZR-7003-DA 275-295 ft-lb Dexron II Series D ATF
1985 3.35 1.93 1.29 1.00 .675 3.15 E5ZR-7003-FA 305-325 ft-lb Dexron II Series D ATF
1986 3.35 1.93 1.29 1.00 .675 3.15 E6ZR-7003-FA/FB 305-325 ft-lb Dexron II Series D ATF
1987-89 3.35 1.93 1.29 1.00 .675 3.15 E6ZR-7003-FB 305-325 ft-lb Mercon ATF (1988 up)
1989 3.35 1.99 1.33 1.00 .675 3.15 E9ZR-7003-AA 305-325 ft-lb Mercon ATF
1990 3.35 1.99 1.33 1.00 .675 3.15 F0ZR-7003-AA 305-325 ft-lb Mercon ATF
1991-93 3.35 1.99 1.33 1.00 .675 3.15 F2ZR-7003-AA 305-325 ft-lb Mercon ATF
*Lower number was factory rated torque number. Factory meausurements were done at continuous load, not instantaneous. The higher torque rating is what real world application and 3rd parties have discovered the T5 to withstand.

Foxbody T5 Stock Clutch Specifications

Year Clutch Diameter Hub Material Clutch Part # Pressure Plate Part # Load Capacity
1979-1983 10 in 10-spline, 1 1/16 in Asbestos D9ZC-7550-CA D9ZC-7653-DA 1455 lbs
1984 10 in 10-spline, 1 1/16 in Asbestos E4ZR-7550-AA E4ZR-7653-AA 1540 lbs
1985 10.5 in 10-spline, 1 1/16 in Organic E5ZR-7550-AA E4ZR-7653-AA 1540 lbs
1986-87 10.5 in 10-spline, 1 1/16 in Organic E6ZR-7550-AA E6ZR-7653-AA 1644 lbs
1988-93 10.5 in 10-spline, 1 1/16 in Organic F0ZZ-7550-AA F0ZZ-7563-A 1877 lbs ('88)
1770 lbs ('89)
2012 lbs ('90-93)
1993 Cobra 10.5 in 10-spline, 1 1/16 in Organic F3ZZ-7550-A F3ZZ-7563-A 2124 lbs