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Quick Summary of Transmissions - 1982-1993 Mustang GT's

Transmission Ratios

Tranny
Part Number
1st 2nd 3rd 4th 5th R Torque Capacity
lbs-ft
Door Tag
Code
4-speed SROD
(1982-1983 1/2)
1
3.07 1.72 1.00 0.70 -- 3.07 ? 4
5-speed T5 (1983 1/2)2
E3ZR-7003-A
2.95 1.94 1.34 1.00 0.725 2.76 265 2
5-speed T5 (1984)3
E4ZR-7003-DA
2.95 1.94 1.34 1.00 0.625 2.76 265 2
5-speed T5 (1985)4
E5ZR-7003-FA
3.35 1.93 1.29 1.00 0.675 3.15 265 2
5-speed T5 (1986)
E6ZR-7003-FA5
E6ZR-7003-FB6
3.35 1.93 1.29 1.00 0.675 3.15 265 2
5-speed T5 (1987-89)7
E6ZR-7003-FB
3.35 1.93 1.29 1.00 0.675 3.15 265 2
5-speed T5 (1989)8
E9ZR-7003-A
3.35 1.99 1.33 1.00 0.675 3.15 300 2
5-speed T5 (1990)9
F0ZR-7003-AA
3.35 1.99 1.33 1.00 0.675 3.15 300 2
5-speed T5 (1991-93)9, 10
FZZR-7003-AA
3.35 1.99 1.33 1.00 0.675 3.15 300 2
AOD (1984-1993)11 2.40 1.47 1.00 0.667 -- 2.00 ?? T


Notes From Chart

1 - SROD stands for "single rail overdrive".
2 - The T-5 transmission debuted mid-year 1983 in V8 Mustangs.
3 - This transmission was also factory-fitted to early 1985 V8 Mustangs.
4 - This was the first "World Class" T-5 used in production. Some early 1985 V8 Mustangs came with the 1984 non-World Class version of the T-5 (mainly due to "build-out").
5 - A neutral position sensor's wiring harness and connector were added to the top cover's left side.
6 - This transmission was also factory-fitted to early-1987 V8 Mustangs.
7 - This transmission was also factory-fitted to late-1986 V8 Mustangs. The output shaft has a 7-tooth speedometer drive gear.
8 - This gearbox was introduced as a running 1989 upgrade. It has an 8-tooth speedo drive gear.
9 - This transmission's output shaft has an 8-tooth speedometer drive gear.
10 - This gearbox contains the standard 5-liter H.O. T-5 ratios. The 1993 SVT Cobra version has a phosphate coated cluster gear and a tapered roller pocket bearing between the input shaft and the output shaft. These Cobra features were phased into 1993 T-5 production for all V8 Mustangs.
11 - AOD stands for "automatic overdrive".


Miscellaneous T5 Information
  • In 1985, the T5 was upgraded to the "World Class" T5 - improvements include:
    • tapered roller bearings on the countershaft
    • caged needle bearings under 1st, 2nd, and 3rd gears on the mainshaft
    • double synchronizers on 1st and 2nd
    • steel blocker rings with friction linings on 3rd and 4th
    • torque capacity remains at 265 lbs-ft because of the new 1st gear ratio being 3.35 vs the 1983 1/2 - 1984's 2.95

  • In 1990, the T5 was upgraded again with the following improvements:
    • 4615 alloy steel for the cluster & 3rd gear
    • 4620 alloy steel for 2nd gear
    • a coarser pitch was used on 2nd and 3rd improving strength
    • these upgrades upped the torque capacity to 300 lbs-ft despite the 3.35 1st gear

  • Torque rating (strength) of a tranny is based on:
    • 1st gear ratio
    • mainshaft - to - countershaft-centerline distance (T5: 77mm)
    • width of gears

  • Note: ALL T5's use Mercon Dextron II / III ATF. This is due to the fact it has very tiny oil transfer holes to lube the needle bearings.

Sources: 1979-1993 V8 Mustang Specifications Guide by Al Kirschenbaum,
Joe's WOT Madness.


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Last update: 3/1/99