Transmission Ratings

Transmission

Gear

Torque rating (lb*ft)

Manufacturer

Model

1

2

3

4

5

6

Thunderbird turbo coupe

4.03

2.37

1.49

1.00

0.81

-

235

wide ratio 85-89 Mustang

3.35

1.93

1.29

1.00

0.68

-

265

wide ratio 90-93 Mustang

3.35

1.99

1.33

1.00

0.68

-

300

wide ratio 93 Cobra

3.35

1.99

1.33

1.00

0.68

-

310

close ratio Ford Motorsport

2.95

1.94

1.34

1.00

0.63

-

305-330

T56 6-speed

3.36

2.07

1.35

1.00

0.80

0.62

?

Ford Manuals

SROD 79-83 Mustang

3.07

1.72

1.00

0.70

-

-

?

Toploader over-drive

?

?

1.00

?

-

-

?

Toploader wide-ratio

2.78

1.93

1.36

1.00

-

-

?

Toploader close-ratio

2.32

1.69

1.29

1.00

-

-

?

Ford Automatics

C4

2.46

1.46

1.00

-

-

-

?

C6

2.46

1.46

1.00

-

-

-

?

AOD

2.40

1.47

1.00

0.67

-

-

?

AOD wide ratio

2.84

1.55

1.00

0.67

-

-

?

E40D electronic

2.71

1.53

1.00

0.71

-

-

?

GM

Powerglide
2 speed

1.76

1.00

-

-

-

-

?

1.82

1.00

-

-

-

-

?

Jerico

4 speed

?

?

?

1.00

-

-

?

5 speed

?

?

?

1.00

?

-

?

Lenco

?

?

?

?

?

?

-

?

Liberty

?

?

?

?

?

?

-

?

Richmond

T-10 4 speed

2.43

1.61

1.23

1.00

-

-

?

2.64

1.75

1.34

1.00

-

-

?

2.64

1.60

1.23

1.00

-

-

?

2.88

1.91

1.33

1.00

-

-

?

4+1 street

3.27

2.14

1.57

1.23

1.00

-

?

Optional 1^st gear ratios: 4.41 or 4.06 available

ROD
6 speed

3.27

2.13

1.57

1.23

1.00

0.76

?

4.06

2.22

1.57

1.23

1.00

0.76

?

3.01

1.88

1.46

1.19

1.00

0.62

?

Optional 6^th gear ratios: 0.86 or 0.81 available

Tremec

3550

3.27

1.98

1.34

1.00

0.68

-

350

TKO

?

?

?

?

?

-

400?