GM

RWD TRANSMISSION GEAR RATIOS

AUTOMATIC

Trans Type

First

Second

Third

Fourth

Fifth

ALLISON 1000

 3.10

1.81

1.41

1.00

0.71

POWERGLIDE

 1.82

1.00

-

-

-

POWERGLIDE

 1.76

1.00

-

-

-

Turbo 4L60

 3.06

1.62

1.00

0.70

-

Turbo 4L60E

 3.06

1.62

1.00

0.70

-

Turbo 4L80

 2.48

1.48

1.00

0.75

-

Turbo 4L80E

 2.48

1.48

1.00

0.75

-

Turbo 350

 2.52

1.52

1.00

-

-

Turbo 400

 2.48

1.48

1.00

-

-

Turbo 200-R4

 2.74

1.57

1.00

0.67

-

Turbo 700-R4

 3.06

1.62

1.00

0.70

-

 

MANUAL

Trans Type

First

Second

Third

Fourth

Fifth

Sixth

BORG WARNER T10

 2.23

1.76

1.30

1.00

-

-

BORG WARNER T10

 2.43

1.64

1.24

1.00

-

-

BORG WARNER T10

 2.64

1.76

1.35

1.00

-

-

BORG WARNER T10

2.64

1.64

1.24

1.00

-

-

BORG WARNER T10

 2.88

1.76

1.35

1.00

-

-

BORG WARNER T10

 2.88

1.91

1.35

1.00

-

-

BORG WARNER T10

 3.42

2.28

1.46

1.00

-

-

BORG WARNER T10

 3.44

2.28

1.46

1.00

-

-

BORG WARNER T5

 2.95

1.94

1.34

1.00

0.63(TBI)

-

BORG WARNER T5

 2.75

1.94

1.34

1.00

0.74(TPI)

-

BORG WARNER T56

 2.66

1.78

1.30

1.00

0.74

0.50

BORG WARNER T56

 2.97

1.94

1.35

1.00

0.84

0.62

BORG WARNER T56

 3.36

2.07

1.35

1.00

0.84

0.62

MUNCIE M20

 2.56

1.91

1.48

1.00

-

-

MUNCIE M20

 2.52

1.88

1.46

1.00

-

-

MUNCIE M21

 2.20

1.64

1.28

1.00

-

-

MUNCIE M22

 2.20

1.64

1.28

1.00

-

-

M-12

 2.97

2.07

1.43

1.00

0.84

0.56

SAGINAW (4spd.)

 3.11

2.20

1.47

1.00

-

-

SAGINAW (4spd.)

 2.85

2.02

1.35

1.00

-

-

SAGINAW (4spd.)

 2.54

1.80

1.32

1.00

-

-

SAGINAW (4spd.)

 2.54

1.80

1.44

1.00

-

-

ZF6

 3.07

1.80

1.43

1.00

0.71

0.59

ZF S6-650

 5.79

3.31

2.10

1.31

1.00

0.76

Drive gears

All GM

# of teeth

Gear color

GM part #

Shaft size

Clip size

8

Black

6261783

1.19"

5/16

10

Purple

6261785

1.19"

5/16

18

Green

6260037

1.19"

7/16

19

Natural

8640188

1.19"

7/16

15

Grey

8642620

1.19"

5/16

17

Red

8640517

1.19"

5/16

Small driven gears

Power glide, 200 Metric, TH250, TH350 and TH400

# of teeth

Gear color

GM part #

18

Brown

3987918

19

Natural

3987919

20

Blue

3987920

21

Red

3987921

22

Grey

3987922

23

Black

3980346

Small driven gears

200R-4 and 125 Metric

# of teeth

Gear color

GM part #

26

Brown

25502669

27

Black

410731

28

Yellow

416765

29

Green

403999

30

Blue

561035

31

White

403417

Large driven gears

200 Metric, TH250, TH350, TH400 and 700R-4

# of teeth

Gear color

GM part #

34

Green

9774413

35

Orange

9780387

36

Natural

1359270

37

Red

1359271

38

Blue

1359272

39

Brown

1359273

40

Black

1362048
25513047

41

Yellow

1362195

42

Green

1362049
25513049

43

Purple

1362196
25513050

44

Grey

9780470

45

Lt. Blue

9775187

 

Speedo gear chart for the 700R/4L60/4L60E

15-Tooth Drive Gear

Gear Ratio

Tire Size

Driven Gear

4.56

33

42

4.56

35

39

4.10

26

45

4.10

27

45

4.10

28

44

4.10

29

43

4.10

30

41

4.10

31

40

4.10

33

38

4.10

35

35

3.73

26

43

3.73

27

42

3.73

27 1/2

41

3.73

28

40

3.73

29

39

3.73

30

38

3.73

31

36

 

17-Tooth Drive Gear

Gear Ratio

Tire Size

Driven Gear

3.73

28

45

3.73

29

44

3.42

26

45

3.42

26 1/2

44

3.42

27

43

3.42

28

42

 

18-Tooth Drive Gear

Gear Ratio

Tire Size

Driven Gear

3.23

26

45

3.23

26 1/2

44

3.23

27

43

3.23

28

42

 

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