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Final Crawl Ratio Calculator

This will help you determine your final crawl ratio.  

For first (low) gear ratios for automatic transmissions click HERE. 

For first (low) gear ratios for manual transmissions click HERE 

For low gear ratios in transfer cases click HERE.  

To determine what your axle gear ratio is click HERE.

 

Determining Final Crawl Ratio

Transmission Low Gear Ratio: :1 
Transfer Case Low Gear Ratio: :1 
Axle Gear Ratio: :1  		Crawl
:1
Ratio

Ford Transmission Ratio's

Transmission

Type

1st

2nd

3rd

4th

5th

6th

7th

8th

9th

10th

Rev

Automatic Transmissions

Ford C4

3 spd auto

2.46

1.46

1.00

---

---

---

---

---

---

---

2.18

Ford C6

3 spd auto

2.46

1.46

1.00

---

---

---

---

---

---

---

2.18

Ford AOD/AODE

4 spd auto

2.40

1.47

1.00

---

---

---

---

---

---

---

2.00

Ford E4OD

4 spd auto

2.71

1.54

1.00

0.71

---

---

---

---

---

---

2.18

Ford 4R100

4 spd auto

2.71

1.54

1.00

0.71

---

---

---

---

---

---

2.18

Ford 4R70W/E

4 spd auto

2.84

1.55

1.00

0.70

---

---

---

---

---

---

2.23

Ford 4R75W/E

4 spd auto

2.84

1.55

1.00

0.70

---

---

---

---

---

---

2.23

Ford 6R80

6 spd auto

4.17

2.34

1.52

1.14

0.87

0.69

---

---

---

---

3.40

Ford 5R110W TorqShift

5 spd auto

3.11

2.20

1.54

1.00

0.71

---

---

---

---

---

2.88

Ford 6R140 TorqShift

6 spd auto

3.97

2.32

1.52

1.15

0.86

0.67

---

---

---

---

3.12

Ford 10R80

10 spd auto

4.69

2.98

2.14

1.76

1.52

1.27

1.00

0.85

0.68

0.63

TBA

Manual Transmissions

New Process NP435

4 spd manual

6.69

3.34

1.79

1.00

---

---

---

---

---

---

8.26

BorgWarner T-18

4 spd manual

6.32

3.09

1.69

1.00

---

---

---

---

---

---

7.44

BorgWarner T-19

4 spd manual

6.32

3.09

1.68

1.00

---

---

---

---

---

---

6.96

Mazda M5OD-R2

5 spd manual

3.90

2.25

1.49

1.00

0.80

---

---

---

---

---

3.39

Tremec SMOD
(300, 302 cid)

4 spd manual

3.25

1.92

1.00

0.78

---

---

---

---

---

---

3.25

Tremec SMOD
(351W)

4 spd manual

3.01

1.78

1.00

0.78

---

---

---

---

---

---

3.01

Tremec SROD

4 spd manual

3.25

1.92

1.00

0.78

---

---

---

---

---

---

3.25

Tremec TOD

4 spd manual

3.01

1.78

1.00

0.78

---

---

---

---

---

---

3.01

ZF S5-42, close ratio

5 spd manual

4.14

2.37

1.42

1.00

0.77

---

---

---

---

---

3.79

ZF S5-47, close ratio

5 spd manual

5.08

2.60

1.53

1.00

0.77

---

---

---

---

---

4.66

ZF S5-42/S5-47, wide ratio

5 spd manual

5.72

2.94

1.61

1.00

0.76

---

---

---

---

---

5.24

ZF S6-650/S6-750

6 spd manual

5.79

3.30

2.10

1.31

1.00

0.72

---

---

---

---

5.23

For more information of Ford Automatic transmissions, click HERE.

For more information on Ford manual transmissions, click HERE.

Ford Transfer Case Low Range Ratio's:

  • BW1345: 2.74:1

  • BW1356: 2.69:1

  • BW4406: 2.64:1

  • BW4407: 2.69:1

  • BW4416: 2.64:1

  • NP203: 1.96:1

  • NP205: 1.96:1

  • NP208: 2.61:1

  • NP271: 2.72:1

  • NP273: 2.72:1

For more information of Ford transfer cases, click HERE.

 

 

 
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