Volkswagen Workshop Service and Repair Manuals

I

-

1st gear

II

-

2nd gear

III

-

3rd gear

IV

-

4th gear

R

-

Reverse gear

A

-

Final drive

T

-

Speedo drive

Calculating ratios "i"

Z1
Z2

= No. of teeth on driving gear
= No. of teeth on driven gear

driven gear

driving gear

= i

Z2 :Z1= i

Example

1st gear

Final drive

Driving gear

ZG1 = 11

ZA1 = 20

Driven gear

ZG2 = 38

ZA2 = 74

Gear ratio "iG"

Axle ratio "iA"

Overall ratio "ioverall"

ZG2 : ZG1 = iG

ZA2 : ZA1 = iA

(ZG2 : ZG1) x (ZA2 : ZA1) = ioverall

38 : 11 = 3.45

74 : 20 = 3.7

(38 : 11) x (74 : 20) = 12.78