VOLKSWAGEN 020 TRANSMISSION INFORMATION


The table below lists the gear ratios and final drive for all VW 020 transmissions that I've been able to find so far.   To determine what type of transmission you have, look at the numbers stamped on the bottom of the bell housing  next to the oil pan.  The first two or three digits  indicate the transmission type, with the final five digits giving the date of manufacture in the format of DDMMY.  As an example, the is off of my GTI is 4K17083.  This signifies its a GTI "4K" transmission with a manufactured date of August 17,1983, with the 8 in 1980 implied.  Another example is a spare transmission I have with a code of AGB08017, which signifies a GTI 16V "AGB" transmission with a manufactured date of January 8, 1987.

A numerically lower number means a "taller" gear.  For instance, a FN transmission has a 5th gear ratio of .71 which was designed for lower RPM highway cruising and improved fuel economy.  A .89 5th gear in the 4K GTI transmission was designed to keep the engine higher in the RPM range for improved power and performance.

5-SPEED TRANSMISSIONS
Factory Code

FO


FF
FN
FH
FJ
FM
FD
FK


6G


7G


2H


4S


4T

7A
7D


4K

4Y
9A


8A


IS


ACH
AGS
AOP
4S
ACN
AON
ASF


ACL
9A
ACD
AEN

AGB
2Y

AMC
CHE


AVX


AWY


ATH


APW


AUG
1st 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45 3.45
2nd 1.94 1.94 1.94 2.12 1.94 2.12 2.12 1.94 1.94 1.94 2.12 2.12 1.94 1.94 1.94 1.94 1.94 1.94 2.12 2.12 1.94 1.94 1.94 1.94 1.75 1.94
3rd 1.29 1.29 1.29 1.44 1.29 1.44 1.44 1.29 1.29 1.29 1.44 1.44 1.29 1.25 1.37 1.29 1.37 1.37 1.44 1.44 1.29 1.29 1.44 1.29 1.37 1.44
4th 0.97 0.97
0.91
0.91 1.13 0.91 1.13 1.13 0.91 0.91 0.91 1.13 1.13 0.91 0.91 1.03 0.91 1.03 1.03 1.13 1.13 0.97 0.91 1.13 0.91 0.97 1.13
5th 0.76 0.76
0.71
0.71 0.91 0.71 0.91 0.91 0.75 0.75 0.71 0.89 0.89 0.75 0.75 0.75 0.75 0.75 0.75 0.89 0.91 0.80 0.75 0.89 0.75 0.85 0.89
Final Drive 3.89 3.89 3.89 3.89 3.65 3.65 3.94 3.94 3.67 3.94 3.94 3.67 3.67 3.94 3.94 3.94 3.67 3.67 3.67 3.67 3.67 4.25 3.67 3.67 3.67 3.67
MPH in 5th@6500RPM 1 148 148 159 124 169 132 122 148 159 157 125 134 159 148 148 148 159 159 134 131 149 138 134 159 141 134
RPM @ 70 mph 2 3068 3068 2866 3673 2689 3446 3720 3066 2856 2903 3638 3389 2856 3066 3066 3066 2856 2856 3389 3465 3046 3307 3389 2856 3237 3389
Drive Flange Diameter (mm) 90 90 90/
100
100 90 100 100 90 90 90 90 90 90 90? 100 100 90 100 100 100 100 100 100 100 100 100
Clutch dia. (mm) 190 190 190
200
200 200 210 210 200 190 200 210 190
200
200 200? 210 210 210 210 210 210 210 210 210 210 210 210

Notes:

  1. Theoretical.  Figures assume stock tire sizes.
  2. Assumes stock tire size

4-SPEED TRANSMISSIONS
Factory Code (1) GC GP GL GY
1st 3.45 3.45 3.45 3.45
2nd 1.94 1.75 1.75 1.75
3rd 1.28 1.06 1.06 1.06
4th 0.91 0.70 0.70? 0.70?
Final Drive 3.89 - - -
MPH in 4th (4) @3500RPM 1 65 - - -
Hub dia. (mm) 90 90 90 90
Clutch dia. (mm) 190 190 190 190

Notes:

  1. Theoretical.  Figures assume stock tire sizes.