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020 Transmission Codes and Specs

Codes located at bottom of Bell Housing
Rabbit - Caddy - Jetta - Scirocco
Rabbit Convertible / Cabriolet
Rabbit
Code Type Manufacture Dates
GC 4S 02/74-03/75
EQ 3A 02/74-03/75
GH 4S 08/76-11/77
EV 3A 03/78-07/79
FO 5S 08/78-05/79
FF 5S 03/78-07/79
FN 5S 01/80-03/81
GL 4S 01/80-03/81
GP 4S 01/80-03/81
TB 3A 01/80-03/81
TC 3A 01/80-03/81
4K 5S 08/82-07/83
7A 5S 01/82-07/83
2H 5S 08/82-07/83
4A 4S 08/82-07/83
FK 5S 08/82-07/83
TG 3A 01/82-07/83
TH 3A 08/82-07/83
TM 3A 08/82-07/83
TK 3A 08/82-07/84
TF 3A 08/82-07/84
TCA 3A 08/82-07/84
GY 4S 08/82-07/84
TN 3A 08/83-07/84
9A 5S 07/84-07/84
Caddy
Code Type Manufacture Dates
EQ 3A 03/78-08/80
EV 3A 03/78-08/80
FF 5S 03/78-08/80
GC 4S 01/79-08/80
GC 4S 03/78-07/79
FF 5S 01/80-03/81
FN 5S 01/80-03/81
GL 4S 01/80-03/81
GL 4S 01/82-03/82
GP 4S 01/80-03/81
GP 4S 01/82-03/82
TB 3A 01/80-03/81
TC 3A 01/80-03/81
FK 5S 08/82-07/83
FN 5S 08/82-07/84
GL 4S 08/82-07/84
GY 4S 08/82-07/84
TB 3A 08/82-07/84
TC 3A 01/82-07/83
TCA 3A 08/82-07/84
TF 3A 08/82-07/84
TG 3A 01/82-07/83
TH 3A 08/82-07/84
TK 3A 08/82-07/84
TM 3A 08/82-07/84
2H 5S 08/82-07/83
4A 4S 08/82-07/84
7A 5S 08/82-07/84
Cabriolet
Code Type Manufacture Dates
ACD 5S 10/87-01/89
AUG 5S 08/89-01193
TN 3A 08/84-08/84
TNA 3A 09/84-01/89
TNA 3A 08/89-07/93
4K 5S 01/84-06/84
9A 5S 01/84-01/84
FF 5S 08/80-01/81
FN 5S 08/81-01/83
TB 3A 08/80-12/82
TF 3A 10/82-01/83
Jetta
Code Type Manufacture Dates
EQ 3A 08/79-07/80
FM 5S 08/79-07/80
GC 4S 08/79-07/80
TB 3A 08/80-07/81
FF 5S 03/81-07/81
TC 3A 11/81-07/82
FN 5S 08/81-07/83
TF 3A 10/82-07/83
TG 3A 10/82-02/84
TH 3A 10/82-07/83
4K 5S 10/83-02/84
7A 5S 08/83-02/84
TM 3A 08/83-02/84
TN 3A 10/83-02/84
TK 3A 08/83-02/84
TL 3A 08/84-07/85
TJ 3A 08/84-07/85
ACH 5S 08/84-07/85
Scirocco
Code Type Manufacture Dates
EQ 3A 02/74-03/75
GC 4S 02/74-03/75
EV 3A 08/78-07/79
FF 5S 08/79-07/80
TB 3A 08/80-04/81
FN 5S 08/81-07/83
TF 3A 10/82-07/83
2H 5S 01/83-07/83
4K 5S 08/83-06/84
TN 3A 08/83-07/84
9A 5S 07/84-07/84
TNA 3A 09/84-07/85

Transmission codes are listed by model and manufacture date on the right.

CODE R&P 1st 2nd 3rd 4th 5th Overall Flanges Switch Mount
2H 3.94 3,45 2.12 1.44 1.13 0.91 3.59 90mm Large Stud
2Y* 3.67 3.45 2.12 1.44 1.13 0.91 3.34 100mm Small Both*
2Y(16v) 3.67 3.45 2.12 1.44 1.13 0.91 3.34 100mm Small Both*
4K 3.94 3.45 2.12 1.44 1.13 0.89 3.46 90mm Large Stud
4S 3.94 3.45 1.94 1.29 0.91 0.75 2.96 100mm Large Hole
4T 3.67 3.45 1.94 1.29 0.91 0.75 2.75 90mm Large Stud
4Y 3.67 3.45 2.12 1.44 1.13 0.91 3.34 90mm Large Stud
6G 3.65 3.45 1.94 1.29 0.91 0.71 2.59 90mm Large Stud
7A 3.94 3.45 1.94 1.29 0.91 0.71 2.80 90mm Large Stud
7D 3.94 3.45 1.94 1.25 0.91 0.71 2.80 90mm Large Stud
7G 3.65 3.45 2.12 1.44 1.13 0.91 3.32 90mm Large Stud
8A 3.67 3.45 1.94 1.29 0.91 0.75 2.75 90mm Large Stud
9A 3.67 3.45 2.12 1.44 1.13 0.89 3.27 100mm Large Hole
ACD 3.67 3.45 2.12 1.44 1.13 0.89 3.27 100mm Small Both*
ACH 3.94 3.45 1.94 1.37 1.03 0.75 2.96 90mm Large Hole
ACL 3.67 3.45 1.94 1.37 1.03 0.75 2.75 100mm Large Hole
ACN 3.67 3.45 1.94 1.37 1.03 0.75 2.75 100mm Large Hole
AEN 3.67 3.45 2.12 1.44 1.13 0.89 3.27 100mm Small Both*
AGB* 3.67 3.45 2.12 1.44 1.13 0.91 3.34 100mm Large Both*
AGS 3.94 3.45 1.94 1.29 0.91 0.75 2.96 100mm Small Hole
AMC 3.67 3.45 1.94 1.29 0.97 0.80 2.94 100mm Small Hole
AON 3.67 3.45 1.94 1.37 1.03 0.75 2.75 100mm Small Hole
AOP 3.94 3.45 1.94 1.29 0.91 0.75 2.96 100mm Small Hole
APW 3.67 3.45 1.75 1.37 0.97 0.85 3.20 90mm Large Hole
ASF 3.67 3.45 1.94 1.37 1.03 0.75 2.75 100mm Small Hole
ATH 3.67 3.45 1.94 1.29 0.91 0.75 2.75 100mm Small Hole
AUG 3.67 3.45 1.94 1.44 1.13 0.89 3.27 100mm Small Hole
AVX 4.25 3.45 1.94 1.29 0.91 0.75 3.19 90mm Small Hole
AWY 3.94 3.45 1.94 1.44 1.13 0.89 3.51 100mm Small Hole
CHE 3.67 3.45 1.94 1.29 0.97 0.80 2.94 100mm Small Hole
FD 3.89 3.45 2.12 1.44 1.13 0.91 3.54 90mm Small Stud
FF 3.89 3.45 1.94 1.29 0.97 0.76 2.96 90mm Large Stud
FH 3.89 3.45 1.94 1.29 0.91 0.71 2.76 90mm Large Stud
FJ 3.89 3.45 1.94 1.29 0.91 0.71 2.76 90mm Large Stud
FK 3.89 3.45 2.12 1.44 1.13 0.91 3.54 90mm Small Stud
FM 3.89 3.45 2.12 1.44 1.13 0.91 3.54 90mm Small Stud
FN 3.89 3.45 1.94 1.29 0.91 0.71 2.76 90mm Large Stud
FO 3.89 3.45 1.94 1.29 0.97 0.76 2.96 90mm Small Stud

90mm flange
CODE Application
ACN 07/84-09/86 Golf
08/84-07/85 Jetta
ACH 07/84-09/86 Golf
08/84-07/85 Jetta
AGS 08/86-07/87 Golf
08/86-07/87 Golf
AOP 08/88-07/89 Golf
10/87-07/88 Jetta
AEN 11/87-07/88 Jetta
ASF 09/87-05/88 Golf
09/87-05/88 Jetta
4S 08/87-08/88 Jetta
AWY 08/89-07/91 Golf
08/89-07/90 Jetta
AVX 01/91-07/92 Jetta
100mm flange
CODE Application
9A 08/84-07/85 Golf
01/85-07/85 Jetta
07/84-07/87 Scirocco
2Y 09/87-05/88 Golf
10/87-05/88 Jetta
07/87-07/88 Scirocco
ACD 09/87-05/88 Golf
10/87-10/87 Jetta
AGB 09/87-09/87 Golf
02/87-07/87 Jetta
02/86-07/89 Scirocco
ACL 08/87-09/87 Jetta
AON 09/87-10/87 Golf
09/87-05/88 Jetta
AUG 08/89-07/90 Golf
08/89-07/90 Jetta

VW MotorSport Ring & Pinions small input shaft, 8v 4.20 4.46 4.64 4.81 5.07 -
VW MotorSport Ring & Pinions large input shaft, 16v 3.32 4.20 4.46 4.64 4.81 5.07


Before talking about acceleration, fuel economy or driveability, it's necessary to know ONE thing about that tranny you're thinking of buying ... will it fit?

First off, 8V trannies will fit in 16V cars by changing the clutch disc from a 16V disc to an 8V disc .. they're both 210mm and will work. 16V trannies will bolt up to 8V motors as long as a 16V 210mm clutch disc is used. Some early models had 190mm or other clutch and pressure plate setups that are not able to fit the 16V disc. This is fixable by swapping in a 210mm flywheel.

As to clutch release systems, they are cable operated and all the same.

As for electrical connectors? Two different types of backup lite switches. One is huge and fails often. It incorporates the "upshift indicator". The other types have a simple 2 pole switch. The big switch can be jumped on its two terminals that close to operate the backup lites. As a matter of fact, several model VWs have an adapter harness that does this. If you put a tranny in with 2 pole switch in a car with an upshift indicator, you'll have to do without it, but not the backup lites.

As for the flanges that accept the left and right drive axles? 2 sizes (90 & 100 mm) are available. It is sometimes possible to change these, but not always. If your new tranny has 90 mm flanges and isn't clearanced to accept 100mm flanges, you can often get around this by changing the joint size on the inner CV joints. If your new tranny has 100mm flanges, and the axles have 90mm CVs, you can often swap in axles with larger joints. If you don't clearance the spindles on some A1 and A2 cars, you'll have to install hybrid axles with 100mm inners and 90mm outer CVs. Otherwise, your axles might lock up when you tighten the axle nut.

All of this aside, there's one thing you can't change. Mounting possibilities. A1s use 4 mounts and A2s use three. The shifting linkage on both is different and can cause problems if the wrong transmission is chosen. Some 020 trannies have "holes" in the differential to accept A2 linkage. Some trannies have "studs" on the differential to accept the A1s 4th motor mount. Some trannies have BOTH. Know what you need and what you've got.

If you've purchased a transmission with a different sized ring and pinion than was originally in your car, you will need to replace the speedometer drive to the one that corresponds to your current final drive size. These are available at your local Volkswagen dealer.

Part Numbers:

020 3.6= 171 957 821 B (RED)
020 3.9= 171 957 821 A (WHITE)
020 4.25= 171 957 821 C (GREEN)


Contributed By: Lucky on Saturday, May 03 [ Rate this tutorial ]

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