Knowing what gearbox you’ve got in your air-cooled VW is always a good thing, especially if you’re changing/upgrading the engine. And it always pays to know exactly what gearbox you’re looking at when it comes to buying a used replacement.

The code is located on the side of the box (circled in the photo above). Don’t use the VW part number (113.301.103) as that is the number for that case. What you need is the code below that starts with one of the below letters…


Gearbox Code Engine Size Gear ratios
1/2/3/4
Final drive 
Notes
AA 1200 3.80 / 2.06 / 1.32 / 0.89
4.375
From Chassis No 0 981 810
AB 1300 3.78 / 2.06 / 1.26 / 0.93
4.375
Up to 8/70
AC 1500 3.80 / 2.06 / 1.26 / 0.89
4.125
also some 1300 from 8/70
AD 1200 3.80 / 2.06 / 1.32 / 0.89
4.375
Limited Slip Differential
AE 1300 3.78 / 2.06 / 1.26 / 0.93
4.375
Limited Slip Differential
AF 1500 3.80 / 2.06 / 1.26 / 0.89
4.125
L.S. Differential >8/70; also some 1300 8/70>
AG 1200 3.80 / 2.06 / 1.32 / 0.89
4.375
Type 147 Fridolin
AH 1500/1600 3.80 / 2.06 / 1.26 / 0.89
4.125
IRS from 8/68 – 8/72
AK 1500/1600 3.80 / 2.06 / 1.26 / 0.93
3.875
Type 181
AL 1500-1600 3.80 / 2.06 / 1.26 / 0.93
3.875
Type 181 with LSD
AM 1300 3.78 / 2.06 / 1.26 / 0.93
4.375
Saloon and Cabrio from 8/70
AN 1600 3.80 / 2.06 / 1.26 / 0.93
3.875
Karmann Ghia with IRS from 8/70
AO 1600 3.80 / 2.06 / 1.26 / 0.89
4.125
LSD 8/70 – 8/72
AR 1600 3.80 / 2.06 / 1.26 / 0.89
4.125
LSD 8/70 – 8/72
AR 1600 3.80 / 2.06 / 1.26 / 0.93
3.875
Karmann Ghia with LSD from 8/70
AS 1600(GT) 3.80 / 2.06 / 1.26 / 0.93
3.875
From 3/72
AT 1600 3.80 / 2.06 / 1.26 / 0.93
3.875
1303s and Cabrio from 3/72
AU 1600 3.80 / 2.06 / 1.26 / 0.93
3.875
1303s and Cabrio from 3/72 with LSD
BA 1300/1500 3.80 / 2.06 / 1.26 / 0.93
4.375
Semi Automatic from 8/68 – 8/70
BC 1300/1500 3.80 / 2.06 / 1.26 / 0.93
4.375
Semi Automatic from 8/68 – 8/70 with LSD
BE 1600 3.80 / 2.06 / 1.26 / 0.89
4.125
Semi Automatic from 8/68 – 8/70
BF 1600 3.80 / 2.06 / 1.26 / 0.89
4.125
Semi Automatic from 8/68 – 8/70 with LSD
BG 1300 3.80 / 2.06 / 1.26 / 0.89
4.125
Karmann Ghia Semi Automatic from 8/70
BH 1300 3.80 / 2.06 / 1.26 / 0.89
4.125
K. Ghia Semi Automatic with LSD
BJ 1300 3.78 / 2.06 / 1.26 / 0.93
4.375
Semi Automatic from 8/70
BK 1300 3.78 / 2.06 / 1.26 / 0.93
4.375
Semi Automatic from 8/70 with LSD
DA 1500/1600 3.80 / 2.06 / 1.26 / 0.89
4.125
Type 3 Swing-axle up to 8/68
DB 1500/1600 3.80 / 2.06 / 1.26 / 0.89
4.125
Type 3 Swing-axle up to 8/68 with LSD
DC 1500/1600 3.80 / 2.06 / 1.26 / 0.89
4.125
Type 3 IRS from 8/68
DD 1500/1600 3.80 / 2.06 / 1.26 / 0.89
4.125
Type 3 IRS from 8/68

1/2/3/4 = 1st, 2nd, 3rd and 4th gears respectively.
FD = Final Drive