Gearbox Codes

General Information - Beetle Gearbox Part Numbers Should start 113 For a Manual Box and 001 for an Auto Box.

The Gearbox Code. Is followed by 5 numbers the first two are the Day the second two are the Month and the fifth is the year. (EG AT22104 was built on 22nd October 1974. 

All Codes are for T1 Beetle unless otherwise stated.

Codes

Model

 Final Drive

Notes

AA   

 1200 4.375 From Chassis No 0 981 810  
AB  1300 4.375   Swing Axle
AC 1500 4.125      also some 1300 from 8/70
AD 1200 4.375 Limited Slip Differential
AE 1300 4.375 Limited Slip Differential
AF 1500 4.125    Limited Slip Differential up to 8/70; also some 1300 from 8/70
AG 1200 4.375 Type 147 Fridolin
AH 1500 4.125      IRS from 8/68  
  1600 4.125    8/69 – 8/72  
AK 1500 3.875 Type 181 up to 8/70
  1600 3.875 Type 181 from 8/70  
AL 1500 3.875 Type 181 with LSD up to 8/70  
AL 1600 3.875 Type 181 with LSD from 8/70  
AM 1300 4.375 IRS - from 8/70  
AN 1600 3.875 Karmann Ghia with IRS from 8/70  
AO 1600  4.125    Karmann Ghia from 8/70  
AP 1300 4.375 LSD from 8/70  
AQ 1600 4.125 LSD 8/70 – 8/72  
AR 1600 3.875  Karmann Ghia with LSD from 8/70
AS 1600cc 3.875 From 3/72  
AT 1600 3.875 1303s and Cabrio from 3/72  
AU 1600 3.875 1303s and Cabrio from 3/72 with LSD  
BA 1300 / 1500 4.375 Semi Automatic from 8/68 – 8/70  
BC 1300 / 1500 4.375 Semi Automatic from 8/68 – 8/70 with LSD  
BE 1600 4.125    Semi Automatic from 8/70 – 8/71  
BF 1600 4.125    Semi Automatic from 8/70 – 8/71 with LSD  
BG 1600 4.125    Karmann Ghia Semi Automatic from 8/70  
BH 1300 4.125    Karmann Ghia Semi Automatic from 8/70 with LSD
BJ 1300 4.375 Semi Automatic from 8/70  
BK 1300 4.375 Semi Automatic from 8/70 with LSD  
BL 1600 4.125 Semi Auto  
BK 1300 4.375 Semi Automatic from 8/70 with LSD  
DA 1500 /1600 4.125    Type 3 Swing-axle up to 8/68
DB 1500 /1600 4.125    Type 3 Swing-axle up to 8/68 with LSD  
DC 1500 /1600 4.125    Type 3 IRS from 8/68  
DD 1500 /1600 4.125    Type 3 IRS from 8/68 with IRS  

Please note that this information is provided as a GUIDE ONLY we cannot be held responsible for any errors.  

For info: Below, are the the gear ratios for all gears in standard gearboxes:

   Identification letters    ring & pinion    1st gear 2nd gear 3rd gear  4th gear
AA AB AD AE AG AM AP AX 4.375 3.78 2.06 1.26 0.93
AC AF AH AQ DA DB DC 4.125 3.78 2.06 1.26 0.89
AN AO AR AS AT AU 3.875 3.78 2.06 1.26 0.93