Gearbox Codes - How To Identify a Gearbox Without One Counting Ring Gear Teeth - VW Beetle Bug

VW Beetle Gearbox Codes. Where to find the gearbox code, and if you cant how to identify what Gearbox you have. Determining Ratios by Counting Ring Gear Teeth. VW Bug. Vosvos Teknik Fusquinha

Ring Gear Teeth / Ratio / Model
#31(8) - 3.875/3.88:1 - (1303s/GT Beetle etc)
#33(8) - 4.125:1 - (1500)
#35(8) - 4.375:1 - (1300/1200)
#37(8) - 4.625:1
#36(7) - 5.14:1
(#37(8) is from the VW Hormiga. The trans code for this is CY. Update thanks to, E-Curb 03/03/22)

CODE MODEL FINAL DRIVE INFO
AA 1200 4.375 From Chassis No 0 981 810
AB 1300 4.375
AC 1500 4.125 also some 1300 from 08/1970
AD 1200 4.375 LSD
AE 1300 4.375 LSD
AF 1500 4.125 LSD to 8/70; some 1300 from 08/70
AG 1200 4.375 Type 147 Fridolin
AH 1500 4.125 IRS from 8/68
1600 4.125 08/69 – 08/72
AK 1500 3.875 Type 181 up to 08/70
1600 3.875 Type 181 from 08/70
AL 1500 3.875 Type 181 with LSD to 08/70
AL 1600 3.875 Type 181 with LSD from 08/70
AM 1300 4.375 IRS - from 08/70
AN 1600 3.875 Ghia with IRS from 08/70
AO 1600 4.125 Ghia from 08/70
AP 1300 4.375 LSD from 08/70
AQ 1600 4.125 LSD 8/70 – 08/72
AR 1600 3.875 Ghia with LSD from 08/70
AS 1600 3.875 From 03/72
AT 1600 3.875 1303s and Cabrio from 03/72
AU 1600 3.875 1303s and Cabrio from 03/72 with LSD
AV 1600 4.125 Type 181 IRS (Update thanks to, E-Curb 03/03/22)
AW 1600 4.125 Type 181 IRS with LSD (Update thanks to, E-Curb 03/03/22)
BA 1300 / 1500 4.375 Semi Auto from 08/68 – 08/70
BC 1300 / 1500 4.375 Semi Auto from 08/68 – 08/70 with LSD
BE 1600 4.125 Semi Auto from 08/70 – 08/71
BF 1600 4.125 Semi Auto from 08/70 – 08/71 with LSD
BG 1600 4.125 Ghia Semi Auto from 08/70
BH 1300 4.125 Ghia Semi Auto from 08/70 with LSD
BJ 1300 4.375 Semi Auto from 08/70
BK 1300 4.375 Semi Autom from 08/70 with LSD
BL 1600 4.125 Semi Auto
BK 1300 4.375 Semi Auto from 08/70 with LSD
DA 1500 /1600 4.125 Type3 Swing-axle to 08/68
DB 1500 /1600 4.125 Type3 Swing-axle to 08/68 with LSD
DC 1500 /1600 4.125 Type 3 IRS from 08/68
DD 1500 /1600 4.125 Type 3 IRS from 08/68 with IRS

I've tried to confirm these are correct using info from online forums and reference checking the following sites (thankyou) but it is possible there may be errors:
https://www.partsemporium.co.uk/GUIDE%20Gearbox%20codes%20vw%20beetle%20ghia.htm
https://www.heritagepartscentre.com/uk/vw-aircooled-gearbox-codes

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