Aircooled VW Gearbox Codes

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AA 1200 4.375 From chassis No 0 981 810
AB 1300 4.375 up to 8/70
AC 1500 4.125 Also some 1300 from 8/70
AD 1200 4.375 Limited Slip Diff
AE 1300 4.375 Limited Slip Diff
AF 1500 4.125 Limited Slip Diff 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 Trekker up to 8/70
1600 3.875 Type 181 Trekker from 8/70
AL 1500 3.875 Type 181 with LSD up to 8/70
1600 3.875 Type 181 with LSD from 8/70
AM 1300 4.375 Saloon and Cabriolet from 8/70
AN 1600 3.875 KG with IRS from 8/70
AO 1600 3.875 KG from 8/70
AP 1300 4.375 LSD from 8/70
AQ 1600 4.125 LSD 8/70 - 8/72
AR 1600 3.875 KG with LSD from 8/70
AS 1600 3.875 Type 1 from 8/72
AT 1600 3.875 1303s and Cabriolet from 8/72
AU 1600 3.875 As above with LSD
BA 1300/1500 4.375 Semi-auto from 8/68 - 8/70
BC 1300/1500 4.375 As above with LSD
BE 1600 4.125 Semi-auto from 8/70 - 8/71
BF 1600 4.125  As above with LSD
BG 1300 4.125 KG with Semi-auto from 8/70
BH 1300 4.125 As above with LSD
BJ 1300 4.375 Semi-auto from 8/70
BK 1300 4.375 As above with LSD
DA 1500/1600 4.125 Type 3 swingaxle up to 8/68*
DB 1500/1600 4.125 As above with LSD*
DC 1500/1600 4.125 Type 3 with IRS from 8/68
DD 1500/1600 4.125 As above with LSD

*Note that reinforced swingaxle design was available on post - 8/68 Type 3 models as an option (M263)
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