Aircooled Gearbox Codes

Code	Engine Size	Final Ratio	Model & Chassis Number
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 Differential
AE	1300	4.375	Limited Slip Differential
AF	1500	4.125	L.S. Differential >8/70; also some 1300 8/70>
AG	1200	4.375	Type 147 Fridolin
AH	1500/1600	4.125	IRS from 8/68 - 8/72
AK	1500/1600	3.875	Type 181
AL	1500-1600	3.875	Type 181 with LSD
AM	1300	4.375	Saloon and Cabrio from 8/70
AN	1600	3.875	Karmann Ghia with IRS from 8/70
AO	1600	4.125	LSD 8/70 - 8/72
AR	1600	4.125	LSD 8/70 - 8/72
AR	1600	3.875	Karmann Ghia with LSD from 8/70
AS	1600(GT)	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 8/68 - 8/70
BF	1600	4.125	Semi Automatic from 8/68 - 8/70 with LSD
BG	1300	4.125	Karmann Ghia Semi Automatic from 8/70
BH	1300	4.125	K. Ghia Semi Automatic with LSD
BJ	1300	4.375	Semi Automatic from 8/70
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