VW Aircooled Gearbox Code Reference Table

VW Aircooled Gearbox Code Reference Table

Aircooled VW T1 (and T2 Split Screen) Gearbox Reference Table

All Data for Years, Ring and Pinions, Conversions and Final Drives for Aircooled T1 Transaxles, Swing Axle and IRS

 

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

 

Final Drives and Ring and Pinion Info

Ring and Pinion (Crown and Pinion, Combinations and Origins, Also Known as Final Drive)


- 4.375 T1 (1200-1300cc Gearboxes)
- 4.125 T1 (1300-1500cc Gearboxes (Also Most Split Screen Reduction Box Units))
- 3.880 T1 (1600cc Gearboxes)
- 3.440 T1 (Never originally available, reproduction only)

Note: Reduction box combinations will reduce final drive by ratio, check your year and ratios to calculate.

- 4.571 T2 (082, 091 Boxes) Some 5 and 6 Rib Only
- 4.857 T2 (Oddball Year)
- 5.375 T2 (1600c T1 Engine Bay Windows)
 

4th Gear Available Combinations


Gears in certain cases can be crossed between boxes, note currently keyed shaft boxes have no available new R&P combinations since Brazil ceased production, all current final drive sets are splined (late) only.

- 0.91
- 0.889
- 0.821
- 0.770
 

All Data for Years, Ring and Pinions, Conversions and Final Drives for Aircooled T2 (002, 091) Transaxles

 

VIN 4th gear ratio R&P ratio R&P * 4th
218 000000 - 211 2 276560 0.821 5.375 4.413
211 2 276561 - 213 2 068547 0.821 5.375 4.413
213 2 068548 - 213 2 300001 0.889 5.375 4.778
214 2 000001 - 215 2 300001 0.889 4.857 4.318
216 2 000001 - 219 2 300001 0.889 4.571 4.064


Gearbox Ribs Explained (Applicable to T2 Bay Window Gearboxes only, does not work for T25 Vanagon). 


If you are unsure if you have a T2 Bay Window Gearbox, it is easy to tell by where the gear linkage comes out. On a Bay Window Gearbox it comes straight out the back (opposite end to the bellhousing). If it is a T25 box it will come out of the side on the nosecone.

1600cc - 3 Ribs
1700cc - 5 Ribs
2000cc - 6 Ribs
 

Note:  The terms 002 and 091 gearboxes comes from the first 3 digits on the code found on the underside of the gearbox.

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