A Type Gears
Label Part No Description Quantity Comments
1 22A377 Reverse gear 1 C.W.E
2 88G209 Reverse gear shaft 1 N.L.A
3 2A3475 Reverse gear bush 1 N.L.A
4 C-22A1731 Layshaft, (Hi spec alternative) was 22A1371 1
5 22G76 Laygear for 997cc to 9FSA 28575 1 N.L.A
5 22G197 Laygear for 997cc to 9FSA 28576 on - 997cc 1 N.L.A
5 22G204 Laygear but uses B type, 1st & reverse 22A1021/22G202 1 N.L.A - All Cooper and ‘S’
5 22A381 Laygear 850cc 1 N.L.A
6 88G396 Layshaft bearings 2
7 22G277 Spacer sleeve for bearing 1 C.W.E
8 22G278 Internal circlips for laygear 2 C.W.E
9 88G324 Laygear small thrust washer 1 N.L.A
10 88G325 Laygear large thrust washer .123”-124” 1 C.W.E
10 88G326 Laygear large thrust washer .125”-126” 1 N.L.A
10 88G327 Laygear large thrust washer .127”-128” 1 N.L.A
11 22A416 1st motion shaft to 9F/SA 28575 - 997 only 1 N.L.A
11 22A588 1st motion shaft (19 teeth) 85Occ 1 N.L.A
11 22A592 1st motion shaft (20 teeth) for 22G204 laygear 1 N.L.A - Cooper ‘S’
12 2A3709 1st motion ball bearing 1
13 2A3711 Clip for 1st motion ball bearing 1 N.L.A
14 22G70 3rd motion shaft (mainshaft) 1 N.L.A
15 2A3712 Mainshaft double ball bearing, early pre 1962 - 62mm diameter 1 N.L.A
15 AAU1365 Mainshaft double ball bearing 1 65mm diameter
16 ADU4992 Spring ring for double ball bearing was 22G721 1 N.L.A
17 22G440 1st/2nd synchronizer gear hub 1 N.L.A
18 BLS107 Synchronizer ball 3 Per hub
19 22A367 Synchronizer spring 3 C.W.E - Per hub
20 22G2033 Baulk ring 3
21 22G194 2nd gear (28 teeth) fits 22G204 laygear 1 N.L.A
21 22A582 2nd gear (28 teeth) 850cc/997cc 1 N.L.A
22 2A3298 Bush for 2nd gear 1 N.L.A
23 22A415 3rd gear to 9F/SA 28575--997cc 1 N.L.A
23 22G195 3rd gear (24 teeth) 997/998cc 9F/SA 28576 on 1 N.L.A - all ‘S’ 22G204 laygear
23 22A583 3rd gear (23 teeth) 850cc 1 C.W.E
24 2A3290 Bush for 3rd gear 1 N.L.A
25 22G97 3rd/4th synchronizer assembly, was 22G358 1 N.L.A
26 2A3545 1st motion drive gear, use [LINK]22G849[/LINK] with spacer [LINK]C-STR239[/LINK] 1 [LINK]22G849[/LINK] C.W.E
27 DAM4000 Locktab 1
28 2A3548 Nut for 1st motion shaft 1
29 22G943 Idler gear, shaft size .750” (19mm) 1 Was equal shaft length
30 22A1545 Idler gear thrust washer .130”-131” (3.30-3.32mm) 1 Green coding
30 22A1546 Idler gear thrust washer .132”-133” (3.35-3.37mm) 1 Black coding
30 22A1547 Idler gear thrust washer .134”-135” (3.40-3.42mm) 1 White coding
30 22A1548 Idler gear thrust washer .136”-137” (3.45-3.47mm) 1 Blue coding
30 22A1549 Idler gear thrust washer .138”-139” (3.50-3.53mm) 1 Red coding
31 22A399 Final drive pinion 1 3.76 ratio
32 DAM6140 Locktab 1
33 22G48 Mainshaft nut 1
34 DAM2377 Locktab 2
35 2A3714 Locating plate shim .003” thou, use [LINK]GUG705645GM[/LINK] 1 C.W.E
35 2A3715 Locating plate shim .010” thou, use [LINK]GUG705646GM[/LINK] 1 C.W.E
Most of the gears are no longer available, part numbers for reference only.
Diff Ratio Mini Mini Pinion No.1 Mini Spindle No.8
Teeth Colour Part No. Teeth Colour Part No.
2-76 1275CC MPI (Special pairing 15x7) 15 Black TXD10004 7 Yellow TXF10001
2-95 998cc - Mini City E - Engine no. 99H 997P 17 Plain 22A1881 7 Blue DAM6028
3-1 12”wheel - 998cc high comp. Ratio & 1275cc 1990-96 except Cooper SPI 17 Plain 22A1881 7 Blue DAM6028
3-1 Cooper SPI only (special pairing 18x7) 18 Grey TXD10006 7 Red TXF10004
3-2 ERA turbo Mini 16 Yellow DAM8074 5 Red 22G2022
3-4 & 3-76 All Mini pre 1984, 1275GT with 10” & 12”wheels and 3.65 ratio 17 Plain 22A1881 6   2A3720
3-4 12”wheel, 998cc - 1984on, low comp. Plus F16 high compression engine 16 Green DAM2905 6   2A3720


Metro Metro Pinion No.1 Metro Spindle No.8 DIFF RATIO Notes
Teeth Colour Part No. Teeth Part No.
Pre 1984 18 teeth Red 22G2024 5 teeth 22G2022 3-64 998cc except economy
17 teeth Green DAM2904 5 teeth 22G2022 3-44 998cc HLE / 1275cc
18 teeth Blue DAM6365 6 teeth 2A3720 3-1 998cc / 1275cc economy
1984 to 1988-99H/A,B,C Eng No 18 teeth Red 22G2024 5 teeth 22G2022 3-64  
18 teeth Blue DAM6365 6 teeth 2A3720 3-1 Economy
99H/D,E engine numbers 1988 on 18 teeth Red DAM8079 5 teeth 22G2022 3-64  
18 teeth Blue DAM8075 6 teeth 2A3720 3-1  
12H/A,B,C engine numbers - 1984 to 1988 17 teeth Green DAM2904 5 teeth 22G2022 3-44 MG and standard
17 teeth Plain 22A1881 6 teeth 2A3720 2-95 Economy
16 teeth Green DAM2905 5 teeth 22G2022 3.2 MG Turbo
12H/D engine numbers 1988 on 17 teeth Green DAM8073 5 teeth 22G2022 3-44 MG/Sport/GTA - 13” wheels
17 teeth Plain DAM8078 6 teeth 2A3720 2-95 Economy
16 teeth Yellow DAM8074 5 teeth 22G2022 3-2 MG Turbo - 13” wheels