A Type Gears
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LabelPart NamePart No.
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4Layshaft, (Hi spec alternative) was 22A1371C-22A1731
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6Layshaft bearings88G396
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121st motion ball bearing2A3709
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143rd motion shaft (mainshaft)22G70
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152A3712
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15Mainshaft double ball bearingAAU1365
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16Spring ring for double ball bearing was 22G721ADU4992
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18Synchronizer ballBLS107
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19Synchronizer spring22A367
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233rd gear (23 teeth) 850cc22A583
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27LocktabDAM4000
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28Nut for 1st motion shaft2A3548
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29Idler gear, shaft size .750” (19mm)22G943
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30Idler gear thrust washer .130”-131” (3.30-3.32mm)22A1545
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30Idler gear thrust washer .132”-133” (3.35-3.37mm)22A1546
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30Idler gear thrust washer .134”-135” (3.40-3.42mm)22A1547
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30Idler gear thrust washer .136”-137” (3.45-3.47mm)22A1548
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30Idler gear thrust washer .138”-139” (3.50-3.53mm)22A1549
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31Final drive pinion22A399
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32LocktabDAM6140
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33Mainshaft nut22G48
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34LocktabDAM2377

Most of the gears are no longer available, part numbers for reference only.
Diff Ratio | Mini | Mini Pinion No.1 | Mini Spindle No.8 | ||||
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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 | |||
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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 |