External Gearbox Identification
Numbers are found on casing below oil filter area
Mini 850 style with gearlever at firewall
Casing numbers for early brass synchro cone  22A104,  22A363
Casing numbers for later baulk ring 3 SYN  22G68,22A1288,22G382
 
Mini Deluxe and Mini Cooper  3 Synchro with alloy extension housing
Casing numbers Cast In . 22A1288, 22A1522, 22G190, 22G333, 22G68
The Morris 1100 sedan had a similar gearbox with the extension housing
bolted to the case with a rubber sandwich plate
 
Mini K and Cooper S mk11 All synchro  Remote (extension) housing
Casing Numbers   22G1128,  22G846
 
Rod Change All (4) Synchro   2 Rods for Gearshift  1974 on
Usually Pot joint inner universals
Casing number for small idler bearing system DAM3220, 22G1832
Casings with larger idler bearings DAM2886,DAM4818,DAM5626  all are 78 on
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