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Classic Austin Mini Primary Gear 1275

Classic Austin Mini Primary Gear 1275

Classic Austin Mini Primary Gear 1275
Alternate Products
Classic Austin Mini Pre-a+ Primary Gear, Floating Bush Type
$299.95 Classic Austin Mini Pre-a+ Primary Gear, Floating Bush Type
Classic Austin Mini Front Bushing Primary Gear 1300
$25.95 Classic Austin Mini Front Bushing Primary Gear 1300
The 'primary gear' in a Mini application is the critical gear which the clutch rides on. It is the first gear that connects the power from the engine to the trans. These helical cut gears take a lot of abuse over the years and while the teeth seldom fail, the bushings are always worn. All 1275cc engines use the same gear dimentionally but they are not all interchangable. The 22G1053 gear is the stock one used in all 1275cc engines until the advent of the A+ design. These gears do NOT have a groove cut into the center of the gears.
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Related Technical Articles:
ENGINE TRANSPLANTS - Engine to gearbox fitment
Created: November 01, 2000
Assembling the engine to gearbox (transmission) is explained and simplified in this article. Contrary to popular mis-guidance, all BBUs will fit all four-syncro gearboxes. It was only the three-syncro boxes that varied in casting dimensions causing hassles where 1275s were applied to 850/998 gearbox casings. The longer throw and bigger crank and rod assembly dimensions fouled the sculpted areas in the gearbox case,
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