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D-Overdrive MG MGB Mk 1
Technical Specifications
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MK 1, model years 1963–1967
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Gear ratio: 0.802:1
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Gearbox 3-speed synchro MG MGA
Technical Specifications
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1600 version with flange
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From 15GD engine onward
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Gearbox 3-speed synchro MG MGB Mk 1 (with D-Overdrive)
Technical Specifications
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From model year 1964 onward
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With 18GB engine
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Gearbox input shaft enlarged from 15.75 mm to 21.59 mm
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From model year 1966: four-bearing layshaft and increased shaft diameter
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With D-Type Overdrive
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Gearbox 4-speed synchro MG MGB Mk 2
Technical Specifications
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From model year 1967 with the introduction of the MK 2
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18GD and 18GF engines
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From model year 1974: no more oil dipstick, replaced by oil filler plug
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Gearbox 4-speed synchro MG MGB Mk 2 (with LH overdrive)
Technical Specifications
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From model year 1967 with the introduction of the MK 2
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18GD and 18GF engines
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From model year 1974: no more oil dipstick, replaced by oil filler plug
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With LH-Type Overdrive
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Gearbox MG MGC / MGB GT V8 (with LH overdrive)
Technical Specifications
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Nearly identical to MGB gearbox
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Larger bell housing and different mounting points
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Slightly modified gear ratios
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With LH-Type Overdrive
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Gearbox MG Midget / Austin-Healey Sprite 1098 cc / 1275 cc
Technical Specifications
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Ribbed gearbox casing
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For models with 1098cc and 1275cc engines
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Gearbox MG Midget / Austin-Healey Sprite 948 cc
Technical Specifications
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Smooth gearbox casing
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For models with 948cc engine
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