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1
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3 synchro gearbox, outer - Spitfire MK3
From chassis number FD1 to FD92803 (January 1967 to November 1970) - gearbox code: FD. Characteristic: 3 rail type
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2
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3 synchro gearbox, inner - Spitfire MK3
From chassis number FD1 to FD92803 (January 1967 to November 1970) - gearbox code: FD. Characteristic: 3 rail type
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3
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4 synchro gearbox, outer - Spitfire MK4
From chassis number FH3 to FH64995 and from FM1 to FM28000 (November 1970 to December 1974) - gearbox code: FH or FK. Characteristic: 3 rail type
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4
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4 synchro gearbox, inner - Spitfire MK4
From chassis number FH3 to FH64995 and from FM1 to FM28000 (November 1970 to December 1974) - gearbox code: FH or FK. Characteristic: 3 rail type
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5
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4 synchro gearbox, outer - Spitfire 1500
From chassis number FH75001 and from FM28001(December 1974) - gearbox code: FR or FT. Characteristic: single rail type
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6
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4 synchro gearbox, inner - Spitfire 1500
From chassis number FH75001 and from FM28001( December 1974) - gearbox code: FR or FT. Characteristic: single rail type
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7
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'D' type overdrive, outer - Spitfire MK3 and early MK4
To chassis no. FH60000 and FM10000 (January 1967 to August 1973)
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8
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'D' type overdrive, inner - Spitfire MK3 and early MK4
To chassis no. FH60000 and FM10000 (January 1967 to August 1973)
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9
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'J' type overdrive, inner - late Spitfire MK4 and all 1500
From chassis no. FH60001 and FM10001 (August 1973)
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10
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'J' type overdrive, inner - late Spitfire MK4 and all 1500
From chassis no. FH60001and FM10001 (August 1973)
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11
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Gearbox and Overdrive mountings