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2003 jcw transmission

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Old Mar 3, 2024 | 02:22 PM
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2003 jcw transmission

Bought a 2003 Mini Cooper S JCW, it's a 6 speed manual transmission, is the transmission different between the S and JCW? Or will any transmission from an S will fit?
 
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Old Mar 3, 2024 | 02:27 PM
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2002-2006 6-speed transmissions will definitely fit. The only differences between an S and JCW were minor parts of the engine (larger valves, 11% reduction pulley, etc.).
 
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Old Mar 4, 2024 | 05:11 AM
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Originally Posted by cooper48
2002-2006 6-speed transmissions will definitely fit. The only differences between an S and JCW were minor parts of the engine (larger valves, 11% reduction pulley, etc.).
Is it true the JCW has larger valves - I've read the only difference between heads was some mild port work?
 
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Old Mar 4, 2024 | 06:14 PM
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The JCW exhaust valves were slightly larger than the S.
 
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