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Does anyone know if you can mix fixed & sliding half primary sheaves between TRA 3 & TRA 5, I noticed the part numbers are different between the fixed halves and wondering what the difference is?
 

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Tra 3 is splined tra 5 is tapered. Can't mix fixed half. As long as you use a matching governor cup to the fixed half it should work. Best to have it rebalanced just in case though.
 
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