Vibration and Noise Issue

Supershafts said

Im going with you put the joints and didn't index anything and now the shaft needs to be balanced....

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Huh! Index what? The u-joints don't have to be indexed except for putting them in so you can access the grease zerks. I've replaced so many U-joints I couldn't even begin to count them and never had to re-balance the driveshaft.