ZF-5? That's a synchronized transmission, no need for double-clutching. I do double-clutch the new diesel Dodge 3500s with the 6-spd NV5600, and I also float them as well, but that's just cause not many of the folks at work can do it, and I'm a show-off, and they are test vehicles anyways so they live very short then get destroyed even if there ain't nothing really wrong with them - in other words, I try to justify the inevitable untimely death of these nice tucks  Whether double-clutching is actually bad for a synchronized transmission, that I dunno, but I'd sure would like to learn about...
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The more I drink, the more I drink, the more I drink...
'90 F350 XLT Lariat, reg cab, dually, 4.10s, factory tow package, Chevy hydroboost conversion, P3 brake controller - the Hay Express
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