Quote:
Originally Posted by brado
in tractor trailors you never have to use the clutch unless you are stopped. i dont know if its the same with cars though.
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They often have straight cut gears and/or no synchros. That's why they can shift without using the clutch without damaging anything. If you can rev match properly you can shift without it.
On a car with synchros (pretty much all production passenger vehicles) this is REALLY BAD for them. Syncros are typically brass or similar (read: soft) and shifting under stress chews them up.
Shifting into neutral without the clutch, on the other hand, doesn't damage anything. They synchros don't do anything when you pull it out of gear, just when you're putting it in.