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Re: double-clutching: now here's a topic I can speak on. (20 years in big trucks) Most of the time in big trucks, I never used the clutch (except for launching or stopping). When the speed is matched to the rpm, it falls into gear. Period. Double clutching is not necessary in a car - unless - you fail to match the rpm needed for the next gear (hence - "blipping the throttle."). Want to get proficient at shifting? Go find an old B-Model Mack truck and learn to shift a 15 speed tri-plex without the clutch!
It's all about rpm's, my son.
You don't double clutch because you don't use the clutch. When shifting with the clutch, however, "blipping the throttle" with the clutch depressed doesn't do anything because the tranny input shaft is disconnected from the engine. If you momentarily release the clutch while "blipping", however, the input shaft will speed up and let you shift. That's what double clutching is about.
I'd note that you *can* shift the Corvette without using the clutch, just as PROFESSORO does with his big truck. But you need to be very very good, with impeccable timing. Because both the inertia of the car and the inertia of the gears in the Corvette are much less than in a big truck, your timing has to be *just* right to pull it off. It is lots easier to do in a big truck where the speeds don't change very rapidly.
Unless you really abuse the gearbox, the synchros will still last for the entire life span of the car (With exception of the odd weak designs).
I've rebuilt too many manual transmissions to buy into that.
You can do even faster downshifts without double clutching! And you can do it without grinding or any other form of gearbox abuse, even when you skip a gear or two. You can "drive it, like you stole it", and do it well, without double clutching.
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Try going from 5th at 60 MPH to 2nd without double clutching, then get back to me.
yes, you can definately shift without clutching, it just takes really good timing on these cars. i did it in my c5 many times. i havent tried it on my c6, but it should be about the same.