I am concerned ONLY with a driving test for CDL. No one told me about step 3--as thought it is a separate thing to do IN BETWEEN. And why would I be slowing down to the RPM required when I am shifting up??? Are the UP and DOWN RPMs reversed?
The following is right out of the 2015 manual, page 2-9 (except I numbered my lists).
Basic Method for Shifting Up. Most heavy vehicles with manual transmissions require double clutching to change gears. This is the basic method:
Shifting gears using double clutching requires practice. If you remain too long in neutral, you may have difficulty putting the vehicle into the next gear. If so, don't try to force it. Return to neutral, release clutch, increase engine speed to match road speed, and try again.
- Release accelerator, push in clutch and shift to neutral at the same time.
- Release clutch.
- Let engine and gears slow down to the rpm required for the next gear (this takes practice).
- Push in clutch and shift to the higher gear at the same time.
- Release clutch and press accelerator at the same time.
Knowing When to Shift Up. There are two ways of knowing when to shift:
Use Engine Speed (rpm). Study the driver's manual for your vehicle and learn the operating rpm range. Watch your tachometer, and shift up when your engine reaches the top of the range. (Some newer vehicles use "progressive" shifting: the rpm at which you shift becomes higher as you move up in the gears. Find out what's right for the vehicle you will operate.)
Use Road Speed (mph). Learn what speeds each gear is good for. Then, by using the speedometer, you'll know when to shift up. With either method, you may learn to use engine sounds to know when to shift.
Basic Procedures for Shifting Down
- Release accelerator, push in clutch, and shift to neutral at the same time.
- Release clutch.
- Press accelerator, increase engine and gear speed to the rpm required in the lower gear.
- Push in clutch and shift to lower gear at the same time.
- Release clutch and press accelerator at the same time.
Double clutching described by Missouri: Is it accurate?
Discussion in 'Questions From New Drivers' started by Dreamboat, Aug 23, 2015.
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Sounds about right. Only thing I can a suggest is not to shove your foot to the floor. Just push the pedal 1/4 way or so. After a couple hundred tries it'll become easier.
I learned to float gears first then I learned how to double clutch. I learned to use my eyes and mind to focuse on the speedo and timing the gear change. Then after all that was down I started practicing double clutch which was fairly easy. -
That's way too much thinken for me,lol.I'm in second I double clutch as im shifting to 3rd so on and so forth.Once you get your own trk or even in trainers trk and get comfortable driving it,double clutching will come easy because you know your trk.
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Just round all those pesky parts off, eventually it won't grind anymore.
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I have my test tomorrow and am reviewing the manual.
Floating has to wait until AFTER the test. -
By law schools have to train double clutching but once you get good at shifting you'll probably float the gears meaning you won't need the clutch but to start, slow down, and stop.
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Starboyjim and Dreamboat Thank this.
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I've got an 8LL in my truck, just float down to low then lo-lo on the split -
lots of character Thanks this.
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lots of character Thanks this.
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