down shifting and grinding gears
#11
Senior Board Member
Join Date: Sep 2005
Location: Redneckistan
Posts: 2,831
there are two primary problems with the "new guy" and downshifting. The most common is not using the brakes effectively enough to get and KEEP the rpm down for the downshift. Be a little more firm on the brakes and GET the pm down. sometimes people "scrub" the brakes until their rpms drop a little and then go for the shift in a hurry.. they usually are not really in control of the truck, gravity is. Use the brakes and DRAG the rpms down and then make the shift. Use the tachometer! All downshifts are made at the exact same rpm. It's not progressive, like up shifting. EVERY shift is (for example) can be made at 1000 rpm.get the rpm down tap into neutral, RELEASE THE CLUTCH, WICK the rpm up "smartly" and when the rpm are around 300 rpm (1300) tap the clutch and quickly drop into the next gear.
The second most common problem is trying to make these shifts with the clutch in or while going too deep into the clutch! You have to act like the clutch pedal is a hot iron. you TAP the clutch, these things shift pretty easily without the clutch so it's usually a problem with clutch miss-use rather than anything else. The only time you push the clutch in further than a few inches is when you are almost stopped, or when you are stopped trying to get the truck into gear. Once the truck starts to move, pretend that the clutch pedal is an hot iron. Also.. TALK TO YOURSELF! Set up a "chant" and follow it through. IT WORKS! It may seem silly, but it does work.
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#12
Board Regular
Join Date: May 2006
Location: Tallahassee, Fl
Posts: 329
This is going to sound strange, and i wouldn't recommend it as a procedure you use in school, but i'll tell you anyway.........Here goes, hopefully i can make sense with it. When you get on your own, and begin to feel confident, and learn how to "float" your gears, try braking with your left foot, this will allow a nice steady braking, and use your right foot for accelerating out of gear and in turn raising your RPM's to make the downshift, i see so many guys trying to rush the downshift, using your right foot to accelerate out of gear, hoping like hell you get it in first try, and then if not you rush over to hit the brake to slow you down, and then you try the process all over again. I know it might seem weird, but i came across it in an "old timers" article over on layover.com, and i've been using this method of controlled braking and downshifting ever since, i don't clame to be perfect at what i do, but i sure know that it smooths everything out. Maybe some others out there are using this technique also, and can let me know of more success stories.
#13
The method I use is I put my right foot half on the brake and half on the throttle, and while using the brake to slow down, I work the throttle at the same time. I don't use the clutch, just break the torque and bring the shifter to the desired gear while braking & adjusting RPM's, and it slides right in, smooth as silk. Repeat as necessary to work your way down thru the gears.
Sounds just like an automatic downshifting. Try it, you'll like it!!!!
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If you can't shift it smoothly, you shouldn't be driving it.
#14
Senior Board Member
Join Date: Sep 2005
Location: Redneckistan
Posts: 2,831
Those techniques are probably not going to be anywhere near acceptable to the instructors or the state examiners. You have to show an ability to properly operate the controls.. and that ain't it!!!
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#15
Member
Join Date: Nov 2005
Location: Indiana
Posts: 186
If you mean shifting into the wrong gear as in this example..Say your in 5th gear and you want to go to 4th. You press the clutch, shift to neutral, raise rpms and then move the shifter to far over and accidentally try to go into 2nd instead of 4th.
If something similar to that example is what your having problems with see if the instructor will let you practice on the range for about an hour or so of nothing but repeated upshifting and down shifting. I'll bet it won't take long for you to get the feel of how far to move the shifter between the gears. good luck
#16
Originally Posted by Fozzy
Those techniques are probably not going to be anywhere near acceptable to the instructors or the state examiners. You have to show an ability to properly operate the controls.. and that ain't it!!!
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If you can't shift it smoothly, you shouldn't be driving it.
#17
Senior Board Member
Join Date: Sep 2005
Location: Redneckistan
Posts: 2,831
Your not trying to learn how, nor are you trying to gain the knowledge to pass the skills test.
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#18
Rookie
Join Date: Mar 2007
Posts: 10
its been 6 weeks and i am still having trouble on down shifting the instructor told this week if i am not improve i well be down grade me to D licen which relay got me upset after all the hard ship and the money invested and the time it come to this is there any way that i can improve my down shifting up shifting is excellent according to him and most time when i down shift i go to the wrong gear and grind the gear . other thing he said i drive too slow for the traffic .
i am starting getting really cranky i don't know what to do please help thanks
#19
Rookie
Join Date: Mar 2007
Posts: 10
And another piece of advice unless someone is helping you diagnose the problem taking other peoples advice on what RPM's to use is WRONG. Everyone has their own style of shifting take forinstance I shift quicker so I use a lower rpm cause i get it to the hole quicker some people may use a higher rpm cause they shift slower. Timing, timing, timing. The only way to fix the problem is to diagnose it, use what I had told you and try some diffrent things you will figure it out.
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