You need to get the timing right, and I can't tell you much about the Benz, since I have never even started 1 up. You should probably be up shifting sooner in the lower gears, 16 to 17 hundred is about right for the top range. Heavy loads going uphill, you shift at a higher rpm than downhill, and,or light loads. Timing depends on how fast the motor speeds up or slows down when going on and off throttle.
Downshifting you can drop 2 gears if you get it down around 1100 the Benz should wind right up to over 2000 when downshifting. Pulling hills you should downshift at probably 1300 rpm unless you are near the top, ! gear at a time with a 10 speed.
shifting eaton fuller 10 speed
Discussion in 'Questions From New Drivers' started by localtrucker, Dec 5, 2008.
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thanks for all the advice here guys, I quess i have to work on my timing a little more. Some days I feel i can shift like I have been doing it for years and the next day feel like it was the first time...gets frustrating some days I tell ya. I was hoping someone could give me the shiftpoints for each gear on the 10 speed, I think I have a good Idea but it would help me understand it more if I knew for sure the shiftpoints on the downshift tenth...ninth...eigth and so on. I hope you understand where I am going with this...Is there a certain sound that you listen to when upshifting, like a whine to the engine if so is that when I should be upshifting to the next gear...Also I try to shift between 1500 and 1700 rpm, I seem to have to pay close attention to the tach or I seem to over shoot the rpm for that gear.
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Coonass, everyday we take out a different trailer, anything from a pup (28'6") to a 48' to a empty dump ( were not allowed to raise or lower it). And like I said, the road truck is governed, it "tacks out" at 1500 rpm.
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In school, we only pulled vans, but some were loaded w/barrels of sand.(20000# or so)
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I was taught in truckdriving school to up shift from 1600rpm to 1200rpm. every time you down shift you shift from 1200rpm to 1600rpm I hope this helps
Last edited: Dec 6, 2008
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Start out in a gear that will result in a smooth, easy start without slipping the clutch. Use just enough rpm to pick up the next gear. Shift early and use progressive shifting or progressively more rpm in each gear as more power is required. Progressive shifting saves fuel and brings the truck up to speed more quickly since shifting at a lower rpm reduces the time necessary to change gears.
In traffic and through towns, use the highest possible gear that allows room for maneuvering. This reduces noise and minimizes gear shifting.
These suggestions were published in Heavy Duty Trucking, 11/85, page 84. Low rpm engines had appeared in the mid 1970s after the first Arab oil embargo. Drivers who claim they can tell when their engines are happy are usually using more rpm, and more power than necessary.localtrucker Thanks this. -
well I will just keep on doing what I am trying and things should get better hopefully. On the dwnshift I am downshifting around 1000 to 1100 rpm is that to low of rpm to shift at? It usually will slide right out of gear and I just shoot a little fuel 200 to 400 rpms and it seems to go into the next lower gear. Is that a proper way of doing this?
my truck is rated 450hp/1900 rpm. I am asking these questons I quess because I never had anyone teach me nor went to school, been trying to learn on my own. thanks to all for the replys, keep them coming if you can help me more, thanks all again for the advice -
I agree with you on this one. Running the engine up against the peg is not good. I move the truck in the gear like you do but with no increase in rpm. If you apply any torque while starting out sooner or later you'll twist the the drive shaft or break something else in the drive line. On down shifting I select the gear that matches the road speed. If I'm going to coming to a stop I'll just let the engine idle down and skip a few gears then stop. Using the clutch to shift is not a bad thing. In fact I recommend it until you really know the truck. Under load you can bang a gear and it can cuase damage. I don't mean gringing I mean when you miss completely and it bangs out of gear. Floating gears does not make you a truck driver. So save the equipment until you know how it works.heyns57 Thanks this. -
Sometime instead of watching your tach when you down shift, just start raising your fuel slowly. Keep raising it and holding the shifter towards the gear you want to go. You will feel it wanting to go in gear. Finially it will just drop in. You can't go too fast raising the fuel though.heyns57 Thanks this.
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