Depends on the setup, my aotushift Mack was setup to allow 3rd gear start when bobtail, 2nd gear max for everything else. Typically, any load I started in first, skip shifted to 3rd. When empty, would start off in 2nd, then skip to 4th. As of tomorrow I'll be in an M-Drive tractor that bobtail starts off in 4th gear, computer sense loads and selects gears or allows me to.
Why do alot of people dislike auto trucks please explain
Discussion in 'Questions From New Drivers' started by Brandon1984, Jan 31, 2015.
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kuzima93 Thanks this.
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As a case in point, I could have started my post to you with, ARE YOU STUPID? I AM PRETTY SURE YOU ARE STUPID. But I did not start it off that way. Do you see the difference?rank Thanks this. -
It will show on the display the preselected starting gear.
The little arrows indicate you can manually select a higher starting gear if you want.
Now I manually put it in 1st to take the pic to show an example but since I'm empty and the suspension pressure is telling the ecu I'm empty (or really light), the transmission automatically is putting itself in 5th.
On the flip side it's offering you the opportunity to start in a lower gear.
When cruising, if the cruise rpm is below 1300, it will show you can drop a gear to bring the revs up to around 1500 for a power boost. It's programmed to keep the engine revs in the "green" zone (sweet spot)
My truck is an XE package so at 65 mph, it's loafing along at 1150 rpm.
When going down hill, it will show you can drop more gears despite the fact that will cause the rpms to exceed the sweet spot in order to get better engine braking capability.
The Volvo Engine Brake handle with the I shift has 5 positions. Off, Auto, 1, 2,3 and B.
In auto, the cruise will automatically apply the engine brake when you exceed the brake cruise speed, which by default is set to 3 mph above the cruise speed. (The lowest speed difference you can select is 2 mph and the highest is 10 mph) The engine will automatically downshift to increase braking power as needed, up to 2100 rpm.
When descending a hill, pressing the speed up or down button on the engine brake lever will set the brake cruise speed at your selected speed and the engine and transmission will automatically modulate engine brake speed and gear speed to maintain that speed.
For example if your loaded to 79000 and going down Cabbage, if you bring your truck to the descent speed recommendation of 18 mph and set the brake cruise, the brake and transmission will work together to keep your truck at that speed all the way down without you having to do anything.
When you select 1 or 2, it applies the engine brake at low or medium in whatever gear you are in. Selecting 3 will put the engine brake in high mode and automatically drop one gear to increase rpm and braking power. Holding the lever in B for one second causes the transmission to select the highest gear possible for maximum engine braking, pretty nifty when hitting an exit ramp.'olhand Thanks this. -
...sounds like an overly-complicated means for replacing experience with technology, thereby allowing anybody with a pulse to hold the steering wheel and try to keep it between the ditches. Just remember, when a job can be had with "no skills or experience necessary", the pay will reflect the deeper pool of applicants now "qualified" for the position.
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They said the same thing when Clessie Cummins was working on the compression brake. -
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But there might be another reason for autos. My neighbor bought a new Volvo a while ago.. he said he went into a corner a little too hot for the trucks liking and the truck hit the jakes and slowed down all by itself. I've never given much thought to rollover protection but I'm pretty sure rollover protection will only work with an auto (or else the truck might stall).
If the gov't ever mandates rollover protection, that might well spell the end of manuals. -
rank Thanks this.
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I drove a utrashift for 3 years it had its good points and its bad points. I travel alot of dirt roads in my job and it would get stuck if a grasshopper pissed in front of it. There is no coast while backing up to a dock takes a little getting use to but not to bad. In town driving it beats a manual hands down. I would catch alot of crap for driving a auto I would just drive off with my left foot hanging out the window and let them know there number one with the special finger
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