18 speed shifting questions

Discussion in 'Experienced Truckers' Advice' started by randomname, Jan 17, 2015.

  1. randomname

    randomname Light Load Member

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    Hello,
    I have been driving for a year. I have gotten pretty good with 9 and 10 speeds and can up and downshift pretty smooth, both DC and floating. But I will be driving 13 and 18 speeds soon(which I am stoked about!) and have a few basic questions. I do know that there is no point in splitting gears if you dont need to, but we will be heavy quite a bit.
    1. Taking the lever out of the hole just to split gear?: Eaton Fuller videos advise this but I dont know if they are simply covering their butts or if it does indeed protect the splitter parts in the trans. I understand the concept on all trannies that clutching gives trans an extra measure of protection, but that floating does no harm IF IT IS DONE CORRECTLY. A driver who DCs well is gonna be a good floater too.
    2. If you leave it in hole to split, as most of you probably do, does clutching it help? Does clutching it protect the splitter assembly in the trans?
    3. Pre-selecting splitter: If I am making a shift from 7H to 8L, should I pre select the splitter? Most guys on youtube are, but again the EF vid shows this: The guy takes it out of 7th hole and into 8th, and then he moves splitter to rear, and then he reapplies torque. I assume that whatever you do you dont want to be moving the splitter while you go through neutral?
    thank you!
     
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  3. Viper09

    Viper09 Light Load Member

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    Sep 8, 2014
    Council Bluffs, IA
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    For what it's worth, I've been driving 13 and 18 speeds since I've been driving. Here's my recommendations:
    1: No need to do that. Move the splitter and let off the throttle to up shift. RPM's will come down and it catches the next gear. Just don't step back on the throttle to quickly or you'll wind it to the moon. Trust me on this one. For downshifting, move the splitter and blip the throttle. Same thing, it'll catch the gear.
    2: Personal preference on this one. I don't clutch these and have never managed to rip out my tranny. I have a friend who clutches all those shifts and he's been driving as long as me. Six and one galf dozen or the other.
    3: ALWAYS PRESELECT ALL RANGE AND SPLITTER SHIFTS! Always. No, you don't want to be flailing around with the splitters in neutral when in motion. Bad stuff will happen eventually.
    Hope this helps. Good luck.
     
    Last edited: Jan 17, 2015
  4. TNMT

    TNMT Light Load Member

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    The way I was taught and still do you take it out of the hole and then move the splitter and then put it back into the next gear.
     
  5. x#1

    x#1 Road Train Member

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    Cherokee County, Alabama
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    basically,an 18 speed or a 13 speed for that matter,is nothing but a 10 speed with more gears.start in the low range,then at what,6th gear,start splitting. no need to get discombobulated over nothing. no need to trip as an 18 speed is just another transmission.

    look on the bright side.your company would not put you in it if they think you could not handle it plus it is not an automatic. just drive it and acclimate yoursel to it.no big deal.you are acting like a true newb. do not do that in front of your new employer.
     
  6. Allow Me.

    Allow Me. Trucker Forum STAFF Staff Member

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    I always pre-select. Think about it, if you take it out of the hole and then move the splitter, and THEN have to get it back into the hole, you're doing way more than needed. Also, you can shift WITHOUT moving the splitter. if necessary, like 7th direct to 8th direct.
     
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  7. scottied67

    scottied67 Road Train Member

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    I wouldn't recommend doing that. First it is a huge waste of time and energy on the driver's part-- the whole idea is to take the truck from a two stick situation and make it into a one stick with Easy push buttons. Second may be causing wear where it wouldn't get wear doing it the right way. Third going down hill and downshifting, BAD idea to take it out of gear to split down- what if you couldn't get it back in?

    OP-- time to split up?-- like 1400 RPM or so, just split up and let off the throttle one time.

    downshifting-- get the RPMs down say 1200 or so (have to experiment) then pull the splittler back and throttle up one time. Keep the big stick in the hole upsplitting and downsplitting. Controlled by throttle. I had my 9 speed upgraded to 13 speed 3.5 years ago, no problems doing it this way and I was basically self taught. If I were to hire someone to drive my truck, they would do it my way or I would not hire them.
     
  8. scottied67

    scottied67 Road Train Member

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    1-- where is the info from Eaton Fuller recommending pulling stick out of the hole for splitting? I have seen a guy doing that on youtube just figured he was told to do that by some old dumb bass fisherman.

    2-- no need to clutch, just move the splitter at the right RPM range that you like then bump or let off the throttle it will automatically go into the proper split gear.

    3-- yes pre-select from 7H to 8L just be very very careful not to let off throttle from 7H to 7L before your shift to 8L. Let's say you're at 1400 RPMs 7H and slide it back to 7L and let off throttle all kinds of nasty noises will come up from the floor. Have to be very careful with those mistakes and learn how to recover from it. Probably the quickest best way is to throw the stick in neutral. This is why it is important to perfect your splitting on flat ground before you hit the hills.
     
  9. Raezzor

    Raezzor Quis custodiet ipsos custodes?

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    I've never seen a video where they shift into neutral just to split. Or even clutched. Everything I've seen or been taught was basically you split like you float a full gear, all throttle control. Pre-selecting is important of course like others have said. Maybe if you don't then you need to be in neutral in order to get into the next gear. But if you pre-select all splits/range changes then I don't see the problem. *shrug*
     
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  10. rank

    rank Road Train Member

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    I too haven't seen the video where Eaton recommends that. The website told me to split then immediately single clutch IIRC.
     
  11. Scott101

    Scott101 Medium Load Member

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    Here is a video from Eaton showing to single clutch the splits:

     
    Last edited by a moderator: May 9, 2015
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