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Cat 3406 B RPMS / shifting

Discussion in 'Experienced Truckers' Advice' started by turboguy, Jul 16, 2016.

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  1. Jul 16, 2016 #1
    turboguy

    turboguy Light Load Member

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    I have a new to me rig that has a CAT 3406 B with a 13 speed but was going drive it as a 9 speed for a bit.


    What RPM should I be shifting at ?
     
    turboguy, Jul 16, 2016
    turboguy, Jul 16, 2016
    #1
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  3. Jul 16, 2016 #2
    Milr72

    Milr72 Medium Load Member

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    Why?
     
    Milr72, Jul 16, 2016
    Milr72, Jul 16, 2016
    #2
    rank, Bean Jr., okiedokie and 1 other person Thank this.
  4. Jul 16, 2016 #3
    swaan

    swaan Road Train Member

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    So your gonna straight shift your 13 speed and not use the splitter.
    I won't ask why cuz I'm scared to know the answer.

    You won't have a choice really , your going to have to rev it up fairly high to straight shift it . In the upper gears probley like 1800-1900 rpm to make the next gear .

    Here's an idea, just drive it like it was designed to with that trans.
     
    swaan, Jul 16, 2016
    swaan, Jul 16, 2016
    #3
    rank, Lepton1, wore out and 1 other person Thank this.
  5. Jul 16, 2016 #4
    Dumdriver

    Dumdriver Road Train Member

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    I just don't understand…
     
    Dumdriver, Jul 16, 2016
    Dumdriver, Jul 16, 2016
    #4
  7. Jul 16, 2016 #5
    magoo68

    magoo68 Road Train Member

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    Maybe truck has splitter issue
     
    magoo68, Jul 16, 2016
    magoo68, Jul 16, 2016
    #5
  8. Jul 16, 2016 #6
    turboguy

    turboguy Light Load Member

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    thanks guys the reason is the splitter is having issues,

    once I get the splitter fixed what RPM should I shift at?
     
    turboguy, Jul 16, 2016
    turboguy, Jul 16, 2016
    #6
  9. Jul 16, 2016 #7
    Bakerman

    Bakerman Road Train Member

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    13-1500 rpm

    No problem straight shifting when you just bobtail, but if you are loaded, it will be a bit more difficult.
     
    Bakerman, Jul 16, 2016
    Bakerman, Jul 16, 2016
    #7
    PaulMinternational, Lepton1 and turboguy Thank this.
  10. Jul 16, 2016 #8
    turboguy

    turboguy Light Load Member

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    thanks Bakerman

    1. What should I take her down to for downshifting full gears?

    2. I haven't used a 13 speed yet, as I understand it for upshifting half gears move the splitter in the high position and let of the throttle and then get back on the throttle and she will shift into the high position.

    What is the process to downshift a half gear?
     
    turboguy, Jul 16, 2016
    turboguy, Jul 16, 2016
    #8
  11. Jul 16, 2016 #9
    Bakerman

    Bakerman Road Train Member

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    Pull splitter into low position, let off the throttle and then burp the throttle. I do this with the Jake on for quicker response.
     
    Bakerman, Jul 16, 2016
    Bakerman, Jul 16, 2016
    #9
    Lepton1 and turboguy Thank this.
  12. Jul 16, 2016 #10
    AModelCat

    AModelCat Road Train Member

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    Bobtail/empty I never split up or down. Downshifting I'm lazy and usually just do full gears.
     
    AModelCat, Jul 16, 2016
    AModelCat, Jul 16, 2016
    #10
    ODR, ramblingman and turboguy Thank this.
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