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Shifting a 15 speed?

Discussion in 'Questions From New Drivers' started by risingfighter, Sep 25, 2007.

Page 1 of 4
  1. Sep 25, 2007 #1
    risingfighter

    risingfighter Bobtail Member

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    Sep 25, 2007
    albuquerque, nm
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    I was wondering if anybody had a shift sequence for a 15 speed, because the pattern was worn off of the truck I had to pick up today.
     
    risingfighter, Sep 25, 2007
    risingfighter, Sep 25, 2007
    #1
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  3. Sep 25, 2007 #2
    broncrider

    broncrider Road Train Member

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    somewhere drinkin beer probaly.....
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    get with brickman...he has recent experiance with a reversed 15...so it should be very easy to explain
     
    broncrider, Sep 25, 2007
    broncrider, Sep 25, 2007
    #2
  4. Sep 25, 2007 #3
    Brickman

    Brickman Trucker Forum STAFF Staff Member

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    What year??????


    Some time in the late 80s they changed it so if its later than that it should shift like a 10 spd. Most of the time you can ignore the bottom 5 as that is deep reduction used mainly for off road or where you need really slow gearing.


    If its an old trans pattern it'll be like this...........


    R 2 5
    1 3 4
     
    Brickman, Sep 25, 2007
    Brickman, Sep 25, 2007
    #3
  5. Sep 25, 2007 #4
    risingfighter

    risingfighter Bobtail Member

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    Sep 25, 2007
    albuquerque, nm
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    Thanks alot i'm not sure what year it is, i'll find out tomarrow when I drive it. Really apprciate it guys.
     
    risingfighter, Sep 25, 2007
    risingfighter, Sep 25, 2007
    #4
  7. Sep 25, 2007 #5
    Brickman

    Brickman Trucker Forum STAFF Staff Member

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    If it doesn't want to shift with the reverse 4 and 5 try shifting it like a regular ten spd and see if that works.
     
    Brickman, Sep 25, 2007
    Brickman, Sep 25, 2007
    #5
  8. Sep 25, 2007 #6
    Powder Joints

    Powder Joints Subjective Prognosticator

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    Sep 25, 2007
    Rosamond, SoCal
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    Range select front lever down low up is high

    R 2 4
    1 3 5


    Upper Gears split with side lever

    R 8/9 12/13
    6/7 10/11 14/15
     
    Powder Joints, Sep 25, 2007
    Powder Joints, Sep 25, 2007
    #6
  9. Sep 26, 2007 #7
    Brickman

    Brickman Trucker Forum STAFF Staff Member

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    Thats unlike any 15 i've driven.



    All the ones I've driven with the range lever in the down position the side bar will shift you from low range to deep reduction.
     
    Brickman, Sep 26, 2007
    Brickman, Sep 26, 2007
    #7
  10. Oct 20, 2007 #8
    uncle bill

    uncle bill Bobtail Member

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    I agree with Brickman. Any 15 i drove or saw was a 10 with deep reduction. Had to drive one today with the 4/5 reversed. BTW, I think the reversed pattern is called a RTX not a RTO. They are both overdrive trannies.
     
    uncle bill, Oct 20, 2007
    uncle bill, Oct 20, 2007
    #8
  11. Oct 20, 2007 #9
    PackRatTDI

    PackRatTDI Licensed to Ill

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    You have it backwards, RTX shift patterns are the same as RT. RTO patterns have the top gear position in the upper right corner.

    IIRC, Eaton never really gave the 15 speed an "RTX" name, but gave the buyer an option of either shift patter, both called RTO. I don't think the reverse pattern is available anymore, except maybe as a special order, the straight RT/RTX patters are far more popular.
     
    PackRatTDI, Oct 20, 2007
    PackRatTDI, Oct 20, 2007
    #9
  12. Oct 20, 2007 #10
    Young-Gun-101

    Young-Gun-101 Light Load Member

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    Feb 18, 2007
    Iowa
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    we still have a freightliner with a 15 in it and we shift ours just like powder joints explained
     
    Young-Gun-101, Oct 20, 2007
    Young-Gun-101, Oct 20, 2007
    #10
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