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9 Speed Transmission

Discussion in 'Trucks [ Eighteen Wheelers ]' started by linden, Mar 23, 2007.

  1. Mar 23, 2007 #1
    linden

    linden Bobtail Member

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    Dec 9, 2006
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    I was under the impression that the 9 Speed Transmission was relatively
    obsolete. Boy was I wrong. Following are some examples of 822 ads I
    found for later Model trucks.

    NEW 2007 PETERBILT 387 Stk #P691640 Call CA
    (Qty: 5) C-15 ACERT Caterpillar 435 HP, 9 Spd, Engine Brake, Pete Flex Air Suspension, 3.36 Ratio, 235" WB, 70" Sleeper, 22.5 Tires, All Aluminum Wheels, Tandem Axle
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    Updated: Feb 27 2007 10:45AM

    NEW 2007 MACK CXP613 Call PA
    Mack 395 HP, 9 Spd OD, Engine Brake, Air Ride Suspension, 215" WB, 70" Mid Roof Sleeper, 22.5LP Tires, Aluminum/Steel Wheels, Tandem Axle, 12,000# FA, 40,000# RA, 2007 PINNACLE CXP613 DARK BLUE ...
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    Updated: Feb 9 2007 3:13PM

    NEW 2007 KENWORTH T2120 Stk #132320 Call TX
    C15 Acert Caterpillar 475 HP, 9 Spd OD, Engine Brake, AG 380 Suspension, 336 Ratio, 232" WB, 75" Aerocab Aerodyne Sleeper, 22.5LP Tires, Aluminum Outside Wheels, Tandem Axle, 12,000# FA, 38,000# ...
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    Updated: Feb 26 2007 12:33PM

    2004 PETERBILT 379EXHD Call NC
    (Qty: 25) C15 Caterpillar 475 HP, 9 Spd, Engine Brake, Pete Low Air Leaf Suspension, 3.55 Ratio, 70" Ultracab Unibilt, All Aluminum Wheels, Tilt/Tele, Transmission Convertible to 13 Speed, ...
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    Updated: Feb 8 2007 2:12PM
     
    linden, Mar 23, 2007
    linden, Mar 23, 2007
    #1
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  3. Mar 23, 2007 #2
    PackRatTDI

    PackRatTDI Licensed to Ill

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    I bet all are those Eaton convertible transmissions.
     
    PackRatTDI, Mar 23, 2007
    PackRatTDI, Mar 23, 2007
    #2
  4. Mar 23, 2007 #3
    Burky

    Burky Road Train Member

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    Southwestern Michigan (Lawrence)
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    Note: I never said they were obsolete, but I did say that theye had somewhat fallen out of favor with the buying public. I was driving around last nite in one of our old yard dogs with a 9 speed, and it moved the trailer just as well as my 10 speed did. However, my 2006 was clearly (and cleanly!!!) a much nice truck than the 93 day cab I was using.
     
    Burky, Mar 23, 2007
    Burky, Mar 23, 2007
    #3
  5. Mar 23, 2007 #4
    25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

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    I have driven 9, 10, and 13 speeds,actually also 8LLwhich looks much like a ten with another button, the most miles are on 9 speeds, and I prefer the 13 to either of the other two but I would take a 9 any day over a 10, main reason is the shift pattern is almost the same as a 13 with the exception of the splitter. The 9 speeds I drove had better coverage of the upper gears than the 10 I drive now, I have high gear after I reach 60 and sometimes I have to run a gear down because of wind. I'm either running high RPM in 9th to run more slowly or running low rpm in tenth and lugging the engine. The engine gets hot if you are running full torque at low rpm for long periods of time. I did drive a C-ratio 10 speed and that did run up to 65 in 9th, it was tolerable.

    My company was looking into buying some Petes and there is not a 10 speed trans option available for those particular trucks but they are available with a 9 speed. There are many used 10 speeds available, and it's much easier to sell a used truck with a 13 or 18 speed; I have been looking at lots of used trucks.

    AJ
     
    25(2)+2, Mar 23, 2007
    25(2)+2, Mar 23, 2007
    #4
  7. Mar 23, 2007 #5
    linden

    linden Bobtail Member

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    Dec 9, 2006
    0
    Hey Guys:
    Thanks for your input.
    There was no criticism of anything I was told about 9 speed transmissions.
    I was just kinda of amazed at the amount of them that I found available as I began to look into them. There are sure a lot of them advertised.
    It looks as if a lot of them were spec'd by companies in 2004 and after.
    Thanks again for the information. I'm learning a little more each day.
     
    linden, Mar 23, 2007
    linden, Mar 23, 2007
    #5
  8. Mar 24, 2007 #6
    wallbanger

    wallbanger "Enemy of showers everywhere"

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    Like packrat said, most are probably convertible to 13's, making them more appealing (to most drivers).
     
    wallbanger, Mar 24, 2007
    wallbanger, Mar 24, 2007
    #6
  9. Apr 10, 2007 #7
    SFB

    SFB Bobtail Member

    34
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    Mar 6, 2007
    Wylie,Texas
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    so whats required to convert a 9spd to a 13spd?
     
    SFB, Apr 10, 2007
    SFB, Apr 10, 2007
    #7
  10. Apr 10, 2007 #8
    PackRatTDI

    PackRatTDI Licensed to Ill

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    El Chuco, Tejas
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    With the Eaton RTOC convertible transmissions, you install the necessary splitter gear air lines and 13 speed shift knob. The splitter gearset is present, it's just disabled when it's a 9 speed.

    On a regular 9 speed, the splitter gear has to be installed on the end of the transmission, which is more labor intensive.
     
    PackRatTDI, Apr 10, 2007
    PackRatTDI, Apr 10, 2007
    #8
  11. Aug 28, 2012 #9
    amarth2008

    amarth2008 Bobtail Member

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    Aug 3, 2012
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    Thats all swift runs in 9 speeds and less they are an owner op
     
    amarth2008, Aug 28, 2012
    amarth2008, Aug 28, 2012
    #9
  12. Aug 28, 2012 #10
    Ezrider_48501

    Ezrider_48501 Road Train Member

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    9 speeds and 13's are the same trans the 9 convertibles already have the splitter box so basically all you need is the knob and airlines the non convertible from what im told you can add the splitter box and have it converted for around 2k
     
    Ezrider_48501, Aug 28, 2012
    Ezrider_48501, Aug 28, 2012
    #10
    amarth2008 Thanks this.
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