converting 9 speed in to 13 speed?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by coadman, Feb 25, 2009.

  1. coadman

    coadman Light Load Member

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    Is it reasonably easy to convert a 9 speed transmission into a 13 speed? This is in another Pete truck I am looking at.
    thanks,
    Jim
     
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  3. JSmitty

    JSmitty Light Load Member

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    Yeah, for several thousand dollars, it can be done.
     
  4. 07-379Pete

    07-379Pete Crusty Commando-Pete

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    The last one I had changed over was just over $1900.00 out the door.
     
  5. cat from the valley

    cat from the valley Medium Load Member

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    it aint hard just need the back of the tranny wit overs that correspond wit your 9speed
     
  6. Working Class Patriot

    Working Class Patriot Road Train Member

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    One thing to consider before converting a 9 to a 13....
    What are the loads demands your rig will be tugging?
    A 13 manufactured as a 13 was designed for different conditions than a 9.
    A converted 9-13 is in reality a "Little 13".
    You also may want to factor in your engine Horsepower and torque; and you might also consider your rear-end ratio as well to see if it will make sense to covert.
    There is no need to go to a 13 if you work local or if you run east of the Rockies.
     
    The Challenger Thanks this.
  7. ampm wayne

    ampm wayne Heavy Load Member

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    I looked at a new Pete last fall with a 9 speed. Dealer said 13 spd.conversion was an easy change for $2,000.00.
     
  8. coadman

    coadman Light Load Member

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    Probably no need for a 13 speed, as my hauling should be local. I am in Kansas, and I have to drive a far piece before I could find any hills!(lol)
    thanks for the responses, just picking you guys' brains, a bit.
    Jim
     
  9. droy

    droy Heavy Load Member

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    Respectfully disagreeing, good friend from my grain hauling days has a "converted 13" between a 500 Detroit and some 3.70 rears. With our 100,000 pound permits, and hauling fertilizer, and grain into, and out of the field, I would say it is just as durable as the next 13.

    For higher resale values, Werner ordered, and have now since traded a fleet of 2004, and 2005 W900s that have what is called a "convertible" 9 speed; the back box is on it, but not the splitters, making it an easy change. A used truck dealer friend of mine who had purchased some of these trades was having them turned into 13s for $500/truck.

    The 2004 W900 (non-Werner) I purchased from Fort Worth KW had one of these, and service manager there told me many companies are ordering these trannys. 9 speed for the driving school fellas, when traded, easy conversion to a 13 = higher resale.

    Looking at the tranny tag, it will have a "c" in the model no. to show it is a convertible. Mine also has the suffix "AT2" which I was told stood for "Automatic in the top two gears".
     
  10. Working Class Patriot

    Working Class Patriot Road Train Member

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    RocketyMan Thanks this.
  11. droy

    droy Heavy Load Member

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    Ron, will have to respectfully disagree back back, and profess my ignorance, as I am not seeing what you apparently are.
    Looking at what you posted, I don't see that a 9 turned into a 13 is weaker, especially when really, all you are doing is adding a splitter section on the back of the tranny.
    If you have a convertible 9, rated at 1600, and a "regular" 9, rated at 1600, and a 13, rated at 1600, what is the difference?
    I honestly do know what kind of 9 my buddy had, but it was converted by a mutual friend of ours that has a tranny, and diff. rebuild shop, and the truck owner is one that will put equipment to the test, believe me.
     
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