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Commercial Truck Bone Yards

Discussion in 'Trucks [ Eighteen Wheelers ]' started by TheLittleGuy, Sep 2, 2011.

  1. Sep 2, 2011 #1
    TheLittleGuy

    TheLittleGuy Medium Load Member

    389
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    Apr 13, 2008
    Nashville, TN
    0
    So, I'm wondering if anyone knows of high quality used commercial truck bone yards (junk yards). I'm looking to change my rear diff gears and thought it might be cheaper and easier to just replace the entire axles.
    I currently have RT40-145P axles with 3.58 gearing. I'm looking to get a better highway gear that drops the engine RPMs. I'm prolly looking at 3.21s to 3.01s
     
    TheLittleGuy, Sep 2, 2011
    TheLittleGuy, Sep 2, 2011
    #1
    aggie1978 Thanks this.
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  3. Sep 2, 2011 #2
    bender

    bender Road Train Member

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    Jul 20, 2010
    Don't Kid Yourself
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    I doubt you will find that type of gearing in bone yards unless they install them for you. It will take a lot of engine to pull those gears and by your other post speaking of your cummins, well they need rpms to make power and don't like to be lugged down. Have you considered the cost of all of these changes and the little potential benefit?
     
    bender, Sep 2, 2011
    bender, Sep 2, 2011
    #2
  4. Sep 2, 2011 #3
    trlrtrash13

    trlrtrash13 Bobtail Member

    22
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    Dec 14, 2010
    Indianapolis, IN
    0
    Watseka Illinois. Corner of US 24 and Il 1. Can't remember what it's called, but should be in yellow pages.
     
    trlrtrash13, Sep 2, 2011
    trlrtrash13, Sep 2, 2011
    #3
  5. Sep 2, 2011 #4
    aggie1978

    aggie1978 Light Load Member

    165
    85
    Mar 16, 2008
    Jackson, MI
    0

    DONT do it. My boss thought it would be a great idea
    to put in a 2.92 gear in my 08 Kw t660 and yes it does drop the RPM down to about 1190 in 10th at 65. but I MPG went down because im always in 9th gear because it cant pull any type of incline

    I urge you to reconsider changing your gear

    As I hate it
     
    aggie1978, Sep 2, 2011
    aggie1978, Sep 2, 2011
    #4
  7. Sep 2, 2011 #5
    BigJohn54

    BigJohn54 Gone, but NEVER forgotten

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    1,599
    May 13, 2011
    SW Missouri
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    Tune your engine instead. Those gears will be trouble. I don't know with out figuring it but I can't imagine higher than 3.30. You will get a lot more bang for your buck by looking at the engine.
     
    BigJohn54, Sep 2, 2011
    BigJohn54, Sep 2, 2011
    #5
    aggie1978 Thanks this.
  8. Sep 2, 2011 #6
    112racing

    112racing Road Train Member

    1,384
    20,548
    Nov 30, 2008
    pocono's, pa
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    i'd get a double overdrive tranny first
     
    112racing, Sep 2, 2011
    112racing, Sep 2, 2011
    #6
  9. Sep 2, 2011 #7
    TheLittleGuy

    TheLittleGuy Medium Load Member

    389
    64
    Apr 13, 2008
    Nashville, TN
    0
    I'm looking to reduce my RPMs while cruising at 75mph. Currently, I churn 1700rpm at that speed.

    And yes, I know about the engine. It's currently set at 1450 ft/lbs of torque. I gotta do something about the tranny b4 I can get the engine turned up.
     
    TheLittleGuy, Sep 2, 2011
    TheLittleGuy, Sep 2, 2011
    #7
  10. Sep 3, 2011 #8
    blanco

    blanco Road Train Member

    1,221
    296
    Nov 20, 2009
    Gwinnett County, GA
    0
    call richard kerns in ellenwood, ga.

    if they dont have it, none will
     
    blanco, Sep 3, 2011
    blanco, Sep 3, 2011
    #8
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