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What rear end for D13 with ishift 12 speed

Discussion in 'Volvo Forum' started by rv4jesus, Feb 10, 2019.

  1. Feb 10, 2019 #1
    rv4jesus

    rv4jesus Bobtail Member

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    Driving lower 48 and Canada fully loaded with 45k load 60% of the time, 30k or less 30%, empty 10%. Chicago Denver SLC typical lane. What is your recommended rear axle ratio for best fuel economy and how many rpms will it be turning at 65 mph? I'm looking at a 2020 860. Thanks in advance for your help
     
    rv4jesus, Feb 10, 2019
    rv4jesus, Feb 10, 2019
    #1
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  3. Feb 10, 2019 #2
    rv4jesus

    rv4jesus Bobtail Member

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    The dealer spec is a 455 hp ecotorque with 3.08 rears.
     
    rv4jesus, Feb 10, 2019
    rv4jesus, Feb 10, 2019
    #2
  4. Feb 10, 2019 #3
    Bakerman

    Bakerman Road Train Member

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    Phoenix, AZ
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    Call the dealer, they will tell you what ratio works works best for your application.
     
    Bakerman, Feb 10, 2019
    Bakerman, Feb 10, 2019
    #3
  5. Feb 10, 2019 #4
    tnevin225

    tnevin225 Road Train Member

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    Whats an 860?
     
    tnevin225, Feb 10, 2019
    tnevin225, Feb 10, 2019
    #4
  7. Feb 10, 2019 #5
    Bakerman

    Bakerman Road Train Member

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    The new Volvo.
     
    Bakerman, Feb 10, 2019
    Bakerman, Feb 10, 2019
    #5
  8. Feb 10, 2019 #6
    tnevin225

    tnevin225 Road Train Member

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    Thank
     
    tnevin225, Feb 10, 2019
    tnevin225, Feb 10, 2019
    #6
  9. Feb 13, 2019 #7
    KB3MMX

    KB3MMX Road Train Member

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    Go with XE specs or Xceed.

    Typically rears are 2.47, 2.50, 2.64 and 2.85 in that package.

    Don't let the rear ratio scare you, the XE software pulls amazing and gets incredible mpg even at 80K.


    2.64 w/ 22.5LP is 1100 rpm@63mph, 1150@65, 1200@68
     
    Last edited: Feb 13, 2019
    KB3MMX, Feb 13, 2019
    KB3MMX, Feb 13, 2019
    #7
    rv4jesus Thanks this.
  10. Feb 13, 2019 #8
    KB3MMX

    KB3MMX Road Train Member

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    Orrstown, PA
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    Replacement for 780 ....

    The 760 is the new 670 made bigger, the sleeper size is halfway between the old 600 series and 700 series.
     
    Last edited: Feb 13, 2019
    KB3MMX, Feb 13, 2019
    KB3MMX, Feb 13, 2019
    #8
  11. Feb 17, 2019 #9
    rv4jesus

    rv4jesus Bobtail Member

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    The xceed package sounds good. Has anyone actually had any experience with it and what fuel economy are they getting?
     
    rv4jesus, Feb 17, 2019
    rv4jesus, Feb 17, 2019
    #9
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