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Where to replace rear end ratio?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Swadian, Dec 11, 2018.

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  1. Dec 11, 2018 #1
    Swadian

    Swadian Light Load Member

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    Jan 21, 2017
    Reno, NV, USA
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    I was advised by a mechanic to replace the 3.21 rear end on my bus with a 2.64 because I have a direct drive, but I don't know where to get it done. Do any of you know a shop in Nevada or Arizona where I can do it?
     
    Swadian, Dec 11, 2018
    Swadian, Dec 11, 2018
    #1
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  3. Dec 11, 2018 #2
    I glide 47

    I glide 47 Road Train Member

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    Any truck shop or dealer
     
    I glide 47, Dec 11, 2018
    I glide 47, Dec 11, 2018
    #2
    Oxbow Thanks this.
  4. Dec 11, 2018 #3
    I glide 47

    I glide 47 Road Train Member

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    If they do drive lines should be just a diff swap out, about 4 hours labour . I recommend Weller remains.
     
    I glide 47, Dec 11, 2018
    I glide 47, Dec 11, 2018
    #3
    Swadian Thanks this.
  5. Dec 11, 2018 #4
    Bakerman

    Bakerman Road Train Member

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    Phoenix, AZ
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    Betts Truck parts
    7375 W Buckeye Rd, Phoenix, AZ 85043
    623-907-9396
    WW Williams
    2602 S 19th Ave, Phoenix, AZ 85009
    602-257-0561
     
    Bakerman, Dec 11, 2018
    Bakerman, Dec 11, 2018
    #4
    Oxbow, Swadian and I glide 47 Thank this.
  7. Dec 12, 2018 #5
    MM71

    MM71 Heavy Load Member

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    Jun 28, 2008
    AZ
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    That big of a jump will drop you 330 ish rpm per gear. Do not know what that bus has in it for a motor, what size tires it has, what transmission. But ... Its going to be a fair bit slower on acceleration and probably a dog in the hills. Unless you are running crazy RPM at speed, I would leave it be.

    As stated any place can do it. Do you have a single drive axle? A single 3rd member swap for a re manufactured unit with a warranty will be 1800 ish dollars plus labor and fluid. A bit cheaper if your unit is removed, taken to a gear place and rebuilt.
     
    MM71, Dec 12, 2018
    MM71, Dec 12, 2018
    #5
    Swadian Thanks this.
  8. Dec 15, 2018 #6
    Swadian

    Swadian Light Load Member

    184
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    Jan 21, 2017
    Reno, NV, USA
    0
    Anyone have BSFC chart for the Series 60 11.L? The engine 6067WK28. Cruising at 70 mph with 315/80R22.5 and direct drive transmission. Currently 1800 RPM at 70 mph on the flat; the change should make it 1500 RPM.

    Last time I went to WW Williams I was under impression they couldn't do it. How much would it cost?
     
    Swadian, Dec 15, 2018
    Swadian, Dec 15, 2018
    #6
  9. Dec 21, 2018 #7
    Swadian

    Swadian Light Load Member

    184
    51
    Jan 21, 2017
    Reno, NV, USA
    0
    OK, WW Williams can do it, but won't give me a quote until we drive it there. How much does it usually cost per axle? Would like to know a ballpark in case they try to overcharge.
     
    Swadian, Dec 21, 2018
    Swadian, Dec 21, 2018
    #7
  10. Dec 21, 2018 #8
    Socal Xpress

    Socal Xpress Road Train Member

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    I would imagine it cost 2500 to 3500. I blew a rear end in PA and it set me back 3k
     
    Socal Xpress, Dec 21, 2018
    Socal Xpress, Dec 21, 2018
    #8
    Swadian Thanks this.
  11. Dec 21, 2018 #9
    Swadian

    Swadian Light Load Member

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    Jan 21, 2017
    Reno, NV, USA
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    Sounds good. I heard people quoting me $5000-8000 and I knew that was too high.

    How much fuel can one expect to save by going to higher rear end and dropping RPM by 300? BSFC shows optimal RPM for 6067WK28 at 1500; currently it would be 1800 at our cruising speeds.
     
    Swadian, Dec 21, 2018
    Swadian, Dec 21, 2018
    #9
  12. Dec 21, 2018 #10
    MM71

    MM71 Heavy Load Member

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    Jun 28, 2008
    AZ
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    max 5 hours of labor each 3rd member for removal and replacement. Max 2100 for 3rd member with interaxle, 1800 for rear.

    I just had both replaced in a semi truck DS404's which are on the higher end of price. Front one grenaded so had to have the hubs removed. Paid for new yokes, and reman thru shaft. 6300 in portland with 110hr labor rate

    Does your bus have two live drive axles? usually there is only one drive and a dead axle for weight capacity.
     
    MM71, Dec 21, 2018
    MM71, Dec 21, 2018
    #10
    Socal Xpress Thanks this.
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