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Rear-end ratio swap...

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Gambi80, Dec 1, 2012.

  1. Dec 1, 2012 #1
    Gambi80

    Gambi80 Medium Load Member

    367
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    Jan 31, 2010
    Fried Chicken Capital of the Midwest
    0
    Just out of curiousity, what's a ballpark figure on swapping ratios on Eaton rears...?? I'd like to go from 3:90 to 3:55. If I brought it to a shop with a mid-$80 labor rate, what would it cost (parts AND labor) and about how long would it take? Thanks...
     
    Gambi80, Dec 1, 2012
    Gambi80, Dec 1, 2012
    #1
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  3. Dec 1, 2012 #2
    CatPowerC15

    CatPowerC15 Medium Load Member

    347
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    Feb 18, 2010
    Siler City, NC
    0
    If your rears are low mile, I would swap new ring and pinions. You can get Eaton gear sets for around $300 each. Add the pinion bearings and 10 gals synthetic, you could do it yourself for less than $1000 bucks. Labor for a shop should run somewhere around 800-1000 more. Based on 10 hours....in which it can be done...easily.
     
    CatPowerC15, Dec 1, 2012
    CatPowerC15, Dec 1, 2012
    #2
  4. Dec 1, 2012 #3
    Gambi80

    Gambi80 Medium Load Member

    367
    92
    Jan 31, 2010
    Fried Chicken Capital of the Midwest
    0
    There is 685,000 miles on the truck...as far as I know, there aren't any issues with the rears mechanically. Just want to get my cruise rpm down. I'm not sure if I'm brave enough to tackle that myself...lol. Appreciate the input though.
     
    Gambi80, Dec 1, 2012
    Gambi80, Dec 1, 2012
    #3
  5. Dec 1, 2012 #4
    jbatmick

    jbatmick Road Train Member

    2,198
    2,506
    Dec 1, 2009
    hastings, Fl
    0
    I would wait until I had a problem with one of them before I replaced anything, unless I did it myself.At least until time to change lubricant. Shops around here will get you for around 9 / 10 hours to swap them both out.
     
    jbatmick, Dec 1, 2012
    jbatmick, Dec 1, 2012
    #4
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