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  1. #1
    Join Date
    Feb. 12, 2004
    Location
    aiken, sc
    Posts
    50

    Default axle ratio on truck

    I have hauled a gooseneck with a 1500 silverado with 3.73 axle ratio without any trouble for years. I am thinking of a new one with all the safety stuff. the 3.73 hasn't come out yet and will be rated for 12,600 lbs. I would never pull more than 6000 and usually 4500. the current trucks have 3.42 ratio and is rated for 9600 lbs but 40 more horsepower than I have now. I know it may be slower to accelerate but I think it will work as I'm not hauling as much as I used to. any thoughts?



  2. #2
    Join Date
    Jan. 26, 2006
    Location
    Fort Worth, Texas
    Posts
    4,355

    Default

    need a little more info... tire size and transmission type.. to see if the 3.42 would act any differently than your older 3.73

    What you looking for is the "finial gear ratio"

    there are all sorts of on-line calculators

    http://www.summitracing.com/expertad...tio-calculator



  3. #3
    Join Date
    Feb. 12, 2004
    Location
    aiken, sc
    Posts
    50

    Default

    Quote Originally Posted by clanter View Post
    need a little more info... tire size and transmission type.. to see if the 3.42 would act any differently than your older 3.73

    What you looking for is the "finial gear ratio"

    there are all sorts of on-line calculators

    http://www.summitracing.com/expertad...tio-calculator
    V8 5.3 6 speed automatic flex fuel; tires are P265R18 off road suspension and extra transmission cooling 345 horsepower



  4. #4
    Join Date
    Nov. 6, 2002
    Location
    Henrico, NC 36 30'50.49" N 77 50'17.47" W
    Posts
    5,807

    Default

    copied and pasted: it has two overdrives like I thought it would.



    Transmissions

    Hydra-Matic 6L80
    Type: six-speed automatic
    Gear ratios (:1):
    First: 4.03
    Second: 2.36
    Third: 1.53
    Fourth: 1.15
    Fifth: 0.85
    Sixth: 0.67
    Reverse: 3.06
    Final drive ratio
    (std. & avail.):
    3.08, 3.23 or 3.42; 3.73 with Max Trailering Package



  5. #5
    Join Date
    Aug. 15, 2012
    Posts
    15

    Default

    I have an 2011 5.3 with 3.42 axle pulling 2 horse bumperpull probably 4500 lbs. The 6 speed is great and makes all the difference in the world. If you go with a gooseneck you can run out of payload on the truck quickly. The truck will pull it easily just maybe not legally.



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