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  1. #1

    Default Changing the axle ratio in a 2011 Sierra

    Just wondering, has anyone done it ? I havent been happy with my 1500 since I tried to tow my car trailer with it and it felt like I was towing a house. It would be so much betterwith 3:73s in it. I considered trading it in for a 6.2 and max tow package but since Ive only owned it for a year I would take a huge loss. The dealer offered me 27K for it on a trade. Im thinking a new set of gears front and rear might be cheaper and it would probably help performance.

  2. #2


    you didnt say what gears you have

  3. #3


    Have you tried putting it on M5 or M4? I have a 5.3L and just put it on M5 when I am pulling. It also disables the AFM. Not sue what rear end i have though.
    2011 Chevy Silverado LT 4WD 25k miles
    2001 Suburban 2WD, 5.3, V8 176k miles
    1993 964
    1996 318TI

  4. #4


    Quote Originally Posted by silverbike9 View Post
    you didnt say what gears you have
    My truck has 3:42s in it. I think GM should make 3:73s and 4:10s an option for the 1500 series trucks.

  5. #5


    Idk why they went away from the 3.73 with the 5.3 that's what I have and I love it. Tows great
    2009 chevy 1500 z71 4x4
    2.5 ccm level,2.5 inch rear blocks 305/60/18 coopers stt,Debadged,10 series flow w/dual exit in front or right rear tire, KN CAI, diablo InTune, 18% tint all the way around ,spec-d euro headlights with black housings,winjet smoke LED tail lights,putco LED third brake light smoked, fab fours front bumper with 10k warn winch, RK sports ram air hood
    1965 c10 swb, zz4 350 with the hot cam and fast burn heads and a 780 Holley on top, richmond super street 5 speed,restorod

  6. #6


    Just fyi my2012 has the 3.73 's also

  7. #7


    my 2000 has the 3.43 and I wish it had the 3.73 or the 4.10 also. I guess the 3.43 is better for fuel econ, but not as good for towing.

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