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  1. #1

    Default 08 Silverado 2500 rear axle gear ratio

    I just lifted my 08 silverado 2500hd with a 6" kit with 35" tires. Stock rear axle gear ratio is 3.73 (I think!). Can someone recommend a good new ratio to accommodate the bigger tires? According to Superlift's website, a 4.56 or 4.88 gear is "optimum". Any feedback on this? Also, would I have to regear the front gear as well? Finally, which mfr's would you recommend looking at? Thanks!

  2. #2

    dwill3015's Avatar
    Join Date
    Jan 2007
    Yacolt, Washington
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    I would say the 4.56's for sure as i have researched this for my 87 blazer w/35's for when have the money to upgrade my gearing and go with a posi unit. You must change the front to match the rear because it will bind up if not.
    Washington State
    2006 Silverado 2500HD LT3 4X4 CC SB Duramax LBZ
    Tuff Country 6" lift, 35" Toyo M/T's on 20" Ultra Peacemaker wheels, Quadzilla Stealth2 programmer, Diamond Eye 5" cat-back exhaust, factory Special order color Yellow.

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