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  1. #11
    Jr. Engineer hundojoe's Avatar
    Join Date
    Feb 2010
    Elk River, Minnesota


    There will only be about a 200-300 rpm difference between 33's and 4.10's and 4.56 and 35's. 2700 vs 2900rpm at 65 mph. If you go 4.56's with 33's your rpm's will be around 3100 at 65 mph, hope this helps.
    1999 Silverado Regular Cab Short Box
    Black on Black, Line-X sprayed in bed liner
    5.3 with K&N CAI, Texas Speed 220/220 cam with 112 deg LSA
    Texas Speed computer Tune
    American Racing Headers with Cats
    4.11 gears front and back, with Eaton rear posi
    Flowmaster 40series true duals
    16X8 American Racing Nitros with 305/70/16 Goodyear MTR's
    285's in the pic

    If it ain't broke...........Give me a minute!

    Im not completely useless, I can be used as a bad example...

  2. #12


    Yeah thanks man that helps a lot! I think what I'll do is get my 35's first then swap in the 4.56's. thanks for all help everyone!

    2006 Duramax LBZ
    Edge Evo
    4'' Diamond eye to 6'' tip
    16'' ion alloy, 33'' fierce attitudes
    Lots of work left to do!

  3. #13


    One of the benefits of a airlocker is you unlock it on the road for better mpg's.

  4. #14


    thats something I can always go for!

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