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Thread: Regear

  1. #1

    Default Regear

    I need opinions. I want to regear my truck, it has a 4.3l v6 and I'm looking into putting some 32" tall tires. And I was thinking of 3.73 gears. What's your opinion? But most importantly I want to know how it'll affect my gas mileage. I do mostly city driving

  2. #2
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    Default

    This chart (see link below) should help you make a decision. Gas mileage is certainly a point to think about but you may also want to consider some other items as well, for example:
    *Transmission wear and additional heat (if any, given your parameters)
    *Torque [power] for towing, passing, hills, etc.
    *Cost benefit...is it worth it? -not sure if you have a 2wd or 4wd, but it can be quite pricey especially if you have a 4wd
    *Do you think you may go with a larger tire than the 32" once these wear out

    IMO, you should establish and your goal or purpose for re-gearing (if you have not already) and work backwards from there.

    http://www.4x4offroads.com/gear-ratio-chart.html


    Mike (Denver, CO) - 2008 Sierra 1500 Z71 SLE 5.3L 4WD

    SUSPENSION: Rancho 4" Suspension Lift; Rancho RS9000XL Shocks; Rancho Skid Plates; Rancho MyRide Wireless Shock Controller;
    TIRES:
    BFG All Terrain KO 315/70/17
    DRIVE TRAIN: 4.56 Gears; Detroit TrueTrac Differential; True Cool 40k Transmission Cooler
    PERFORMANCE: DiableSport Predator Tuner; Custom Tuned by Diablew; Magnaflow Exhaust; AFE Cold Air Intake
    ELECTRONICS: Kenwood DNX6180 Touchscreen; Subthump box w/10" Kicker; Driver Information Center (DIC); Rear View Camera
    ACCESSORIES: Westin Brush/Grill Gaurd; Westin Nerf Bars; Truxedo Tonneau; 20% Tint; Tow Mirrors w/Heat & Signals

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