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2010 Silverdo Rear end ratio change???

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by alkaspeltzar, Aug 7, 2011.

  1. alkaspeltzar

    alkaspeltzar New Member

    Hey guys,I got a 2010 silverado with 6-speed, 5.3 and 3.08 gears

    I pull a 5,000 boat, and cattle trailer pushing 6000lbs. I was told this would not be a problem when buying the truck, but I can tell I need alittle more power when traveling with it. Is it posslbe to replace the 3.08 gears with 3.42 or 3.73? Can the physical gears just be replaced, or does the entire rear axle have to go. Never done this to any of my previous rides, but for what I doing now, I need more pull.

    Also, since the rear end would turn at a different speed, does anything have to be changed in the front diff to keep the wheels turning equal?

    Any advice or help would be great. THanks guys
  2. stephan

    stephan New Member 1000 Posts

    Yes you can do just the ring & pinion, BUT you should change the ring & pinion in the front diff too so they rotate at the same speed when in 4WD, otherwise you're going to have some major issues :) How much does your cattle trailer weigh when loaded up?
  3. Blackout07

    Blackout07 New Member

    3.73's front and rear. I believe that's what comes in the 6.2's with the Max Trailering PKG.
  4. billnorman

    billnorman Member

    I learn something new every day. All 4x4's I've seen are at or near 4:10 ratios. I don't doubt you but that seems awfully high for a 4x4, but maybe that's what the 6 spped tranny is for. You don't have oversized tires on it by any chance do you? A cheaper way to bypass the gear issue might be going to a low profile tire, say a 50 series, for towing. That way you won't have to mess with the front axle either. Just a thought.

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