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  1. #1

    Default other rearend gears for 2500HD?

    Since I can't give my truck away, I may have to keep her.
    Are there any other rearend gears made for the 2500??
    I've got 4:10 do not that. I'd like to get down to 3:42ish or lower.
    Thanks, Mark

  2. #2

    Default

    Yes, there are other rear end gears. I like Randy's site layout (ringpinion.com) as far as finding what's available for you axle. You can also look at most any other vendor (like Napa, partsamerica.com, Carquest, GM dealer, or a local 4x4 shop or whatever).

    Know that if you have a 4x4, you also have to change the front axle gear ratio, or convert to 2wd.
    '98 K1500 Suburban LS 5.7 L 4L60E NV246 ARB
    '92 Ford Explorer XLT 4x4 4.0 L A4LD BW13-54 Trac-loc rear
    "My toys were the greasy cogs and springs and pistons that lay around all over the place, and these, I can promise you, were far more fun to play with than most of the plastic rubbish children are given nowadays." Danny in Roald Dahl's Danny The Champion of the World

  3. #3

    Default

    If you change gears, your speedometer will be wrong. For the GM 10-bolt rearend that is found on most 1/2ton trucks, they make gears as low as 3.08 and as high as...I think 5.56

    For the 14-bolt rearend that's probably in your truck, I think the lowest there is is 3.42s, but I think that's even a bit low for that rearend.
    Last edited by Crawdaddy; 08-01-2008 at 10:49 AM.
    Christopher

    1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4.10 gears 200K miles
    2005 Saturn ION-2 Stock 265K miles
    1982 Bronco, 1993 Bronco (sold), 1971 M35A2 Deuce and a Half



    There are 10 kinds of people, those who understand binary, and those who dont...

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  4. #4

    Default

    why do you want to lower your gears?? there are many other gears for your axle, my guess is a 14 or 12 bolt. i would keep them stock the 4.10 is a good all around gear ratio to stay with unless you get bigger tires
    PETE
    95 GMC Sierra 2500
    3" Body Lift, 33" Goodyear MTR's
    5.7L 350 TBI Edelbrock SDT Exhaust, Flowtech Headers, K&N Intake
    Sold :(
    1999 Jeep Cherokee, 3" Rustys lift, 33" BFG MT's, locked, armored: Rolled :(
    2000 Jeep Grand Cherokee Limited. K&N Intake, Custom Kolak Exhaust


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  5. #5

    Default

    Not sure of the year model truck you have, but it shouldnt matter much the axles didnt change a lot over the years. I have 3.42's in my 1997 2500 4X4 Suburban w/7.4, the gears made a big difference in the mpg, when I got it I was only getting around 12 with 4.10's now it gets avg 16 and I've gotten as good as 21 on a road trip.
    Randy's Ring and Pinion is probably one of the best gear vendors around. There are many others out on the market that can be found with a google search, but most prices will be comparable. Just remember to avoid any gears manufactured in China, they've been having reliability problems for a few years.

  6. #6

    Default

    i would have to ask why the gear swap as well? for the same cost you can get a gear vendor splitter or doubler to keep the same gear and get another gear when you want it....mike
    Michael Collins
    1993 4X4 Suburban
    many other toys as well

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