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  1. #1

    Default 10 Bolt rear end Locker problems

    I have a 2003 Suburban with the 5.3. anytime we take a right or left turn the rear end locks. i understand its supposed to lock when one of the wheels spin but when your going around a turn the inside wheel is supposed to free wheel. we still have the window sticker and its got the locker option on it for like $225 dollars more. we took the rear cover off and found that some of the spider gears are chewed up. does anyone know where i can start looking to get parts to rebuild the locker?

  2. #2
    Sr. Apprentice Toolman's Avatar
    Join Date
    Jul 2009
    Hawthorne / Wrightwood Ca.


    I happen to do some machine work for a rear-end shop around the corner from me and I've seen GM spider gears chewed up with less than 20K on them. Known problem with the little rear end. I don't think I'd waste the time rebuilding the stock diff. when a Detroit True-Trac is much superior. Depending on were you purchase one, they run around 450 bucks. You get a quality product that's actualy machined parts.

    I have them in my 2wd Silverado and in my 4wd Ramcharger and never put chains on in the winter.
    "You can't fix stupid"

  3. #3


    you can also go for the gm posi (prodution code g80) which will work out nicely

  4. #4


    Don't buy any parts until you take it apart, clean it up, and see what damage has been done. There will be more damage than you can see from the outside and it may be cheaper to but a new posi.

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows

    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

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