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  1. #1

    Default Transfer case hole

    I have an 07Crew 3500 duramax/allison with the push button 4X4. I noticed a little spot on the drive and now it has grown bigger and bigger. I thought it was a seal or pan gasket on the transmission but after taking a closer look I noticed a hole about the size of a pencil lead worn thru the transfer case. The truck has 363000 on it but was wondering if anyone else has had this problem. I noticed on ebay that there is an aftermarket rear half for the t-case but not sure how bad the rest of the internals are. The past two half ton silverados i have owned had blue t-case fluid. Is the dually supposed to also? A new GM t-case is around 1700, but i want to be sure that is the only problem i have. Any input would be helpful.

  2. #2


    Go to Transfer case express and buy the rear half. Its the updated one that does not require the pump upgrade to take out the slack. I just got done replacing my rear casing on my 04 2500 4x4. The GM house wanted $300+ for a new rear casing plus you would still have to buy the update for the pump. I really feel sorry for the guys that are not mechanical inclined. I spent about $220 compared to 600+ for the gm to remove the casing +300+ for the casing + another 75+ for the up grade for the pump.

  3. #3


    Exactly what he said!

    2009 Chevrolet Silverado 1500 LT Z71 Crew Cab "All-Star Edition"

    Line-X'd Bed
    Line-X'd Custom Brush Guard(Heavy Duty)
    5.3L Flex Fuel
    Factory Black Running Boards
    BF Goodrich All-Terrain KO's(265/65R18)
    2" Rough Country Leveling Kit
    EGR In-Channel Vent Visors
    Exterior PLUS Package
    Interior PLUS Package
    K&N Drop-In Air Filter
    Bowtie Mud Flaps
    Cat-Back Dual Exhaust
    Black Bowties
    DeeZee Toolbox(Debadged)
    Diablo Sport Predator(AFM Disabled)
    Towing Mirrors
    Next Planned Mods
    Bigger Tires
    Aftermarket Rims

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