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  1. #1

    Default 99 Tahoe has Locked up Rear Wheels?

    My wife was out of town driving the tahoe when as she explains a big 'cling/banging' noise. she smelled rubber as the truck stopped almost immediately. I can hear and slightly feel the transmission working, but it wont move the truck at all. I figure it's either the REAR END or a locked REAR BRAKE, but I don't know how to tell which one it is. Can someone please chime in and help me troubleshoot this thing? I would greatly appreciate it.


    Thanks

  2. #2

    Default

    *****Thread Moved*****
    To The
    General Chevy/G.M. Tech Section

    Last edited by 99'HEARTBEAT; 03-25-2013 at 05:05 PM.

    MIKE


    99"SILVERADO
    5.3 l 3.73 l G80
    BLACK BEAR CUSTOM TUNE
    SNUGTOP l COLORMATCH l KATZKIN










  3. #3

    Default

    I would probably start by jacking up the rear and having a quick look. The few catastrophic diff failures I've seen have usually punched a hole in the cover which becomes pretty obvious once you are underneath.

    With the rear end in the air and the transmission in N, try turning both wheels. If only one brake locked up, you should be able to turn the other wheel. You may also be able to feel a difference between brake and diff lockup. Something locked up in the diff may have a "backlash" feel to it (the wheels will partially turn back and forth between stops) where a frozen brake will freeze the wheel solid.

    You might try taking both wheels off. If the brakes are free, you will be able to remove the rear drums (may need to retract the shoes), but you will be completely unable to remove the drums if the brakes are frozen.

    While you have it in the air, you might take the diff cover off and inspect the diff. I would expect a frozen diff to be immediately apparent once the cover is off.
    '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

  4. #4

    Default

    ^^^ @MrShorty has it covered.
    Ray

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  5. #5

    Default

    Thanks for the help. unfortunately this is not the only project i'm working on, but I'll will post what I find. If you think of anything else please post.

    - - - Updated - - -

    one more thing, if the brakes are frozen, how do you get the drums off?

  6. #6

    Default

    if the brakes are frozen, how do you get the drums off?
    A repair manual will explain how, but you go in through the backing plate and retract the adjuster screw. This will draw the shoes in and release the tension on the drum. It is tedious, so it will take some patience, and it could require quite a few full turns of the adjusting screw.

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