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Is it my differential or u joints?

This is a discussion on Is it my differential or u joints? within the General Help forums, part of the LSx Technical Help Section category; Okay so me and my friend were having a little race my car has had some problems with the rear ...

  1. #1
    Junior Member
    Join Date
    Jun 2012
    midland tx

    2001 pontiac trans am

    Is it my differential or u joints?

    Okay so me and my friend were having a little race my car has had some problems with the rear end it hops real bad at a launch unfortunalty he wanted to race from a dead stop my idiot self went for it so after we raced i heard this clunking kind of noise i think i blew out the whole rear end but im not sure if its just my u joints or the spyder gear because its still going through gears perfectly but when im just coasting it sounds like its hitting against something Im pretty sure someone has went through this same problem with a 2001 trans am ram air Please help me not really sure whats the problem

  2. #2
    Paid off 1/27/14 cammed goat's Avatar
    Join Date
    Jan 2009
    Paterson/Ridgewood, NJ

    Phantom Black Metallic
    2004 GTO M6

    Put the car in the air and spin the rear wheels back and forth. While doing so, check to see if the driveshaft is wobbling around. Could be a U-joint or, worse case scenario, pinion bearing. Also check to see if there is any wetness around where the driveshaft goes into the rear end. If the wetness is severe, my guess would be the pinion bearing is shot.

  3. #3
    Moderator 35th-ANV-SS's Avatar
    Join Date
    Oct 2008
    Wherever life takes me

    02 35th LE Camaro SS

    Wheel hop destroys rear ends. I'm putting money on it being the rear end. Hopefully for you though it isn't.
    It's stock.

  4. #4
    None Shall Pass Knight's Avatar
    Join Date
    Jan 2010
    East of Cleveland, Ohio

    99 WS.6 - Modified

    I'm with Jon. But I'd do as Rich suggested, which should tell you where the problem exists. You could also pull the rear diff. cover and do a visual inspection.

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