Nasty rear end vibration.

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  1. #1
    CelicaSupra.com Member
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    Nasty rear end vibration.

    Bought an 82.
    Got a good deal thanks to a suspicious differential and rear end sort of wobble on acceleration.
    Pro diagnosis 1 - carrier bearing at the two piece drive shaft splice.
    Pro diagnosis 2 - took it to a drive train shop to have the bearing fixed if possible, or new driveshaft fabbed/possibly bought. He rediagnosed it as a "blowed up" diff that was improperly rebuilt, along with a bad seal that let it dry up many, many miles ago.

    Found a replacement diff and installed it. Limited slip is back in action, the wobble/vibration is worse.

    Unbalanced driveshaft? Unbolt it and rebolt it after a quarter turn until I find the original shaft to diff alignment?

    I'm totally lost.

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  3. #2
    CelicaSupra.com Member gamble's Avatar
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    I'm assuming you started with the basics like swapping the wheels front to back? You can disconnect the axles and rotate the wheels/hubs and check for play, that's like 4 bolts per side and easy to do. You can check the axles at the same time too.

  4. #3
    CelicaSupra.com Member tdream's Avatar
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    Check the universal joints. If you can move the back and forth they are gone.


    Sent from my iPad using Tapatalk

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  6. #4
    CelicaSupra.com Member
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    There is play at the U joint/carrier bearing. I figured if the drive train shop said it was okay it was okay. I may try rotating the shaft relative to the diff anyway.

    Hey, I got an upgraded diff out of the deal LOL.

  7. #5
    Boosting Mod SilverMk2's Avatar
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    If it that bad just jack the rear tires of the ground and drive it slowly. It should be pretty obvious to the eye. Generally u-joint and bearings are noisy and make clunks unless they are way overdue. Usually stuff you feel in the seats is suspension and tires.

  8. #6
    CelicaSupra.com Member
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    Is it dumb that tires/wheels hadn't even occurred to me? Hahaha

    The CVs seemed fine while I was down there unbolting/rebolting them.

  9. #7
    CelicaSupra.com Member ddd228's Avatar
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    You may have a warped rear rotor and a dragging caliper/bent rear hub.
    Dave in Seattle. I keep LATE hours.Hidden Content
    '84 type "L" ,Auto ,daily driver. Dk blue.

  10. #8
    CelicaSupra.com Member
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    I just nuked my truck on the way home from work, so this car will be getting my full attention ASAP. I was trying to get the Supra roadworthy to avoid this, knew it was coming.

    I did notice the rear passenger side looked like someone was changing a tire and it fell off the jack...LOL/SIGH. All my 12 years of zero car problems are coming to a head right at this moment.

  11. #9
    CelicaSupra.com Member RedP85's Avatar
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    ensure the front to rear shafts are attached together the following way, so is the orientation of the carrier bearing:
    http://www.cygnusx1.net/Supra/Librar....aspx?S=PR&P=6
    -Jocelyn,
    P85-6MGE SDR(HKS kit c/w IC and F-Con in a box) 225KKm, NAL seats, 2.5 Brullen, ACT clutch, LJM, SS lines, Trip Computer. EuroH4
    P85-5MGE SDR had 439KKm (for 17 years my daily driver, RIP...), 2002 E39 ///M5 LMB Hidden Content
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  12. #10
    CelicaSupra.com Member
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    Oooh, thank you.

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