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Violent Trany Shake in 3rd Gear on A4

This is a discussion on Violent Trany Shake in 3rd Gear on A4 within the Automatic Transmission forums, part of the Drivetrain category; First of all, the trany has been modified. I don't know if it is internally modified or if the Line ...

  1. #1
    Work..Eat..Sleep..Repeat nut6778's Avatar
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    Sunset Orange Metallic
    2002 Z28

    Violent Trany Shake in 3rd Gear on A4

    First of all, the trany has been modified. I don't know if it is internally modified or if the Line Pressures were tuned through the PCM, but it has one hell of a firm shift from 1-2 and a descent shift from 2-3.

    Question is... When driving around in 1st everything is smooth. 2nd, smooth. 3rd, the whole damn car starts to shake violently. Shifts into OD, smooth.

    Any Ideas? Car has 60,000 on it.
    Nut

    2002 Z28

    Track History
    5-10-08 13.522 @ 106.59 72 degrees ~ Stock? No Mods? (this is how I bought it)
    6-14-08 13.577 @ 106.71 93 degrees ~ SLP Lid, Smooth Bellow, and Magnaflow Catback Exhaust
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    Just me Y2KPewterSS's Avatar
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    Driveshaft out of balance maybe?
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    Work..Eat..Sleep..Repeat nut6778's Avatar
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    I thought about that, but once it shifts out of 3rd it's ok. I would think if its the driveshaft that it would get worse as speed increases.

  4. #4
    That guy thearborbarber's Avatar
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    I had a U joint go out in my driveshaft that caused a mild vibration in 3rd gear only. It was the rear U joint and it had a dead spot in it. It felt like it had a detent.

  5. #5
    Work..Eat..Sleep..Repeat nut6778's Avatar
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    Weird...Ok, I'll check it out then.

    I thought if it were anything past the trany that it would do it all the time.

    Thanks for the info.

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