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Thread: 2 Inch Lift kit vibration

  1. 15th December 2015, 09:32 AM #1
    Hammer H
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    2 Inch Lift kit vibration

    I have a two inch lift and just started to notice a vibration at 70kph and above accentuated under acceleration on standard height. The vibration disapeered when I lowered to highway height. I suspected uni joints.
    On inspection I could not find any movement in the uni joints. Anybody had a similar experience? I will be ordering a few spares.

    Paul
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  2. 15th December 2015, 09:36 AM #2
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    p38arover
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    Is it related to propshaft angles being excessive when lifted?
    Ron B.
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  3. 15th December 2015, 10:08 AM #3
    Hammer H
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    Yes p38arover that is my belief
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  4. 15th December 2015, 04:43 PM #4
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    I agree with Ron. Did the front shaft uni's on mine and mine disappeared.

    I used highway height for normal driving from then on.

    Cheers
    Keithy
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  5. 15th December 2015, 10:27 PM #5
    Hammer H
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    Thanks Keithy,

    I will order, replace the fronts and keep some spares.
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  6. 16th December 2015, 07:10 AM #6
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    Hammer, I had exactly the same issue on mine.
    The rear uni on the front shaft was tight, but was binding at the increased angles.

    Sent from my SM-G900I using AULRO mobile app
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  7. 16th December 2015, 08:06 AM #7
    Hammer H
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    Thanks Benji,

    That helps narrow the offending uni down. Looking at the uni joints connected to the front and rear diffs, I'd think as the vehicle is lifted the diffs rotate which would mantain to a degree the prop angles, where as the uni joints connected to the gearbox would increase thier angles. With the front prop being shorter the angle for the front uni to the gearbox would be greater. That makes sense. Please correct me if that's wrong.
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  8. 16th December 2015, 10:18 PM #8
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    Yep, the uni on the front shaft at the transfer case was my culprit.
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  9. 17th December 2015, 07:12 AM #9
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    Must get around to replacing my uni's. I have the full set (plush the flexi joint for the rear) sitting in the garage. The front prop shaft should always have been a double cardan joint.
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  10. 17th December 2015, 07:43 AM #10
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    Scouse
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    Quote Originally Posted by davidsonsm View Post
    Must get around to replacing my uni's. I have the full set (plush the flexi joint for the rear) sitting in the garage. The front prop shaft should always have been a double cardan joint.
    Does your car have the Rotoflex coupling? I know the parts catalogue shows some P38s having it but I haven't seen one on a Australian delivered car.
    Scott
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