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Deceleration Vibration

Discussion in 'Wrangler JK (2007-2017)' started by tomrr, Sep 27, 2021.

  1. Sep 27, 2021 at 8:14 AM
    #1
    tomrr

    tomrr [OP] Well-Known Member

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    I started to get a slight Deceleration Vibration some where around 35 to 40 mph. I does it in drive and when I select 4 manual. I have a 2012 JK 2-DOOR -Auto Trans with 61000 miles. it does not do it all the time. It shifts fine other wise. The only thing is I put a new set of COOPER RUGGED TREK Tires and run 35PSI IN THEM. I thought about a Transmission Flush. Any other Ideas ??243238207_4370590339673373_8423282590445376956_n.jpg
     
  2. Sep 27, 2021 at 11:49 AM
    #2
    Awrench

    Awrench Well-Known Member

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    Don't flush, replace filter and use correct fluid - not universal, not 1 style fits all,
    not adding an additive to shop generic fluid, use correct fluid.
     
    aggrex and Groundfault like this.
  3. Sep 27, 2021 at 4:38 PM
    #3
    Groundfault

    Groundfault Well-Known Member

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    87 Wrangler, kind of...
    5.7 V8 with Whipple Supercharger, TH350 w/B&M Shifter, NP205 TC, Dana 60 front 4.56, GM 14 bolt 10.5 rear 4.56, 4 wheel discs, Bilstein shocks, 6" lift on 37's, Autometer gauges, all led lighting and a few other things.
    Vibration is caused by rotating mass. Worn suspension can make vibration worse, but shouldn't be causing it.
    When you decelerate, weight is transferring to the front. Check for play in the front driveshaft cv joints.
    If the vibration is coming through the steering wheel, check front axle u joints and wheel bearings.
    If vibration didn't start till after you put on the Cooper tires, I wouldn't completely rule them out. Might try rotating front to back and see if anything changes.
    Let us know what you find.
     
    tomrr [OP] and aggrex like this.
  4. Sep 30, 2021 at 5:09 AM
    #4
    tomrr

    tomrr [OP] Well-Known Member

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    Tom
    Vehicle:
    2012 Wrangler JK
    I had a rock wedged between the exhaust pipe and the cross member.243006988_4370605489671858_4894816372673926450_n.jpg
     
    Justanotherjeeper and aggrex like this.

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