Let’s track down a vibration

Discussion in 'Rotating Assemblies' started by DorianL, Feb 12, 2018.

  1. DorianL

    DorianL solid fixture here in the forum Staff Member

    Thanks !!!! Good information

    Btw, I found this pic... fuzzy but, does it look like the ring slipped back. I’m kicking myself for not inspecting while it was out

  2. Maniacmechanic1

    Maniacmechanic1 reliable source of info

    If it moved and slipped the outer inertia ring its a Time bomb waiting to go off.
    Racing parts are not always a good match on a daily driver because they do not adhere to GM Blueprint specs original.
    So working out bugs like alignment issues can be a problem.
    You way out of the USA being in Belgium so you must research.
  3. DorianL

    DorianL solid fixture here in the forum Staff Member

    Well, I got a closer look at the vibration damper and... it looks in good shape.

    However... the transmission mount is completely and utterly shot ! With little effort I can lift the trans off the mount and see the bolts through the torn rubber.

    I think we found our problem. The motor mounts look fine, but if I am going to replace one... might as well replace them all...
  4. DorianL

    DorianL solid fixture here in the forum Staff Member

    Out of curiosity, what are the typical symptoms of a worn/ripped trans mount?
  5. Grumpy

    Grumpy The Grumpy Grease Monkey Staff Member

    yes you may have found your vibration, issue,
    typically the engine transmission , will jump or move physically , very noticeably at idle shifting from forward to reverse,a clunk when shifting,
    hard shifts,difficult shifts,whining drive train,noise
    odd vibrations (like you have described) , occasionally, and /or car wants to wander on a strait level road like it out of alignment

    read these links also



    Last edited: Feb 20, 2018
  6. DorianL

    DorianL solid fixture here in the forum Staff Member

    I am looking FW to fixing this problem... and that pesky oil pan leak !!!!! Then we can start getting down to the real business...
  7. Grumpy

    Grumpy The Grumpy Grease Monkey Staff Member

    its not that difficult to remove the oil pan, replace the gasket with a new one piece synthetic one and cure that leak,
    most guys can do that in a single afternoon with the car up on 4 12 ton jack stands rather easily.
    be aware that the crank counter weights rotated to the correct location makes removing the oil pan a bit easier.
    it might be a great opportunity to swap to a higher capacity baffled oil pan.

    7" deep

    6.5" deep


    7" deep

    theres lots of 8" and 8.25" deep corvette oil pans but they don,t last too long with speed bumps and raised manhole cover rims




    Last edited: Feb 20, 2018
  8. Grumpy

    Grumpy The Grumpy Grease Monkey Staff Member

    I wish both dorianL and RICK were local,
    theres just so many things Id love to jump on and help out,
    I have the lift and tools and a great deal of related experience in diagnose and repairs and mods,
    and both of the guys have obvious skills that I either lack or have not really perfected.
  9. Maniacmechanic1

    Maniacmechanic1 reliable source of info

    Its a Beautiful Corvette.
    Just needs work.

    Summit Racing order.
    Just need $$$$.

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