1. dceratti

    dceratti Member

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    i have a 1969 dodge dart 318 904 trans 71/4 rear. vibrates in park vibrates in gear it gets smoother at a higher rpm I've checked the drive shaft and the torque converter timing is on, what could it be?
     
  2. RogerRamRod

    RogerRamRod The Older I Get, The Faster I Was FABO Gold Member

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    Bad Harmonic Balancer? Sometimes the outer ring "slips" even if it doesn't look bad.
    Possibly someone previously changed Torque Converter and/or Flex Plate from an external balanced engine?
    Though I would expect that to get worse with speed.
    1 cylinder misfiring maybe?
     
  3. dceratti

    dceratti Member

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    i checked and theres no weights on the torque and theres no weights on it
     
  4. Early a body

    Early a body Well-Known Member

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    How long has this been going on? Did you do any work then the vibration appeared.

    How is your timing, what is your base timing set at? Is the timing (mark) jumping around at idle in gear?

    Motor mounts? Transmission mount? Take the transmission tailshaft and try to move it- if it moved your trans mount is bad. and the tans is sitting on the crossmember. Does it do it when you are turning

    since it does it in park, its not the driveshaft. I would be surprised if its the tc too.
     
  5. dceratti

    dceratti Member

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    its been doing it for a while i haven't changed anythingand the timeing is on i have it at 10 before
     
  6. CRUZE 418

    CRUZE 418 FABO Gold Member FABO Gold Member

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    Has the engine ever been out? Or is this the orginal engine? The balancer on my '72 318 was totally junk on the orginal engine. If it's the orginal engine, guessing that the timing chain isn't in the greatest shape either. Overhaul time.
     
  7. dceratti

    dceratti Member

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  8. dceratti

    dceratti Member

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    no not orignal its a 70 factory warranty engine supposedly has 50k miles in it
     
  9. CRUZE 418

    CRUZE 418 FABO Gold Member FABO Gold Member

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    Get some personal second opinions. Keep looking.
     
  10. 512Stroker

    512Stroker We are all here because we are not all there.

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    Take the accessory drive belts off and try it in park. Dont over heat the engine.
    May be a bad fan and/or water pump.
    Busted or sagging motor mounts?
     
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