Quote:
Originally Posted by oldsinner111
Flex Plate might cause,or convertor.Bolts also get loose,on 617 diesels sometimes front crank pulley will get loose and make you think your throwing a rod.
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Flex plate would only thump when you put in gear... Right? Not at idle.
But then again the trans is right there by you driver foot right?
Could it be a loose trans cooling line?