chatter bars

Back in "the day" engine/clutch chatter was generally associated with clutch problems and/or bad motor mounts..
A quick fix was to pull the vehicle up to a telephone pole, or something similarly anchored. Pull the vehicle up close to the "pole", bumper touching same, trans in high gear, release the clutch as the engine was accelerated to moderate rpm's..
Slipping the clutch, would in theory seat it into the flywheel and pressure plate, it would also burn oil from a leaking rear main that had impregnated the clutch disk. As a general rule this "fix" would solve the clutch chatter problem... For awhile..
Of course it was very common to find '30-40 model Ford V8's with no bars because they were a general pain to attached while trying to align a new engine with the trans. Some "mechanics" just eliminated the bars and/or moved them out of the way..
 
Lawson is correct, chatter occurs because the pressure plate fingers are not making contact equally. I had this problem on a 48 coupe. The problem seems to be more prominent with rebuilt pressure plates as opposed to new. I purchased a new pressure plate and disc from an outfit in the Chicago area who supposedly made them to the ford blueprint. I don't think they are still in business. It did solve the problem. I have found that some of the replacement pressure plates do not have adjustable fingers.
Don in SC
 
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