Reply to "vibration....pulsing shutter - ZF problem?"

bosswrenchMember

FWIW, loose bolts holding the u-joint flanges to the halfshafts will cause a shake. I found this by accident on a '71 during a run- one bolt of the 16 had a cracked lock-washer that had fallen out, leaving the bolt loose. 3/4-turn tightened it up and thats all it took to cause a shake under power! Since then, this shake-under-acceleration has been found on two more Panteras across the U.S with loose bolts in the halfshafts, so check to see if the bolts are tight in your car!

11/10/088:39 PM

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