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International Automotive Technicians Network
Re: Mack E7 With A Thumping Shake
Posted to HD/Fleet Forum on 2/13/2020

Sound like something has come loose, be it an automatic or a manual, possible flywheel loose, torque converter loose, pressure plate issue. It's been quite a number of years ago but I saw an older Mack break a crankshaft in a manner that it ran just fine excep... Login to read more.