ljt Posted December 1, 2013 Share Posted December 1, 2013 (edited) There's a chatter sound that started after disengaging the pto of the truck. Its a 1972 mack dumptruck. Not sure the cause or where to begin but doesn't sound good. Ideas? Its something with the transmission is not disengaging I think. .. Edited December 1, 2013 by ljt Quote Link to comment https://www.bigmacktrucks.com/topic/33713-unknown-sound/ Share on other sites More sharing options...
jeffmackb Posted December 1, 2013 Share Posted December 1, 2013 If it's a 'Maxitorque' box, they often rattle or chatter when in neutral. Quote Link to comment https://www.bigmacktrucks.com/topic/33713-unknown-sound/#findComment-219414 Share on other sites More sharing options...
ljt Posted December 1, 2013 Author Share Posted December 1, 2013 No. That's not it. Its a new chatter after disengaging the pto. If you push the clutch in it stops. Its coming from the transmission it seems as if something is not totally disengaging but the pto is not turning. Quote Link to comment https://www.bigmacktrucks.com/topic/33713-unknown-sound/#findComment-219419 Share on other sites More sharing options...
MACKS Posted December 1, 2013 Share Posted December 1, 2013 Had an old dm that did that,it was the throw-out bearing. Quote Link to comment https://www.bigmacktrucks.com/topic/33713-unknown-sound/#findComment-219422 Share on other sites More sharing options...
Mike Posted December 1, 2013 Share Posted December 1, 2013 Had an old dm that did that,it was the throw-out bearing.That is what I was thinking and or pilot bearing.mike Quote Link to comment https://www.bigmacktrucks.com/topic/33713-unknown-sound/#findComment-219429 Share on other sites More sharing options...
theakerstwo Posted December 2, 2013 Share Posted December 2, 2013 I had a sound under my hood when I started it one morning before daylight that sound like a siren.I looked down and seen that my alter had stop charging so I shut it off but the sound was still there and now I know its under the hood. I get my light out and raise the hood and out jumped half of a tom cat. The other half was under the belts and they had jumped the pulleys.That old cat crawled off down to the creek before he stopped whining. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/33713-unknown-sound/#findComment-219494 Share on other sites More sharing options...
thomastractorsvc Posted December 2, 2013 Share Posted December 2, 2013 does it make any noise when the PTO is engaged? Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/33713-unknown-sound/#findComment-219520 Share on other sites More sharing options...
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