e9500v8 Posted September 17, 2015 Share Posted September 17, 2015 I have a random noise but only when running the pto and it only does it sporadically ! When it makes this noise it tries to turn the drive shaft. It is a loud gear clashing noise. I have 2 pto on this trans. So tomorrow I'm going to pull the 8 bolt pto to inspect. Any ideas would be appreciated. I have a couple of these trans laying around for parts. I know parts for them aren't cheap. So I'm hoping to tear it down and try to make a good one out of what I have. In the mean time someone find me a fuller 18 prefer a 20 series as I'm running it behind a pretty hot V8!!Sent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/41829-12-speed-noise/ Share on other sites More sharing options...
mrsmackpaul Posted September 17, 2015 Share Posted September 17, 2015 sounds like you have air leaking into the High Low part of the trans thru knob might just need a kit in it sounds like the air isnt getting cut off properly or maybe the air rams have are binding and its not coming out of gearPaul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41829-12-speed-noise/#findComment-304125 Share on other sites More sharing options...
Challenger Posted September 17, 2015 Share Posted September 17, 2015 sounds like you have air leaking into the High Low part of the trans thru knob might just need a kit in it sounds like the air isnt getting cut off properly or maybe the air rams have are binding and its not coming out of gearPaulI agree, could be the shift knob. Quote Link to comment https://www.bigmacktrucks.com/topic/41829-12-speed-noise/#findComment-304175 Share on other sites More sharing options...
e9500v8 Posted September 17, 2015 Author Share Posted September 17, 2015 It doesn't continue to grind and it does it worse when truck is headed up hillSent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/41829-12-speed-noise/#findComment-304204 Share on other sites More sharing options...
e9500v8 Posted September 17, 2015 Author Share Posted September 17, 2015 Tranny is ready to hit the ground in a few minutes. Sent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/41829-12-speed-noise/#findComment-304205 Share on other sites More sharing options...
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