TimberJack Posted December 6, 2016 Share Posted December 6, 2016 T310 transmission started making a knocking sound. At 20 mph at a coast you can hear it pretty good. You can pull it into neutral and it stops. Hoping someone knows. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/47911-t310-knocking/ Share on other sites More sharing options...
gearhead204 Posted December 7, 2016 Share Posted December 7, 2016 have you checked the drain plug magnets? is it only in one gear? are you sure its a trans issue and not a rear end? (the sound will transmit up the drive shaft ) Quote Link to comment https://www.bigmacktrucks.com/topic/47911-t310-knocking/#findComment-354253 Share on other sites More sharing options...
TimberJack Posted December 7, 2016 Author Share Posted December 7, 2016 Yes, I can only hear the tapping nose at low speed. 1-6 Quote Link to comment https://www.bigmacktrucks.com/topic/47911-t310-knocking/#findComment-354275 Share on other sites More sharing options...
TimberJack Posted December 7, 2016 Author Share Posted December 7, 2016 Sound like say there was a bolt and something was hitting the head of it every time it makes around. Quote Link to comment https://www.bigmacktrucks.com/topic/47911-t310-knocking/#findComment-354276 Share on other sites More sharing options...
jkruss82 Posted December 8, 2016 Share Posted December 8, 2016 Is this a new transmission or does it have a many miles? Sometimes a gear will have a bad spot and sound like a knocking during coast. If you have a T310 and its in low speed, the gear set directly behind the mainbox (in the rear box) is most likely the culprit of the knocking noise. That being said this noise may go away after the bad spot gets worn down, but that's only if this is a new or Reman new transmission. Quote Link to comment https://www.bigmacktrucks.com/topic/47911-t310-knocking/#findComment-354415 Share on other sites More sharing options...
TimberJack Posted December 9, 2016 Author Share Posted December 9, 2016 That's guys for all the input. Find the problem it ended up being the peanuts in the front drive. Placed them with new bearings and the sound went away. 👍🏻 Seems like I get one thing fixed and it's something else. Smh truck just started pushing coolant. Quote Link to comment https://www.bigmacktrucks.com/topic/47911-t310-knocking/#findComment-354471 Share on other sites More sharing options...
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