ETurner

I have the 6 speed trans, at about 60 mph and higher it has a humming noise.I just got back from dealer, tech hears the noise but is not sure what it is.Does anyone else have this problem?If so what was the cure? ???

Hummin Cummins

I have this as well.<br><br>Mine I call a whine...but I could call it a hum.<br><br>Tech didnt hear it in mine.<br><br>Poor efin ears.

RLS

I have a hum in the same place but mine is the trubo. You can hear it wrap up and then slow down. Mine is not very load but the pitch hurts my ears. I am working on a solution.

ETurner

I agree whine is a better description of my problem. Thanks.

spots

You can isolate the noise by changing the variables. Is the noise the same in all gears? More noise in one gear? Let off the throttle, or coast in neutral. Noise gone? Different roadway? Wind direction? Many things will influence a noise in a vehicle. Sometimes exhaust will cause a vibration or drone that is picked up by some people more than others. My 6spd whines in 4th gear worse than 5th or 6th. Not enuff to bug me or worry about tho. Are your tires agressive tread? this will also cause noise, as well as vibration. Let us know what you find. Good Luck

Hummin Cummins

Does it with the clutch in in 6th at 60mph+<br><br>Does it on or off the throttle.<br><br>Goes away when you take the tranny out of 6th.<br><br>Worse on cold days...not as bad on cold days.<br><br>The dealers technician (he is not a mechanic) couldnt decifer this information.<br><br>

Scotty

I dunno if this is starting to become an issue...have a read in the 2nd gen area...<br><br>https://www.dieseltruckresource.com/...60;boardseen=1

ETurner

It does it under throttle.If I let up on petal it goes away.Cold or warm it doesn't matter.I haven't tried it with clutch in or out of gear. I'll try that tomorrow. It seems to be a speed thing, only in 6th gear. I never had it up to 60mph in 5th gear.

spots

[quote author=Hummin' Cummins link=board=20;threadid=12619;start=0#119521 date=1048445938]<br>Does it with the clutch in in 6th at 60mph+<br><br>Does it on or off the throttle.<br><br>Goes away when you take the tranny out of 6th.<br><br>Worse on cold days...not as bad on cold days.<br><br>The dealers technician (he is not a mechanic) couldnt decifer this information.<br><br><br>[/quote]<br><br>Hummin you will need to isolate the vibration from the front driveshaft as yours is a 4x4. I believe the front axle and driveshafts turn all the time. Gonna hafta remove the front driveshaft and then drive it.

Hummin Cummins

[quote author=ETurner link=board=20;threadid=12619;start=0#119554 date=1048457837]<br>It does it under throttle.If I let up on petal it goes away.Cold or warm it doesn't matter.I haven't tried it with clutch in or out of gear. I'll try that tomorrow. It seems to be a speed thing, only in 6th gear. I never had it up to 60mph in 5th gear.<br>[/quote]<br><br>You and I have the same problem. Mine use to go away when the mileage was lower. Now that the milage is higher it stays around. I am just beyond the 3000 mile mark.<br><br>Do you also have a difficult time shifting from 1st to 2nd gear? Mine does. It will not go into second if I single clutch, it will go in with a slight grind if I double clutch. The only way to get to 2nd without refusal or grinding is to wait 4 seconds then enter 2nd gear.

ETurner

I tried putting the clutch in,the noise goes away.<br>I tried taking it out of gear,the noise goes away, both times I was going faster than 60mph. ???

cp

[quote author=Hummin' Cummins link=board=20;threadid=12619;start=0#119754 date=1048511603]<br>[quote author=ETurner link=board=20;threadid=12619;start=0#119554 date=1048457837]<br>It does it under throttle.If I let up on petal it goes away.Cold or warm it doesn't matter.I haven't tried it with clutch in or out of gear. I'll try that tomorrow. It seems to be a speed thing, only in 6th gear. I never had it up to 60mph in 5th gear.<br>[/quote]<br><br>....<br><br>Do you also have a difficult time shifting from 1st to 2nd gear? Mine does. It will not go into second if I single clutch, it will go in with a slight grind if I double clutch. The only way to get to 2nd without refusal or grinding is to wait 4 seconds then enter 2nd gear.<br>[/quote]<br><br>Sometimes you can push the clutch in too far. If it has a clutch brake (and I don't know whether it does or not), pushing the clutch to the floor engages it and will make shifting very difficult. Try pushing the clutch in just slightly past the point where it disengages, not to the floor.

Hummin Cummins

Clutch brake? <br><br>Anywho. Been driving manual transmissions for the past 20 years.<br><br>I think it is the tranny.

Thinman

Does anybody have a problem with gear lash noise in their 6 speed when idling around in lower gears with little or no throttle applied ?

Hummin Cummins

I do, it is the input shaft bearing.<br><br>Prolly nothing to worry about.