Hello again. I hope everyone is well. 2005 VNL Cummins ISX Eaton Fuller 13 speed. Had my mechanic change my shifter bushing as the OEM bushing was shot with a ton of play a few weeks ago. After it was changed I noticed this howl very low volume once in a while but didn't think much of it. It shifts very well with no odd shakes, vibrations or shifting from normal. Recently this noise has become louder and it comes and goes. It really happens in low range but does happen in high range when pulling. It only happens when under boost like pulling through the gears. If you keep the rpms low you don't hear it. It was real loud one night recently pulling Monteagle westbound in 12th with a 10,000 pound load. It comes right up from the shifter location. My mechanic says there are no moving parts under there but I know what I hear. He checked fluid levels and everything seems fine under the truck. He thinks it may be an output shaft worn. He did cut the air lines to the shifter when doing the bushing change and connected them with fittings. Perhaps it is an air leak under there? Has anyone ever experienced this? Any ideas of what it may be? Thanks.
https://youtu.be/WdC68CaCyzU
https://youtu.be/j7XSWb_Bolo
Odd intermittent howl from shifter area under boost. Links to video clips within.
Discussion in 'Volvo Forum' started by RubyEagle, Apr 17, 2015.
Page 1 of 2
-
-
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
-
One thing I would check would be sure the boot is buttoned up and not letting in residual noise into the cab. I have seen that be an issue after trans work.
-
Check your fluid level. In all your boxes.
-
CK. the rear sup. air ride leveling valve to be sure its not worn and is set a correct ride hight?
RubyEagle Thanks this. -
Ok will do. I believe the valve was changed just a couple years ago but I'll have it checked out also. Will have fluid checked again. On today's trip the noise was random again and really seemed like it was perhaps coming from right under the shift handle. Like l said l only hear it when accelerating and it is really loud. Thanks for the suggestions, any others?
-
Does the howling change with the different roads you are on. Than it is just road noise. Try to put some fiberglass insulation in your boot or under the floor. Like others have said make sure your boot is sealed to your floor all around.
RubyEagle Thanks this. -
Thanks but l am pretty sure it isn't road noise. You can hear in the videos it is almost a screeching scream once again only under boost.
Fluid levels are full. Looks like tailshaft bearing on the back of transmission is worn and loose with play. Could that be causing this noise? Thanks! -
I think that is in your transmission but could be a loose spring in clutch or clutch brake maybe. There are people better than I to diagnose your problem, I am just guessing.
Good luck.RubyEagle Thanks this. -
There is a silicone coupler behind the engine. It comes off the EGR cooler. Behind your exhaust that comes off the turbo.. Check that.
#29 in the diagramRubyEagle Thanks this. -
Will do. Actually just had EGR Cooler and valve changed a couple months ago when the oil cooler failed. Thanks will check.
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
Page 1 of 2