Couple of questions...
I have a new (2017) Class C, Thor Freedom Elite 29FE on a Ford Chassis. My first question is this: At speeds of 30 to 50, there's a bumping sensation that feels like a tire out of balance. Is it possi...
Forum Discussion
Kinda been lurking to see what others would comment and if you had found the answer / problem fixed...
We purchased a used 2011 Winni Aspect 28B 12,800 miles on it.
On the test drive I did notice a slight low rumble noise sounded like cupped tires.
The owner mentioned he had the tires replaced just 2 months before do to the Michelin tire recall.
So I looked at the tires and noticed they were BFG Commercial tires.
Noticed the tread was a bit more open tread then the Michelin LTX's .
Thinking it was the tires causing the noise...
On our maiden shake down run noticed the noise and slight vibration came in at 53 mph and pretty much completely gone at 69 mph.
Thinking it might be the tires, I got a hold of the Tire shop and Michelin and they swapped out the BFG's for new Michelin's .
Guess what noise/vibration still there.
So I started looking online at noise/vibration concerns , came across an article about nose/vibration and causes. It mentioned drive-line drone , u-joints , out of balance drive-line to a bad drive-line itself. Yoke not being welded on centered...
The article mentioned about the vibration could cause the rear trans shaft seal to leak.
I crawled underneath the MH while doing another project and noticed the rear trans shaft seal was in fact leaking !
I brought the MH into the local Ford dealership that works on MH's.
Explained the trans leak concern and the noise/vibration I had.
Told them I had tires swapped out and it still did it.
They test drove it , verified the leak and verified the noise.
They said once they aired up the rear air bags the noise went away.
Their recommendation "run the air bags at 80psi"
I said NOPE what is the fix ? They came back with the rear leaf springs had settled,, dearched...
So they replaced the rear leaf springs , replaced the trans seal, called and said it was ready to pick up.
I didn't even make off the freeway on-ramp onto the freeway and the noise /vibration right on cue 53 mph.
Circled around came back, got another tech to go for a test drive.
He said it was Drive-Line Drone. The angles need to checked.
So I made another appointment to bring it back at a later date.
But before bringing it back to the dealer I took it back to the tire shop and had them Road Force Balance all 6 tires even tho the noise vibration is coming from the rear of the MH.
All u-joints show good, tech states the angles of the drive-lines are off, so after ordering and shimming the rear of the trans center carrier support and drive-lines , I come back for another test drive, absolutely no change.
They removed the drive-lines and they will be at a Drive Line place tomorrow having the balance checked.
This may have absolutely no resemblance to the OP question ?
But the noise I heard sounded just like going from nice street tires to off road MS tires that were cupped really bad.
It doesn't seem to change pitch of noise / vibration by speeding up or slowing down.
It just appears at 53 mph and is gone at 70 mph.
I can speed up to 75 mph ,let off the gas, put the trans in neutral and shut the engine off, once it slows down below 70 mph the noise starts and once below 53 mph the noise is gone.
We purchased a used 2011 Winni Aspect 28B 12,800 miles on it.
On the test drive I did notice a slight low rumble noise sounded like cupped tires.
The owner mentioned he had the tires replaced just 2 months before do to the Michelin tire recall.
So I looked at the tires and noticed they were BFG Commercial tires.
Noticed the tread was a bit more open tread then the Michelin LTX's .
Thinking it was the tires causing the noise...
On our maiden shake down run noticed the noise and slight vibration came in at 53 mph and pretty much completely gone at 69 mph.
Thinking it might be the tires, I got a hold of the Tire shop and Michelin and they swapped out the BFG's for new Michelin's .
Guess what noise/vibration still there.
So I started looking online at noise/vibration concerns , came across an article about nose/vibration and causes. It mentioned drive-line drone , u-joints , out of balance drive-line to a bad drive-line itself. Yoke not being welded on centered...
The article mentioned about the vibration could cause the rear trans shaft seal to leak.
I crawled underneath the MH while doing another project and noticed the rear trans shaft seal was in fact leaking !
I brought the MH into the local Ford dealership that works on MH's.
Explained the trans leak concern and the noise/vibration I had.
Told them I had tires swapped out and it still did it.
They test drove it , verified the leak and verified the noise.
They said once they aired up the rear air bags the noise went away.
Their recommendation "run the air bags at 80psi"
I said NOPE what is the fix ? They came back with the rear leaf springs had settled,, dearched...
So they replaced the rear leaf springs , replaced the trans seal, called and said it was ready to pick up.
I didn't even make off the freeway on-ramp onto the freeway and the noise /vibration right on cue 53 mph.
Circled around came back, got another tech to go for a test drive.
He said it was Drive-Line Drone. The angles need to checked.
So I made another appointment to bring it back at a later date.
But before bringing it back to the dealer I took it back to the tire shop and had them Road Force Balance all 6 tires even tho the noise vibration is coming from the rear of the MH.
All u-joints show good, tech states the angles of the drive-lines are off, so after ordering and shimming the rear of the trans center carrier support and drive-lines , I come back for another test drive, absolutely no change.
They removed the drive-lines and they will be at a Drive Line place tomorrow having the balance checked.
This may have absolutely no resemblance to the OP question ?
But the noise I heard sounded just like going from nice street tires to off road MS tires that were cupped really bad.
It doesn't seem to change pitch of noise / vibration by speeding up or slowing down.
It just appears at 53 mph and is gone at 70 mph.
I can speed up to 75 mph ,let off the gas, put the trans in neutral and shut the engine off, once it slows down below 70 mph the noise starts and once below 53 mph the noise is gone.
