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differential failure

Yahoo Message Number: 90542
I've searched the archives but haven't found this topic. I'm interested in knowing how rare this might be.
I heard a whine from the rear recently and took it into Petersen Cat. They found the problem to be with the differential and they are rebuilding it. It is expected to cost about $4k.

Is this common at 70k miles?

Thanks,
Jim Coshow

2005 Inspire 51501

Re: differential failure

Reply #1 –
Yahoo Message Number: 90543
70 k is short. What is the cause of the whine? There are usually 2 different gear sets, one that is quieter than the other, due to manufacturing differences. You may have gotten the truck set, It is usually not as quiet as the passenger set. It may be the bearings or lash. It would be helpful to know the cause of the whine. Did it start all at once or develop gradually? IF you can let me know the cause of the whine I can probably provide more info.

Mikee

Re: differential failure

Reply #2 –
Yahoo Message Number: 90544
Did they make a comment on lubrication or the lack of? An inspection of the gears should Tell the story

Re: differential failure

Reply #4 –
Yahoo Message Number: 90546
Depends on the failure. That is why I asked if he could get more info.

Mikee

Re: differential failure

Reply #5 –
Yahoo Message Number: 90547
I just returned from a trip where I started hearing a whine in the area of the rear suspension system. I have a 2008 Allure with 15K miles (with Tag axel). It only occurs during deceleration. It can only be stopped by coming to a complete stop -- I cannot slow and accelerate to stop the sound. It is independent of engine or service breaks. The pitch of the whine changes as I slow, but is not liner with speed, engine speed, or transmission (a complete diagnostics for the MH3000 has been done). The whine also has an oscillation to it. I have gotten two inputs - one is the drive line u-joint possible cause by drive line misalignment and the second is the differential. Before I turn it over to a shop, I am gathering inputs from others. Any input would be helpful. Also, any experience with someone to take the coach to for this problem in the Seattle / Tacoma area would be appreciated.

Thanks
Paul,

2008 Allure

Re: differential failure

Reply #7 –
Yahoo Message Number: 90549
Jim, my opinion is it's completely uncommon. Did you call the manufacture prior to the re-build for discussion.

Thanks, Mike 03 Allure 1st Ave. #30898

Re: differential failure

Reply #8 –
Yahoo Message Number: 90569
The whine seemed to develop gradually and progressively got worse. According to Petersen "The retaining bolt for the lash adjustment broke and the ring gear backed out." I'm not sure where this bolt is located but I will learn so I can inspect it in the future.

Jim

2005 Inspire 51501

Re: differential failure

Reply #9 –
Yahoo Message Number: 90570
The ring gear is adjusted by threaded collar on the outside of the ring gear carrier. One on each side. This is how pattern, preload, etc is adjusted on the ring gear. The pinion is a separate adjustment to set the piniuon depth. They are held in place with a bolt thru the lock. You have to remove the punkin to see them. It is pretty unusual for one of these to break. Is the ring gear re useable or are they going to replace the ring gear and pinion along with bearings, etc? Let me know. I should be able to give you some ideas.

Mikee
 

Re: differential failure

Reply #10 –
Yahoo Message Number: 90629
Had a similar noise during a cross country trip in my 2000 Intrigue. After having the diferential torn apart, inspected, and adjusted for lash, the noise was still there. Then I happened to notice the coach leaning to one side. Found a failed height adjustement valve, replaced it, no more lean, no more noise. Good luck!

Frank Platz

2007 Allure #31451