Grinding on the tight turns

[DunwellRig]

I have 30,000 miles on my 07 AWD. At 10K it started to grind on tight turns. It felt like the old 4x4's with the rear end going a different speed than the front hubs. Honda dealer said quite common for oil in rear end to break down to cause the problem. Oil replaced and all good again, but now at 30K it is back. Any similar issues like this out there or tips?:confused: Thanks from a rookie member.
Update.
As soon as I hit post thread I found my answer based on similar threads that the system found. Guess I should have used the search engine first. Proof that I am a rookie. Thanks.

[Black Pearl]

The maintenance minder on the 07 is calling for oil changes at about 15 to 20 K. So the fact that you need another change at 30K is not terribly out of line. However the fact that your V had made noise at 10 K and then again 30K, while perhaps not extremely rare, is not cause for joy.

There are two TSBs on the 07 rear axle

07-021
http://www.in.honda.com/Rjanisis/pubs/SB/A07-021.PDF

and

07-024
http://www.in.honda.com/Rjanisis/pubs/SB/A07-024.PDF

You will note that the corrective action on 021 was to change the rear axle clutch pack. On 024, they have a 3 time drain and refill with a clutch burnish.

Due to the fact that you had noise (and not just MMI scheduled fluid changes) I would recommend printing both TSB and taking them to the dealer and discuss what was done the first time around. If your vehicle falls in the VIN range of coverage on 021 and you have the symptoms stated, I think you have reasonable ground to request the TSB be performed on vehicle under warranty.

Whether 021 applies or not, I think that you have reasonable ground to demand 024 performed under warranty.

The MMI indication of 15 to 20 K is for regularly scheduled fluid changes not for noise. Honda issued the TSBs and your dealer should have performed them (if they were issued then). If they were not yet issued when you had the 10K trouble, that is not your fault. Noise at 10K is not normal. Noise at 30K after the oil has been changed once is not normal. It may be common, but it is not normal and I don't think you should be responsible for the repair when Honda has issued TSBs and your vehicle is still in warranty.

Oh yes, welcome to the club and we hope that you get your rear differential woes fixed up.

[Parkworker]

I had the same problem with my AWD CRV. Once i had the rear differential lubricated it solved the problem, now i make sure to ask them to lube the differential whenever i have them change the Diff Fluid. :)

[Black Pearl]

I had the same problem with my AWD CRV. Once i had the rear differential lubricated it solved the problem, now i make sure to ask them to lube the differential whenever i have them change the Diff Fluid. :)

What exactly do you mean by "lube the differential"? To the best of my knowledge (which admittedly is fairly miniscule) the only service performed on the rear differential is changing the rear differential oil using only Honda Dual Pump Oil (currently Dual Pump Oil II) and possibly burnishing the clutch plates if noise has developed.

Who exactly is lubing your rear differential, a Honda dealer or some third party?

Out of my own personal ignorance here, I must emphasize a big CAUTION with this post. I have been following this rear differential issue fairly closely on this forum and I have never heard of lubing the rear differential.

Again, to the best of my knowledge nothing goes in that rear differential but Honda Dual Pump Oil.

2RedVs, Tsmithvt, and Hondatech please chime in!

[tsmithvt]

"Lubing the differential" and changing DP II fluid should be one in the same. If the DP II fluid is changed, there is nothing else to do. :)

[Parkworker]

I only use Honda Dual Pump fluid for the rear differential.

(With the exception of the oil I only Honda Fluids in the CRV)
:)

[DunwellRig]

Update. I took my rig into the Honda shop. They did the triple flush burnishing of the rear end. They also agreed that the rear end may need to be replaced per the service notice and will do so if the issue comes back within the next 20 K.
Appreciate all the replies.:)

[Black Pearl]

The only thing I don't like about the solution your dealer gave you is that in 20K you are going to be well past the warranty (unless you purchased the extended warranty). If your VIN falls in the range for TSB 07-021 and the vehicle is making noise in cold weather then one would think that they would perform 07-021.

Here is the problem in my mind. 021 doesn't fool around with "try this and try that and say abracadabra 3 times and see what happens in 20k." It is a blunt one liner:

"Replace the rear differential clutch assembly."

And it says that because it is not correcting Honda's Dual Pump Fluid shortfalls which 07-024 addresses, but rather is correcting a problem in the clutch material.

Furthemore it has the standard warranty yack:

"WARRANTY CLAIM INFORMATION
In warranty: The normal warranty applies....

Out of warranty: Any repair performed after warranty
expiration may be eligible for goodwill consideration by
the District Parts and Service Manager or your Zone
Office. You must request consideration, and get a
decision, before starting work."

One might think "Oh good I'll be eligible for goodwill consideration." But the bad news is that it is almost a standard blurb, and why should you be "eligible" when this problem cropped up during the warranty period twice--it should be guaranteed.

I don't know the details of your situation. 1. If the VIN is not in the range of the TSB. or 2. the vehicle is not moaning in cold weather, then the problem does not fall under 07-021, and I doubt your dealer is going to be able to perform it on your vehicle today or in 20K under warranty or goodwill consideration.

If the VIN is in the range and the vehicle does make the noise in cold weather, then why not simply do the TSB now?

[DunwellRig]

The VIN is not in range so that was the reason for the push back by dealer. I have another 5k trip planned in August so I suspect by late fall I will have the problem back. At that point I will definitely push for the new rear end vs being Mr. Nice Patient Guy again.
Thanks for the good advice.