Dealer trying to tell me 10.5" axle whine on decel is normal - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
 
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#1 Old 01-15-2013, 05:23 PM
Destructo09
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Dealer trying to tell me 10.5" axle whine on decel is normal

Can anybody tell me if they have run into this before? I took the truck in for a second time for rear axle noises.

It's a 2008 4x2 Mega Cab 1500 with the AAM 10.5" rear axle. It's whining under deceleration and very noticeable around 50mph.

I had it rebuilt by them under warranty due to noise on acceleration and then the noise changed to deceleration.

Now, they're trying to tell me the noise is ok and that all the specs are in spec from what they can tell and the pattern looks ok. It can be heard easily with all the windows closed so it's not a real minor whine.

2008 Ram 1500 Mega Cab 2WD
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#2 Old 01-15-2013, 05:33 PM
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It's not normal, try a different dealer. If the gears were whining on acceleration and havent been replaced, that might be the problem.

How many miles were put on, with the acceleration whine?
And what's the name of the dealer?

3.73s are stock amd as you know, shouldnt whine
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#3 Old 01-15-2013, 07:09 PM
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R&P were replaced during the initial rebuild. I bought the truck with about 45k miles on it and it was doing it when I bought it. So no clue how long it was doing it before, the previous owner probably traded it in because of it.

It does have 3.73's and it was my opinion they should not whine also, regardless of it being a 10.5" axle.

The dealer is AutoPark Chrysler Jeep, it's not a Dodge/Ram dealer but the same place does have a dodge dealer also (Leith).

Only reason I took it here was because thats where I bought it from and they've been good so far.

The sales guy has offered to make it right for me if they can't fix it but i've grown to love my mega cab and don't really want something else.

I'm going down tomorrow to check it out with the cover off and talk to the service manager. So we'll see what comes of it.

2008 Ram 1500 Mega Cab 2WD
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#4 Old 01-16-2013, 11:37 AM
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I went an found a factory service manual for 08 1500, 2500, and 3500 trucks and it mentions nothing about noise being normal. In Fact in the diagnosis section it describes my exact issue and says it's coming from the pinion bearing.

No where does it mention any whining is ok under normal operation.

This is straight from the service manual:

Pinion bearings have a constant-pitch noise. This noise changes only with vehicle speed. Pinion bearing noise will
be higher pitched because it rotates at a faster rate. Drive the vehicle and load the differential. If bearing noise
occurs, the rear pinion bearing is the source of the noise. If the bearing noise is heard during a coast, the front
pinion bearing is the source.

2008 Ram 1500 Mega Cab 2WD
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#5 Old 01-16-2013, 01:06 PM
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Sounds like to me that the backlash isn't within specs.
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#6 Old 01-16-2013, 01:49 PM
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They told me over the phone the backlash is in spec and the pattern looks good. However I think the issue is actually pinion bearing pre-load. I believe this could still produce a valid pattern but still cause noise. The noise is the bearing itself and opposed to the ring and pinion making noise.

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#7 Old 01-16-2013, 08:25 PM
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Well, they are going to tear it down and try shimming it a bit one way or the other like the "Chrysler engineer" told them to try. I still think it's the pinion bearing pre load.

I could tell by the tech demeanor he doesn't give a shit about my problem, and because the gear pattern looks normal that the noise must be ok.

They keep saying it's gear whine and no way it can be the bearing, I called BS on that but they don't seem to care much.

If they don't fix it, i'm making the dealer take this hunk of junk back and i'm gonna go find a chevy. I never trusted Dodge trucks and it seems like Chrysler has confirmed my concern. Hopefully they fix it and it doesn't come to that, but I have zero confidence in them right now.

2008 Ram 1500 Mega Cab 2WD
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#8 Old 01-17-2013, 11:25 AM
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I didn't think about the pinion preload, that's a very good possibility. I'm just wondering if he said screw and not replace the pinion bearings at all. So that would account for the noise because the pinion shaft was never removed to begin with.
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#9 Old 01-17-2013, 01:47 PM
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I was told all the bearings were replaced. I'm wondering if they didn't check pre-load using proper methods and got a artificially high number or something so it's not set right.

Or, heck, maybe the housing is screwed up somehow and no matter what they do it won't be right. Only option then is to replace the whole thing.

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#10 Old 01-17-2013, 02:25 PM
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Quote:
Originally Posted by Destructo09 View Post
Well, they are going to tear it down and try shimming it a bit one way or the other like the "Chrysler engineer" told them to try. I still think it's the pinion bearing pre load.

I could tell by the tech demeanor he doesn't give a shit about my problem, and because the gear pattern looks normal that the noise must be ok.

They keep saying it's gear whine and no way it can be the bearing, I called BS on that but they don't seem to care much.

If they don't fix it, i'm making the dealer take this hunk of junk back and i'm gonna go find a chevy. I never trusted Dodge trucks and it seems like Chrysler has confirmed my concern. Hopefully they fix it and it doesn't come to that, but I have zero confidence in them right now.
FIND ANOTHER DEALER dont blame the manufacturer go to a 5 Star dealer this one sounds like a joke


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#11 Old 01-21-2013, 02:38 PM
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Apparently when they tore it down to "try" something to fix the problem they discovered a bad bearing. It was replace before but apparently once they got the carrier out they noticed a hard spot when rotating the pinion by hand.

So they should have it replaced and put back together early this week.

Quote:
FIND ANOTHER DEALER dont blame the manufacturer go to a 5 Star dealer this one sounds like a joke
I probably will take it somewhere else after this, the only reason I took it here was because I have bought a couple vehicles from them and they seemed to do a great job the first time I had an issue. But clearly I understand now how things will go if I have a real problem.

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#12 Old 03-12-2013, 05:10 AM
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I have had nothing but problems with my local dealer. The shimming they are talking about will change the tooth pattern. They said that was good, typically the problem lays with getting the pinion nut torque correct while maintaining the pinion rotation torque value. Unfortunately they like to use an impact wrench to set the pinion nut and it basically can't be done without a lot of luck thrown into the mix. Good luck.. IMO find another dealer..

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#13 Old 03-12-2013, 07:48 PM
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HAHAHAHAHA, buy that Chevy and let us know how that goes!

Been there, and strayed once away from Dodge. Will never do it again. My 2002 Chevy truck was an expensive POS. Everything was either falling apart or making noise, or just plain crap.

I've had 3 Dakotas and 3 Rams now. All with ZERO issues. The one Chevy I had, managed to gobble up huge amounts of time with it's issues.

These are mechanical devices. They ALL have issues from time to time. Just look at Toyota! LOL. A leader in reliability, and good construction. So, we thought. Now, Toyota leads the industry in recalls. The new Camry scored last place in safety testing.

Let us know how you like that Chevy!!



.

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#14 Old 03-16-2013, 10:32 AM
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That's all set up not bearing, bearing is an excuse.

see a reputable driveline shop that specializes in diffs, not a dealer

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#15 Old 03-26-2013, 03:14 PM
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Originally Posted by Supershafts View Post
That's all set up not bearing, bearing is an excuse.

see a reputable driveline shop that specializes in diffs, not a dealer
I would, except then I have to pay for it.

It's been fairly quiet but seems to be getting a bit louder over time again. I'll probably give it some time and let it get noisy again and take it somewhere else. These guys gloated how they were axle guys and I just laughed inside.

I may just take it to a driveline shop and pay them to write up an evaluation and use that at the dealer.

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#16 Old 03-26-2013, 03:15 PM
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Quote:
Originally Posted by Redtruck-VA View Post
I have had nothing but problems with my local dealer. The shimming they are talking about will change the tooth pattern. They said that was good, typically the problem lays with getting the pinion nut torque correct while maintaining the pinion rotation torque value. Unfortunately they like to use an impact wrench to set the pinion nut and it basically can't be done without a lot of luck thrown into the mix. Good luck.. IMO find another dealer..
That's exactly what I tried telling them, but they were so sure it was perfect. They also told me it was gear noise, not bearing. Which I think is bogus.

2008 Ram 1500 Mega Cab 2WD
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