Rear Difffrential Whine

[Modded]

Alright, long story short, I went to the dealer to ask about why my rear diffrential is whining during acceleration before the car gets to 15MPH and shift to the second gear. I was told that at first it was my lowering coil insulators not being there that caused it (I removed them when I installed the Pedders kit). Now they put back the insualtors and changed the ring ear and pinion and it still whine the same way after acceleration before hitting 15MPH.
Now I revisisted them about the same issue and they said it normal and even picked up a customers 08 Tahoe which did infact whine, but not as persistent as mine does. The tech said its normal wear and tear (I have 17000 miles).
The real question is do you'll think its normal (no matter the year of the Tahoe/Yukon), also do you'll techs think its normal?
I found this TSB about something about the same to the problem I'm having..... TSB #070417002.
Also how many miles you'll have will help me too.

 

[mdtahoe]

No it is not normal for any truck. I have a 2007 with 43000 miles and it does not whine at all. Maybe the 2008 has the same problem yours has. I will look at that TSB at work tomorrow and let you know what I think about it

 

[nc6600]

werd, my 07 Yuk has 53,000 miles and is quiet as a mouse.

 

[Modded]

Thats what I'm thinking too, thanks for the info!
Any more?

 

[Nfamous60]

i have 23k and i dont notice a whine but then again i can't drive mines for 3 more weeks..

 

[wmgood64]

I don't think it's good if your rearend is whining!!!

 

[Modded]

Yeah i'm starting to think the dealer may have BS'd me!
Hey MD, did you find out on the TSB?
Also Nfamous where is your truck?

 

[mdtahoe]

I was not able to find a TSB by that number. Can you post a description of the TSB and I will try to locate it that way.

 

[Modded]

Alright here it is,

POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT
TSB #070417002 -- WHINE TYPE NOISE COMING FROM REAR OF VEHICLE (DIAGNOSE AND REPLACE REAR PROPELLER SHAFT). *NJ (NHTSA ID #10023936, OCTOBER 01 2007)

Website is here: http://www.carcomplaints.com/GMC/Yukon/2007/tsbs.shtml

 

[mdtahoe]

I am going to be on vacation all next week so I will not be able to look at the actual TBS until I go back to work. Just reading the title I would say it fits. Have you mentioned it to the dealer? Maybe try a different dealer since the first one can not or will not fix it.

 

[Modded]

No I have not mentioned it yet but I will soon, just don't want this whine to be a future crippling problem.

 

[wmgood64]

I hear a couple of dodge pickups go by my house you can tell it's them before you even see them a whine that shouldn't be there!!!!