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99 Escalade | 05 STS
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160 Posts
My rear diff was wearing out and had that whining noise just after my warranty expired... took it to David Taylor Cadillac and my service guy, Roy Harper had the shop foreman take it for a spin with me...

Roy and Bill went to bat for me with GM and they completely re-built my rear end... UNDER WARRANTY.:)

Thanks, Roy!
 

· Registered
99 Escalade | 05 STS
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160 Posts
:alchi:
clickart said:
what kind of noise should I look for if there is something is wrong with my differential?
Mine was going whhhhhhhhheeeeeeeeeaaaaaaaaaaannnnn as I stepped on the accelerator then would back off a little when I let off the gas.

When I would roll to a stop it would make a fluttering noise.... fffffftttfffftttffttffttffffddddddd.

I first had the brakes and calipers completely refurbished then had a third party drop the tranny pan and check for wear, then pointed them to the rear diff and had them check it out.

They said it looked like silver paint speckles were in the diff fluid.

This situation is obviously a problem that does not happen overnight.

As long as you have done due diligence on the maintenance or you purchased the vehicle with good faith that that maintenance had been performed you should NOT have to pay for GM to fix their own factory defect.

Remind your service guys with respect that you are driving the flagship of the GM fleet and that you expect the service to live up to the standard of the Cadillac name.

Use their marketing to remind them of the standards to which THEY must adhere.

Be respectful yet firm AND informed.

My associates have been amazed at how well I've been taken care of.

Part of that is due to the high standards for service and the great reputation of the dealership I bought from and the rest goes to the fact that I was dilligent in my gathering of information.

It doesn't hurt that I know the owner either so if you are not satified bark up the chain to the General Manager first then the Owner.

Make them like you and want to help you.

That is the key at all levels.

Oh, and a gift card to the nearest steak dinner restaurant does wonders with your service guy.
 

· Registered
99 Escalade | 05 STS
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160 Posts
demjjm said:
Good advice for anyone is to make friends with your service advisor / manager. We tip our advisor after every visit and it had paid itself back 10 fold! When our car goes in for service, everyone is waiting in an 1 hour long enterprise rental line, and getting shoved into a envoy, or some other midsize car, while our advisor has our choice of colors of caddies waiting for us. He has also gone to bat several times for us with GM.

I have never had the whine that everyone is speaking of, but I do have what I refer to as "driveline slap". For example if I am rolling in drive (no gas), and I hit the gas with some decent force, I get a knock, or slap from the driveline. Based on my complaints, the differrentials have been replaced, and the transfer case as well. Each time it improves, but then it seems to come back. I am rough on our cars, so this may have something to do with it, but nothing has flat out broken as of yet, and believe me I tried to make it break before I was out of the factory warranty and into the extended one.
Same deal here... it klunks when I do a rolling stop and hit the gas hard to take off again.

It is something that is mentioned in the reviews online of the '99.
 
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