Has anyone else experienced a grinding in th e rear end (brakes?) when backing or turning?

Yes, I have that grinding in the rear brakes when backing up and turning. My XLR is at the dealer right now for a paint scratch and the technician noticed it on his own as he was moving the car to their garage. They are looking in to it. I originally thought maybe the parking brake never fully released, but no messages ever came up to that effect. If they figure out what is causing the grinding, I will post it here.

Yes, I have that grinding in the rear brakes when backing up and turning. My XLR is at the dealer right now for a paint scratch and the technician noticed it on his own as he was moving the car to their garage. They are looking in to it. I originally thought maybe the parking brake never fully released, but no messages ever came up to that effect. If they figure out what is causing the grinding, I will post it here. Yes! Right after washing the car. Look at the rotors and you will see they rust up pretty well after washing. This is normal as the metal that works best for brakes also rusts easily... not usually a problem since the heat generated by braking keeps them dry. The first couple of times after a drive-way-wash-and-back-to-the-garage results in a distict grinding noise until the rust coating is brushed off.

I've had the same problem when i frist back up from the garage, after going foward the noises go away. Hate to go to the dealer, when i get there all is Ok.

12-10-2004, 04:04 PM #1
XLR I FL
XLR Pit Crew


Join Date: Oct 2003
Location: Florida

Rear End Noise (fyi)

--------------------------------------------------------------------------------

I had been experiencing a noise from my rear end when I was turning (similiar to the plates in a positraction unit sticking) I mentioned this when I went into my dealer yesterday to get an oil change.

They called the factory and were appraised that there was a "new fix" for this condition. It seems that they use;
-- Positraction Additive GM PART # 1052358 (used in other GM models).
-- GM Synthetic Differential Fluid GM PART #89021669.

I have run the car some and it seems to have quieted down some and I expect it to go away after the new fluid and additive get to all of the rear end parts.


I'll let you know what happens over the next few weeks.

--------------------------------------------------------------------------------
Last edited by XLR I FL : 12-12-2004 at 05:02 PM.

I just took mine in for the second time for this issue.

They called and said it is ready to pick up. I'll let you know if its fixed.

2004 XLR, 5800 miles

Yes! Right after washing the car. Look at the rotors and you will see they rust up pretty well after washing. This is normal as the metal that works best for brakes also rusts easily... not usually a problem since the heat generated by braking keeps them dry. The first couple of times after a drive-way-wash-and-back-to-the-garage results in a distict grinding noise until the rust coating is brushed off.


This seems to happen all the time - not just when the car has been washed, and even after it has been driven for a while. I guess it is time to hammer on the dealer. Maybe he can also fix the intermittent screaming fuel pump too.
:(

don2545

Picked mine up yesterday. On the service notes, they said they couldn't duplicate my complaint (grinding, rubbing from rearend). However, they replaced the differential fluid and added the additive mentioned above and wow - its seems to have worked.

Looks like the service bulletin is the key.

I remember some folks saying they needed brakes after a short period, I, for the first 7,000 miles used my gears to slow the vehicle and therfore I though I was helping the brakes last longer. After 7,000 more of driving to NYC without hardly using the brakes they started squeeling up front............Is this under warrenty?
I got a sort of negative answer about the brakes from my advisor when I told him I was bringing my car in to be repainted after the terrible job that was done after my crunch on the 4th of July.

As some of you are aware, I got the so call fix for the heat coming from the console which didn't help. Going back east in 100 degree temps, the heat was so bad that I had to shift my body as close to the door as possible to get away from the heat, that I estimate was about 130 to 140. I wish I had had my heat gun from work with me so I could have verified it. I've told my dealer that I want the dash torn apart and a Y attachment put on one of the ducts feeding the vents and have it directed into the front of the console to cool this area. We couldn't put our water bottles in the cup holders or we would be drinking hot water within a half hours. The bottles of water had to be kept by the doors to keep them cooler.
I hope they will listen to me so I don't have to lemon law this vehicle, which I have documented for two times and this will be the third, I will have no choice but to Lenon law this vehicle.
What a shame, they actually crush a lemon so it is not sold to the public.

My 2005 doesn't seem to have this problem. Cup holders are reasonably cool and the seat temp is comfortable.

Cadillac knows this didn't fix itself and somebody at Cadillac knows what refinements were made from 04 to 05.

Stay on their case Bob and you will get it fixed. They don't want it back. :flag

Thanks Jack, I just have so much to be worked on when I take it in Monday that I'm going nuts.

1. Repaint the whole front end and blend it into the doors
2. Hot console
3. 14,000 and I need new brakes (warrenty or not?) what do you think?
4. Service stabiltrack comes up all the time,
5. RF tire over inflated comes up, and it is only 41 after running for hours.

I still have maybe 5 months for my V so why should I deal with these problems for that period of time. I agree some of these things aren't major like the retractable top not working correct.
My 2005 doesn't seem to have this problem. Cup holders are reasonably cool and the seat temp is comfortable.

Cadillac knows this didn't fix itself and somebody at Cadillac knows what refinements were made from 04 to 05.

Stay on their case Bob and you will get it fixed. They don't want it back. :flag

Lucky you have that "V" on order...........It may take Allen most of the time from now to January fo complete your list............. :flag

Hi Jack,
When I drop my car off on Monday, I'm going tin to see Scott Allen and see if he is aware of my paint problems. I have a feeling that they have kept him in the dark on this screw up. I'm also going to expect to have a car available for me even though this was an accident, they didn't fix it right the first time. I guess any dealer is only as good as their employees in the technical department. I still think they are tops


Lucky you have that "V" on order...........It may take Allen most of the time from now to January fo complete your list............. :flag

Hi Bob....I agree they are good.......
So good that I sent Scott Allen a letter telling him so.
I first went to Allen on your recommendation...Maybe you can get some points for the referral. :flag

The points would be nice, but I shouldn't have to bring that issue up. I should get great service just because I own a Cadillac, not to mention having a V on order with them. Everyone at Allen agrees that this guy Smith, in the paint department, is very arrogant and after seeing what he puts out, would hope no one takes their baby into him. It seems that he is the only paint tech in that department and has only a few flunkies to do the odds and ends, so in his defense, he is probably over worked and hasn't got the time to bring out perfection in his work.

I know, first I shoot him, then I take him to the doctor. It's tough to say something bad about a great outfit like Allen Cadillac.Bob

Hi Bob....I agree they are good.......
So good that I sent Scott Allen a letter telling him so.
I first went to Allen on your recommendation...Maybe you can get some points for the referral. :flag

As some of you are aware, I got the so call fix for the heat coming from the console which didn't help. Going back east in 100 degree temps, the heat was so bad that I had to shift my body as close to the door as possible to get away from the heat, that I estimate was about 130 to 140. I wish I had had my heat gun from work with me so I could have verified it. I've told my dealer that I want the dash torn apart and a Y attachment put on one of the ducts feeding the vents and have it directed into the front of the console to cool this area. We couldn't put our water bottles in the cup holders or we would be drinking hot water within a half hours. The bottles of water had to be kept by the doors to keep them cooler.
I hope they will listen to me so I don't have to lemon law this vehicle, which I have documented for two times and this will be the third, I will have no choice but to Lenon law this vehicle.
What a shame, they actually crush a lemon so it is not sold to the public.


I don't know where you heard that, but nothing could be further from the truth. Most cars that are "re-acquired" or "lemoned" are repaired and sold at auction or thorugh the dealership that handled the paperwork. All the DMV requires it that the title be branded as an RAV, Buyback or Lemon Law casualty.

The console heat issue is inherent to the XLR and also the C6 Corvette. I'm not sure if such an issue would be resolvable under the lemon law as it is currently written.

I've never had a problem with the hot console, it fact it stays reasonably cool.
I thought maybe it had to do with my Borla Exhaust giving it better air flow, since the pipes run right down the center. I can't be sure that's it because I put them on within the forst few weeks I got the car. Did those of you that got the Corsa system notice an improvement in your console temp??

After getting my car back Friday night from its first service, they told me ther was no fix for the center console heat. They also told me that they don't do the brake upgrade unless they squeal. Anyone know differently?

After getting my car back Friday night from its first service, they told me ther was no fix for the center console heat. They also told me that they don't do the brake upgrade unless they squeal. Anyone know differently?


only if they squeal and and still under 10k miles,
after that they consider normal wear and tear

Has anyone else experienced a grinding in th e rear end (brakes?) when backing or turning?

From under the car Some where. Goes away soon after going forward.

Does anybody found the fix. As I said the noises go away when at the dealer. :banghead

I've got the Corsas (love em) and have no problem with console heat.

I don't remember any heat problem even before the Corsas though. :flag

Talked to a rep yesterday that said the pumpkin has floating gears, (not in oil) and have a tendancy to dry out. As soon as you get moving the oil lubes the gears, but can make noise when turning until that time. Hope this isn't bogus information

Bob http://smileys.smileycentral.com/cat/a05/18_12_7.gif (http://www.smileycentral.com/?partner=ZSzeb001_ZNxdm414YYUS)Got time for mine. Fooooooooooouuuuuuuurrrrrrrr

From under the car Some where. Goes away soon after going forward.

Does anybody found the fix. As I said the noises go away when at the dealer. :banghead

jacqueshar:

YOU must not be reading all of the posts on this subject!!!

Print out my Post #5 and take it to the dealer. They will change the rear end fluid and add the positraction lube and you'll be "Good To Go".

Regards.

Yup, I've got mine in at the dealer for this noisy clutch pack. Told them about the additive and at least they nodded like they knew what I was talking about. The traction and ABS icons won't go out and that's another thing they'll deal with. BTW, seems when these lamps (icons) stay lit, the cruise doesn't work. Related?

Oh, they loaned me an SRX. Whatever that is. It's black. Looks like a hearse for little people. Ugly piece.

jacqueshar:

YOU must not be reading all of the posts on this subject!!!

Print out my Post #5 and take it to the dealer. They will change the rear end fluid and add the positraction lube and you'll be "Good To Go".

Regards.
Got the car back same day on Wendesday . They Drained and Changed the differential with synthetic Fluid, and added additive to differential. I let it rest over nigth And took it out yesterday. No more Grinding noyses.

See how long it will last.

I have the same problem here in Jacksonville Florida. Of course it has been worse with the recent heat wave here on the East Coast.

Iced Tea would turn into Hot Tea if you put it in the drink holder.

Standby will be proud. I used his recent trip as an example of how to make a cutomer uncomfortable in thier car on a long trip.

I asked that they log a customer complaint from me as well. Maybe if all of us did that the GMMer's would be more interested in finding a solution.

Many of us are/will be ready for our next car purchase so IF I were them I would want to know how to make us happy.

So go on down to your dealers and log a complaint the next time your are in the area.

GLAD TO HEAR IT!!!!

I DOUBT that you will have any more trouble. BOTH fluids are synthetic and work well. IF YOU DO just request that they change the fluids again.

This is the same stuff used in the Corvettes for their positraction differentials.

That's great, but I went to the top dog (Pat) who I have had many conversations concerning the heated cup holders and he told me it was a design flaw and therefore I couldn't lemon my 04.............How's that for telling me to put it where the sun doesn't shine.
He also said he was in a meeting of caddy reps recently and they where telling eveyone about there wonderful fix that they did to a 04 in California. This happened to be my car. So this guy Pat tells him that it didn't work and the customer has a fix............Lemon his vehicle or T off one of the AC ducts and feed it down the console. He was told they don't have room to do such a fix and it was a design flaw and the customer cannot Lemon Law the car. We are dealing with Semi Hole Indians if you know what I mean.
When I get my new one and it has the same flaw, I will push this into Bowling Green if I have too.


Iced Tea would turn into Hot Tea if you put it in the drink holder.

Standby will be proud. I used his recent trip as an example of how to make a cutomer uncomfortable in thier car on a long trip.

a.

I have the same problem here in Jacksonville Florida. Of course it has been worse with the recent heat wave here on the East Coast.

Iced Tea would turn into Hot Tea if you put it in the drink holder.

Standby will be proud. I used his recent trip as an example of how to make a cutomer uncomfortable in thier car on a long trip.

I asked that they log a customer complaint from me as well. Maybe if all of us did that the GMMer's would be more interested in finding a solution.

Many of us are/will be ready for our next car purchase so IF I were them I would want to know how to make us happy.

So go on down to your dealers and log a complaint the next time your are in the area. Is yours an '04? I haven't had that problem in my '05... although my Corvette tends to get a little warm.

Yes it is an 04. So far I am pleased with the car, had it since 10/2003. But with 2500 miles only. Have other cars to drive. My dog don't apreciate been on the XLR. Love my Chevy Pickup.

Yes it's an 04 and I've just got to go another 4+ months till I get my new V, so I think I'll just live with it and forget about bashing GM. Is yours an '04? I haven't had that problem in my '05... although my Corvette tends to get a little warm.

Yes it is an 04. So far I am pleased with the car, had it since 10/2003. But with 2500 miles only. Have other cars to drive. My dog don't apreciate been on the XLR. Love my Chevy Pickup.

:glol :glol :glol :glol :glol (Good Post jacque! Very pithy.)

At the risk of alienating dog lovers everywhere, I pose the rhetorical question:

What does a dog know? :confused

CAly: YES mine is a 04. the shifter shaft is REAL HOT to the touch when driving around in the hot weather. AND, as Standby said, the cup holder seems to get MUCH hotter than it should.

I am wondering what some foil backed insulation under the console would do for the problem.

Where you near the Outlet Mall in St. Augustine a couple of Saturday's ago making a "U" turn on Rout 16 to go back toward I-95? If so I was right behind you heading for the Harley dealer.

That was the only fix that has ever been designed and it was for my car, but didn't help at all. Talked to a lawyer today that told me I have a lemon if they refuse to fix it. I'm going to give them another chance and see if under pressure of Lemoning (if that's a word) my 04 would they consider trying to split one of the ducts in the dash and Y it off to send some cool air down the console from the front. I hate to tag this gorgeous lookin vehicle with a lemon.

Got my car back today after being painted for the second time and it looks pretty good, now I have to take it back to have all the over spray removed from all the glass, the top and truck area. What ever happened to QUALITY?

[QUOTE=XLR I FL]CAly: YES mine is a 04. the shifter shaft is REAL HOT to the touch when driving around in the hot weather. AND, as Standby said, the cup holder seems to get MUCH hotter than it should.

I am wondering what some foil backed insulation under the console would do for the problem.

[QUOTE]

CAly: YES mine is a 04. the shifter shaft is REAL HOT to the touch when driving around in the hot weather. AND, as Standby said, the cup holder seems to get MUCH hotter than it should.

I am wondering what some foil backed insulation under the console would do for the problem.

Where you near the Outlet Mall in St. Augustine a couple of Saturday's ago making a "U" turn on Rout 16 to go back toward I-95? If so I was right behind you heading for the Harley dealer. Yes, that was indeed us! I know several Vette owners who have done the insullation thing and it probably helped some, but probably was a poor investment of time and energy. Finding a way to ventilate that tunnel seems like a better approach to me.

I read my technicians write up of my reported console heat problem which is quoted below:

"NOTE: Owner says center console and shifter very hot to touchafter driving."

"TECH COMM: CK CONSOLE TEMP NORMAL OPERATING TEMP."



Now I am somewhat like Standby -- I assume.

WHAT DO I LOOK LIKE A DUMMY??

How can ANYONE check a console temp problem without driving the car first AND further when the car has been sitting for over an hour in the mechanics work space without the engine running.

I WILL BE TAKING THIS UP WITH THEM AGAIN REAL SOON!!!

FYI: ANOTHER TIDBIT-- I found that when the rubber seals were lifted there was RUST on the framework that holds the seal. I showed it to the mechanic that subsequently ordered another part. BUT I wanted you guys to know.

See? What are we to do..............I'll tell you what I'm going to do. I'm going to lemon mine and have already talked with a lawyer. I'm sick of being treated like I have DUMMY stamped on my farhead.

Just got my XLR back from being painted for the second time and the whole cabin, including glass, hood, wheels and trunk had over spray so thick it sounded like sand paper when you ran your hand over it. I called them today and told them I would be in to get this resolved and they told me, it's a three day weekend. I told them it hadn't started yet and I'm coming in so be prepared to resolve this issue.................They did.

I read my technicians write up of my reported console heat problem which is quoted below:

"NOTE: Owner says center console and shifter very hot to touchafter driving."

"TECH COMM: CK CONSOLE TEMP NORMAL OPERATING TEMP."



Now I am somewhat like Standby -- I assume.

WHAT DO I LOOK LIKE A DUMMY??

How can ANYONE check a console temp problem without driving the car first AND further when the car has been sitting for over an hour in the mechanics work space without the engine running.

I WILL BE TAKING THIS UP WITH THEM AGAIN REAL SOON!!!

FYI: ANOTHER TIDBIT-- I found that when the rubber seals were lifted there was RUST on the framework that holds the seal. I showed it to the mechanic that subsequently ordered another part. BUT I wanted you guys to know.

:glol :glol :glol :glol :glol (Good Post jacque! Very pithy.)

At the risk of alienating dog lovers everywhere, I pose the rhetorical question:

What does a dog know? :confused
Beside my famely my dog is my best friend. She's not at ease on bucket seats. And she's got nails that could scratch the hell out of the leather upholstery. Like my chevy pickup Bench seat is a way to go.

Grinding noises stopped when the dealer changed the oil on the rear end, It lasted a week. This afternoon I took my XLR for a ride, and guess what? The noises are back. I thought the quick fix was too good to be true. I think the problem goes deeper than that.

To stop the grinding noise, tell the dealer to add regular oil instead of the GM synthetic. When done, the mechanic should take the car out in an open lot and make a couple figure 8 movemnts so that it can get things foing. If after a few weeks or months the problem returns, then the clutches will have to be changed.

jacqueshar:

I don't agree with XLR Player. But so what.

I suggest you take it back to the dealer and have them change the fluids again ASSUMING you have some more liles on it. PLEASE be sure that they added the Positraction Fluid I indicated in my post. It should show on your ticket.

IF NOT that's your problem. XLR Player would be right in this case since the positraction plates will stick without the additive. They can work the stuff in for you. BUT I wuld leave the problem with them.

GOOD LUCK!!!

Standy: I have a new solution to the HOT CONSOLE.

I am planning on running the car for an hour or so and then pulling into the dealer and asking the technicial to go for a ride with me. While we are moving I am going to have him hold his hand on the shifter shaft and in the drink compartment to see how long it take him to pull it out. HA, HA, HA. My guess is that it won't be very long.

REGARDS.

jacqueshar:

I don't agree with XLR Player. But so what.

I suggest you take it back to the dealer and have them change the fluids again ASSUMING you have some more liles on it. PLEASE be sure that they added the Positraction Fluid I indicated in my post. It should show on your ticket.

IF NOT that's your problem. XLR Player would be right in this case since the positraction plates will stick without the additive. They can work the stuff in for you. BUT I wuld leave the problem with them.

GOOD LUCK!!!
ALL ADDATIVES where added as you indicated on your post. Exact no's etc. I give it few more days before taking it back to the Dealer.
Thanks.

Well that's a great idea, except for the price of gas for running the car for an hour. Actually I have a better idea. Talked to the general manager today and notified him that I would like them to proceed with Lemoning my car and if they don't I will be in touch with a lawyer by Thursday. I know this isn't a popular decision, especially for thosw who haven't anything wrong with their cars, but I have to take the bull by the horns for all the owners that have not been treated very fairly by GM.

Standy: I have a new solution to the HOT CONSOLE. REGARDS.

Go gettem, biteem hard. :jester :flag

Standby,

I drove a $600,000 prototype XLR in early 2003 during a "consumer research" thing. I was one of the last to drive the car, which was being driven all day for this thing. I did not notice any heat then and notice very little heat in my 2004 NM XLR. There were about six of these prototypes (correct me if I'm wrong) and many of them were driven hard coast to coast before release of the 2004 cars.

My point is that they did test (refering to your post in the general category in the thread about the supposed lost leg) the car under quite a few conditions.

I acknowledge the problem but apart from the people here who have mentioned it, it has not been a major problem. Nevertheless, when GM creates a fix, I will want one!

I'm not sure of the language surrounding other states Lemon Laws, however in California your issue must be one that is expressly covered under the warranty and must be an issue that substantially limts the vehicles use, value or safety.

My issue with the XLR was easily handled under both the safety and limited use provisions, since it injured both occupants when the window shattered and the dealership had failed to solve the problem after three attempts.

The center console heat is an entirely different issue. I don't remember seeing anything in the warranty covering the fact you are guaranteed an ambient temperature cupholder. This issue was discussed sometime back (http://www.xlrforum.com/showthread.php?t=592&highlight=console+heat) and at that time results were as mixed as they are now. All of the cars are built the same so I'm not sure how this issue can be mitigated through the Lemon Law.

It will be interesting to subscribe to this thread and others to see if anyone is sucessful in getting GM to buy back their car due to console heat.

Over the years I've owned lots of cars, my Viper GTS would burn you if you were not carefull getting in and out on a hot day, or any day for that matter. Both Corvettes I've owned had center console and trunk heat issues, but not to any real extreme.

Bottom line is the console heat is not something that is a warranty issue since it's not broken. It may be a design issue but it is present in every car to a certain degree (no pun intended) and has not proven to have any significant impact on the cars value nor has it limited its use for anyone here.

Q,

I appreciate your input, but the fact remains that some have problems and some don't and there seems to be a lot more have the problem.
What time of year was this test done. If it wasn't to hot or in the summer, maybe that's the catalyist. Was there a post about a lost leg? I thought it was a burnt leg and a credit card that melted in the cup holder, which I wouldn't doubt one bit. That particular post will be BIG evidence in my case to Lemon this vehicle.
Had you been one of the drivers that drove my 04 back east you might be a little more sympathetic to my woes.
Thanks for the post. I will keep everyone advised as to what happens with this problem.
Bob

Standby,I acknowledge the problem but apart from the people here who have mentioned it, it has not been a major problem. Nevertheless, when GM creates a fix, I will want one!

Thank you very much for sharing your experience. I literally complained for months about the "grinding" noise in the rear end to no avail, when I showed my dealer your correspondence he bluntly told me he doubted that would bring resolve to my problem. You were correct, they were wrong! Thanks again!

This thread has evolved into a mish-mash of issues, thinly,if at all, related.

HOWEVER, I must report that the changing of the differential fluid with the correct additive package for positraction, cured the grinding crackling noise when going into reverse when cold. Dealer knew exactly what I was talking about.

12-10-2004, 04:04 PM #1
XLR I FL
XLR Pit Crew


Join Date: Oct 2003
Location: Florida

Rear End Noise (fyi)

--------------------------------------------------------------------------------

I had been experiencing a noise from my rear end when I was turning (similiar to the plates in a positraction unit sticking) I mentioned this when I went into my dealer yesterday to get an oil change.

They called the factory and were appraised that there was a "new fix" for this condition. It seems that they use;
-- Positraction Additive GM PART # 1052358 (used in other GM models).
-- GM Synthetic Differential Fluid GM PART #89021669.

I have run the car some and it seems to have quieted down some and I expect it to go away after the new fluid and additive get to all of the rear end parts.


I'll let you know what happens over the next few weeks.

--------------------------------------------------------------------------------
Last edited by XLR I FL : 12-12-2004 at 05:02 PM.

Is anyone aware of an actual service bulletin for this fix? We've searched GM Tech Link http://www.gmtechlink.com/images/issues/archive.html and haven't been able to find anything related to it.

Why are we asking? Because we now have the rearend noise when first backing up after the car has been sitting overnight (2005 XLR with 1400 miles) and would like a GM / Cadillac reference if there is one to show the dealer.

Thanks for any help the forum readers may be able to provide.

Best regards,
Ed and Sandra

My 2005 with 5,000 miles is now having the same "grinding/slipping" problem when backing out of the garage in the morning. Sure hope there is a Service Bulletin or Service Advisory on this problem.

Thank you for Reply about the old problem. Was taking care of . But after a week the same problem occurred.

But it is better then it was.

This isn't an XLR issue, it's common to ALL positraction type differentials. Any mechanic worth his (her) salt will know about the proper lubricant.

I brought mine back to the dealer 2 weeks ago and they said the put the additives in there. My grinding comes from making a left turn. The noise sounds like something is grinding. It comes from my right rear tire. The noise is worse when I turn left into a dip. It seems like the dip causes more noise

Have the dealer drain out thd oil wash with a cleaner and but new possy gtease and GM additive anf I will bet money it will go away. I have done with several GM products over te years. Just adding is not enought. Tapjet

They worked on mine 3 months ago, supposedly changed the fluid and added the proper additive.

When our tempurature started south a couple of week ago, the grinding is now back.

Guess I'll have to put up with it.

This is a simple fix if your dealership has qualified people who know what to do. Of course most don't and I know this from going to Dealership's in Austin, Tx and San Antonio Tx and Tucson AZ and then finally in San Diego, where they all changed the fluid and added the additive and within a day to a week it was back in every case. Every dealership said the same thing. We will look at and they all said the same answer. It is just the fluid. Then I met the test engineer from the cadillac roadside team who took me to De La Fuente Cadillac, El Cajon, Ca (A suburb of San Diego) (619) 440-2400. Ask for Jeff the XLR tech and test engineer. He literally told me that all he needed to do was change to a different fluid (Non synthetic and no additive :party ) and it would be perfectly quiet. He was right. Everyone else was full of BS. It has been 10,000 miles since he fixed it and it is perfect.