Jimkana
5/3/2008 9:50:19 AM
Hello,
I picked up my 02 STS used with about 60k miles, it always seemed to have a tire shake. The dealer was a friend and his guys went over and over this car replacing and rebalancing etc but still it shook.
Finally we all agreed it must be the tires (lots of complaints on the internet concerning the Goodyears on it seemed to back that theory...)
So we drove it that way for about 25k miles.
Lately the Goodyears just wouldn't keep air for more than a couple days without popping warnings... and they made a kind of "squishing" sound at low speed... and the ride was deteriorating...These Goodyear's were not all that worn but they looked/sounded awful and there was that shaking at speed.
As a result I put a new set of Michelin's on it to the tune of about $1k.
The ride changed dramatically... It rides/handles like new...
EXCEPT:
On the way home it started to shake at about 63mph so after just one day I took it back and had all four tires rebalanced... and rotated... Although the shake seemed to "change" in quality it is still there.
So here I am: 2 different sets of pretty expensive tires, at least 4-5 balances done between them and lots of eyballs all over the car yet I still have this shake...
It really takes away from the enjoyment of driving this beautiful car...
I do also have an RSS code C0620 Right Front Position Sensor malfunction, but that only started recently after I had some work done under the hood...
Any ideas?
Thanks.
Jim
hdryder05
11/19/2008 9:45:49 AM
Jim, I''ve too had this issue since purchasing my 05 Deville. I''ve since replaced the tires with Goddyear Assurance. Notably the right rear seems to be where the shake (past about 68mph) comes from, so the wheel was removed and found to be out of round. The tire was replaced and still the shake continued, only this time it seemed to now consume not only the passenger seat but the front dash and steering wheel as well. I even went so far as to buy a new "true" wheel and place it on that right rear side which offered a dampening but still a shake. I''m really at my witts end here. One mech suggested that one or both front drive shafts could have run out or have a bad "CV" joint. Has ANYONE a bit of advice or suggestions or had the same problem as us? Could it possibly be the same thing? It''s depressing to own a cadillac and have it ride like a Geo. Thanks, Kevin
carnut
11/19/2008 1:40:16 PM
Most Cadillac dealers will have a book that is a gathering of all bulletins from a couple of years. Bulletins, unlike recalls, are "in the field" reported repairs for things like this. I have one for my 91 Allante separate from the factory service manual. It covers all Cadillac bulletins from 90 to 91. Get friendly with the service advisor to be able to read the book.
rickyd
11/20/2008 8:54:07 AM
i too have the same with my ''''99 sts.... almost a mirror to your story...... and too have spent big $$ to try to correct...... at this point i have learned to live with it. i will say that there are times that it is not there (the shimmy) and times it is. mine starts at 66 mph, and seems to go away at 77 mph..... you know i might add that it seems more like a vibration, in that if it were front end problem i should feel it in the steering wheel, and if problem were rear i should feel it in the seat......
my arms are still up in the air on this one....??????? so hopin maybe someone might have some answers.........
wheel bearing??? i really havent had these checked. maybe that will be next.....
please, lets keep the forum posted on this one.........
rickyd
also need to mention.... the vibration is more pronounced when i give er a little gas in that cruising speed, 66 to 77 mph. and seems to go away when i am off gas.........
