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Oldsmobile Aurora, Sedan
#5388 of 5876 Re: Altered front A arms on 500s [rocket3_50]
Nov 04, 2004 (6:21 pm)
This is the info supplied to me by another board member. It should answer your question. If not, let me know. As you can see it originated on the Edmunds Bonneville Board. It is referencing at he tsb on the subject.
#4066 of 4101 Re: GXP Vibration [ravenfive #4063] by desertrat5 Jul 02, 2004 (6:22 pm)
There is a TSB out. Don't know whether it applies to your car or not. I have an '04 SLE and it has the same problem with 17" RSAs and my wife's '00 Ultra has the same problem with Pirellis. Seems to be an inherent feature of the GM full sized 4 door. Here is the TSB.
Bob in Glendale
Document ID# 1455223
2000 Buick LeSabre
Shake/Vibration in Steering Wheel, Floor, Seat at Highway Speeds on
Smooth Roads (Diagnose/Balance Tires/Wheels) #00-03-10-007F - (02/05/2004)
Shake/Vibration in Steering Wheel, Floor, Seat at Highway Speeds on
Smooth Roads (Diagnose/Balance Tires/Wheels)
1998-2004 Buick Park Avenue, Park Avenue Ultra
2000-2004 Buick LeSabre
1998-2004 Cadillac Seville (SLS, STS)
2000-2004 Cadillac DeVille (DTS only)
2001-2003 Oldsmobile Aurora
2000-2004 Pontiac Bonneville (17" Tires only)
This bulletin is being revised to add the 2004 model year and delete the
screened tire program information for all tire manufacturers except for
Continental General. Please discard Corporate Bulletin Number
00-03-10-007E (Section 03 - Suspension).
Some customers may comment on shaking/vibration in the steering wheel,
floor or seat while driving at highway speeds (typically between 60-72
mph (96-115 km/h)) on smooth roads.
These specific vehicles may be sensitive to various rotating mass
assemblies, especially if they are considered to be out-of-balance.
1. Visually inspect the tires and the wheels. Inspect for evidence
of the following conditions and correct as necessary.
* Missing balance weights
* Bent rim flange
* Irregular tire wear
* Incomplete bead seating
* Tire irregularities
* Mud/ice build-up in wheel
* Stones in the tire tread
2. Set the tire pressure to 30 psi (205 kPa) COLD.
3. Road test the vehicle with the Electronic Vibration Analyzer
(EVA) essential tool for a sufficient distance on a known, smooth road
surface to duplicate the condition. Record the Hertz (Hz) reading as
displayed by the EVA onto the tire data worksheet found at the end of
this bulletin. This should be done after a tire break-in period of at
least 10 miles (16 km) at 45 mph (72 km/h) or greater, in order to
eliminate any possible tire flat-spotting.
4. If the road test indicates a shake/vibration still exists, check
the imbalance of each tire/wheel assembly on a known, calibrated,
off-car dynamic balancer. If any assembly calls for more than ¼ ounce on
either rim flange, remove all balance weights and rebalance to as close
to zero as possible.
Some GM dealers may have a Hunter GSP9700 Road Force Balancer.
This will simplify Step 5 by not requiring dial indicators. If a Hunter
GSP9700 machine is available, it may also be used to measure the radial
force of the tire/wheel assembly. A guideline here is 18 lbs or less.
5. While on the balancer, measure wheel runout. If radial or lateral
runout exceeds .020 in (0.50 mm) for aluminum wheels (.030 in (0.76 mm)
for steel wheels), replace the wheel.
6. After confirming wheel balance and wheel runout, if any changes
were made, road test the vehicle again.
7. If the smooth road shake/vibration still exists:
The completed worksheet must be attached to the hard copy
of the repair order.
Record Radial Force Variation readings if you have access
to Hunter GSP9700 Wheel Balance equipment. Use the worksheet found at
the end of this bulletin to record the readings.
* If one or more of the tires have RFV readings in excess of
18 lbs, match mount the tires to get below 18 lbs. Readings of 12 lbs.
or less are preferable for critical customer concerns.
* If the RFV can not be reduced to an acceptable level,
replace the affected tire with one obtained locally.
* The screened tire program is no longer in effect for
Bridgestone/Firestone, Goodyear and Michelin. Low speed screened tires
are available from Continental General only, and only for the Buick LeSabre.
* Road test the vehicle to ensure the shake/vibration has
8. Replace both lower control arms on vehicles built prior to the
following VIN breakpoints. On Aurora, Bonneville, DeVille, Park Avenue,
Park Avenue Ultra and Seville models, a newly developed hydro-bushing
lower control arm with improved damping characteristics has been
released. This control arm is not used on the LeSabre. The new lower
control arms may provide an incremental improvement to the vehicle ride.
Customers who have become "tuned in" to the shake condition may still
feel some shake in the vehicle after the new lower control arms are
installed. Refer to Lower Control Arm Replacement in SI (refer to the
Parts Information table below for SI document ID numbers).
THE CONTROL ARMS SHOULD ONLY BE INSTALLED ON VEHICLES IF, AFTER
THE TIRE AND WHEEL DIAGNOSIS AND REPAIRS HAVE BEEN PERFORMED, THE
VIBRATION CONDITION STILL EXISTS.
Seville (SLS, STS)
DeVille (DTS only)
Lower Control Arm, Left (Aurora, Bonneville, DeVille, Park Avenue, Park
Avenue Ultra, Seville)
Aurora -- 639351
Bonneville -- 657809
DeVille w/FE1, FE3 -- 724856
DeVille w/FE7 -- 724858
Park Avenue, Park Avenue Ultra -- 657760
Seville -- 539332
Nov 05, 2004 (2:16 am)
My service manager followed this procedure for my 03 LeSabre with Michelin Symmetry 16 inch tires.
The force variation of 12 pounds is a maximum if you're a perfectionist about the slight shake.
I have one that was 12, the others were all single digits. I can tell when the 12 is rotated to the front. If you want perfection, get a tire - wheel combo with less than 12. It may mean new tires for two of the rims, assuming new ones will have less uneveness than the ones you already have. That may not be true...
The dealer was putting new tires on a Gran Prix for shake problems. They measured in the high teens and were a name brand same as the original tires (the company used blimps).
Does anyone who why the new A-arms aren't available for LeSabres? Are LeSabre's different in build quality than Park Avenues (they look the same underneath) or the other related cars? Aurora, STS, Deville.
#5390 of 5876 Re: TSB [imidazol97]
Nov 05, 2004 (9:26 pm)
Pretty sure its because the LeSabres use 16" as where the previously listed cars use 17".
Nov 06, 2004 (3:19 am)
What's better, Mobil 1 Synthetic, or Valvoline Synthetic, or do you think they're pretty equal?
Nov 06, 2004 (9:07 am)
Both meet the Covette GM4718 standard for synthetic oils. So, yes I would say they are equally good. I plan to ask my new Cadillac dealer (now a Chevy-Cadillac dealer) to put Mobil one in my Cadillac, since they should keep it on hand for the Corvettes. I considered using it in the 98 Aurora that I had, but the oil monitor called for changes at 3000 to 4000 mile intervals, which would have been expensive. The newer northstars go much further between changes, at least twice a far, so cost is much more reasonable.
#5393 of 5876 Just an observation;
Nov 06, 2004 (2:17 pm)
I have a 97 and an 01 Aurora. The 97 is mine and the 01, which was mine, is now my wife's. I washed both today, and as I was driving up to vacuum hers out, I just noticed how much "tighter" the 97 feels. No rattles at all; surprising for a 8 year old car with 77,000 miles. The 01, on the other hand, with only 34,000 miles, rattles like crazy, mainly from the dashboard area, and the suspension doesn't seem as tight. This is not a criticism, merely an observation. I really like both my Aurora's, just surprised by the difference.
Nov 06, 2004 (4:10 pm)
My 2002 Seville, which is the same wheelbase, seems very tight yet at 28000. But the 01 Aurora may have been a lighter body like the Lesabre/Bonneville, while the Seville is heavier. My 98 Aurora was still tight with a bit over 50,000 on it when I traded.
#5395 of 5876 Re: [sls002]
Nov 07, 2004 (3:37 am)
Why did you trade your Aurora??
#5396 of 5876 synthetic oil
Nov 07, 2004 (5:05 am)
I was reading on the oil boards this morning that switching to synthetic on a higher mileage car , in my case 77,000, is really a waste of money. I tend to disagree. What do you guys think?
#5397 of 5876 Re: synthetic oil [2k1olds]
Nov 07, 2004 (8:14 am)
I don't read the oil boards, so I don't know -- what is the reasoning behind "really a waste of money"? Engine wear doesn't stop at high miles.
I started using Mobil 1 in my V6 Fiero at about 80,000 miles, somewhat concerned about the common advice that oil leaks would develop. None did and the oil-smoke-on-startup problem disappeared (almost all Chevy 2.8L V6s suffer from leaky valve stem oil seals at high miles). With that experience I started using M1 right away when I purchased my '97 Classis at 37,000.