The car feels unstable at rear
02-14-2007, 08:53 PM
#16
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Originally Posted by cobra06
There were some issues with loose sway bars ( if we were talking about dry ground) that caused instability issues, easily fixed, I think with longer or different bolts, and the obvious tightening.
Originally Posted by NNH
I agree. The issue clearly relates to a loose nut.
Found a tread about almost the same problem at renntech.org, but they had the wobbling even in dry condition. They link the problem to a TSB from Porsche. The TSB goes like this
"MY2005 - 911 Carrera (997)/911 Carrera S (997)/911 Cabriolet (997)/911 Cabriolet S (997)
Rattling noise caused by the stabilizer.
On above-mentioned vehicles, the hexagon nut on the threaded connection for the stabilizer/connecting link can become loose on the front or rear axle due to loss of preload. This leads to rattling noises from the area of the front and/or rear stabilizer.
Therefore, connecting links with a fastening bolt thread extended by 10 mm and an appropriately extended hexagon nut need to be installed on the front and rear axle as of the introduction date listed below.
In the event of a customer complaint, the previously installed connecting links must to be replaced on all four wheel suspensions by connecting links with the fastening bolt thread extended by 10 mm and be secured with the new extended hexagon nut.
Date of Introduction: April 25, 2005 as of the following VIN’s (there are some isolated vehicles before the 4-25-05 date)
995S 717623 911 Carrera (997)
995S 742406 911 Carrera S (997)
995S 755776 911 Cabriolet (997)
995S 765718 911 Cabriolet S (997)"
Rattling noise caused by the stabilizer.
On above-mentioned vehicles, the hexagon nut on the threaded connection for the stabilizer/connecting link can become loose on the front or rear axle due to loss of preload. This leads to rattling noises from the area of the front and/or rear stabilizer.
Therefore, connecting links with a fastening bolt thread extended by 10 mm and an appropriately extended hexagon nut need to be installed on the front and rear axle as of the introduction date listed below.
In the event of a customer complaint, the previously installed connecting links must to be replaced on all four wheel suspensions by connecting links with the fastening bolt thread extended by 10 mm and be secured with the new extended hexagon nut.
Date of Introduction: April 25, 2005 as of the following VIN’s (there are some isolated vehicles before the 4-25-05 date)
995S 717623 911 Carrera (997)
995S 742406 911 Carrera S (997)
995S 755776 911 Cabriolet (997)
995S 765718 911 Cabriolet S (997)"
02-15-2007, 01:55 AM
#17
If you're just lightly on the throttle, does this still occur? If you're on the throttle when this happens, I'm thinking it might be the open rear diff using the brakes to transfer power from left to right due to limited traction. My 330i used to feel this way in the snow sometimes, even with snowtires. (I don't have a 997 though so I can't speak from experience, but one day I'll get one which is why I've been following this board.)
02-15-2007, 09:33 AM
#19
Originally Posted by mishref
Rear-Engine.
Rear-Wheel Driver.
300+ hp.
If its not sliding .. then you might have a problem.
Rear-Wheel Driver.
300+ hp.
If its not sliding .. then you might have a problem.
02-15-2007, 09:56 AM
#20
Burning Brakes
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Absolutely correct.
My new 295/30-R19 Pirelli 240 SnowSports ("V" rated) freaked me out for the first 200 miles... but after a a couple of 4 wheel burnouts on dry pavement, they're good to go... <g>
My new 295/30-R19 Pirelli 240 SnowSports ("V" rated) freaked me out for the first 200 miles... but after a a couple of 4 wheel burnouts on dry pavement, they're good to go... <g>
02-15-2007, 11:46 AM
#23
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Originally Posted by kauai_diver
Same here, plus I get light-headed when the engine is on and I stick my nose and mouth in the exhaust and breathe heavily.
02-15-2007, 01:14 PM
#24
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Originally Posted by ChipAZ
We could start having Rallies in Blizzards. The Annual Lake Effect Run from Buffalo to Cleveland.
02-15-2007, 02:30 PM
#25
Originally Posted by frafoss
I experience this wobbling at the rear, not on dry surface, but on snow and ice. I can drive in 60 mph and the rear is going from side to side all the time and I have to adjust with the steering wheel all the time. I am driving MS tyres, Dunlop wintersport M3, 225/40/18 and 265/35/18.
It doesn't affect me so much, but I wonder if it affects the handling in dry and on track.
It doesn't affect me so much, but I wonder if it affects the handling in dry and on track.
02-15-2007, 07:58 PM
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Originally Posted by Moderato
Doesn't having the weight of the engine over the tires give the 911 more traction for the rear wheels, not less? I understand that the car has a "pendulum" effect when driving fast but if you're going 60mph in a straight line on snow, I would think the rear engine would help traction for a RWD.
02-17-2007, 01:17 AM
#29
WTF are you doing driving a Porsche on snow/ice/salt???? My 997 GT3 came home 1/13/07, and hasn't been started since then, save for needing to move the car to allow me to clean our driveway with our tractor/snowblower!
Please! Wait until good weather arrives, You will be amply rewarded!
Please! Wait until good weather arrives, You will be amply rewarded!
02-17-2007, 09:26 AM
#30
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Originally Posted by frafoss
I experience this wobbling at the rear, not on dry surface, but on snow and ice. I can drive in 60 mph and the rear is going from side to side all the time and I have to adjust with the steering wheel all the time.
