I have a 1998 deville 78000 miles on dry roads its smooth and *** stabile as you could want. On just a slight snow covered road it feels like the rear end is swaying almost to the point of countersteering. it never actually slides but its enough you notice and reduce speed quickly. Any ideas?

 

it sways when you are driving at what speed?
straight or curvy road ?
what kind of tires do you have and how old are they?

 

i have michelins and they're stil abou 80 percent so they still good and they do well in the snow as far as traction. it starts to sway at 40mph and above the faster you go the worse it gets. it does it on straight roads i slow way down for curves because i dont trust itany other questions let me know

 

Are any warning lights or messages on?

 

no warnings nothing in the message center. thats why i cant figure it out. it rides nice no messages tires are good but it acts like it is goin whip around on you.

 

Have rear alignment checked. If toe in is it can get rear of car mind of its own.

 

I havent seen something like this in 20 years. but i did run into a set of tires where the tire ply (s) separated and the car would start driving as if it was riding in muddy clay. Tire dealer swapped the tires and the problem was over.

Not sure this is possibly in today's modern radials, but your description sure sounds like it except for one thing .. mine did it on dry & wet roads.

 

i had something similar happen to me on my other car, my rear sway bar links broke, and it was like driving on marbles in the rear, not sure if these cars have rear sway bar links, do they?

 

A lot of good points made.

The car is 10 years old, snow, salt, corrosion?
From the description, at this point, it does not sound like it is a safe car to drive.

I be having the car on a lift and then visually check the suspension for damage, corrosion, alignment, lose parts, etc.

 

hey guys got her fixed. the toe was 3/4 inch in from what it should be we aligned it and all is fine. thanks for the help