Lately I've been feeling a shudder at freeway speeds. It happens mostly between 60-75 mph. Once I get above 80 mph it seems to slow down or stop. It feels almost like a shift but my RPMs stay the same. It varies in harshness and frequency. Sometime it will happen once in a couple of miles, other times it will happen 5 or more times in a row. So far the MIL light has not come on.
A short history of the week leading up to it: I got a flat tire and drove home less than 10 miles on the spare in city traffic not going much faster than 35-40mph. I drove on my studded winter tires for 4 days while I waited for a shaved down tire from TireRack. I didn't notice anything with my studded tires but the ride isn't as smooth as my summer tires. I also installed a Primitive rear differential protector using the stock mounting bolts. I have since taken the rear protector off and the problem continues.
The car is a 2002 Outback Sedan with the H6 and VDC. Approximately 122k on the clock.
Thank you for any help.
-Tim
A short history of the week leading up to it: I got a flat tire and drove home less than 10 miles on the spare in city traffic not going much faster than 35-40mph. I drove on my studded winter tires for 4 days while I waited for a shaved down tire from TireRack. I didn't notice anything with my studded tires but the ride isn't as smooth as my summer tires. I also installed a Primitive rear differential protector using the stock mounting bolts. I have since taken the rear protector off and the problem continues.
The car is a 2002 Outback Sedan with the H6 and VDC. Approximately 122k on the clock.
Thank you for any help.
-Tim