Could you drive a 2003 Subaru Forester with P215 55 R16 tires and be okay the oem is P215 60 r16?
If you are asking about rolling diameter so you keep the speedometer right, that sounds close. I run 235/55-16 on mine. See the related link for a calculator to compare tire sizes. Keep in mind that wider tires need wider rims otherwise you run the risk or ruining your new tires quickly and never achieving the performance you were seeking.
What might be the cause of a howling noise at or above 35 miles per hour it is not changed by shifting gears but sounds like it is coming from the center of the truck or the wheels?
There are several possibilities: the tires could be worn or have deep "lugs". If the tires have worn with "cupping" they could be making noise. If it isn't the tires, it could be the drive shaft or the drive-shaft carrier bearing if it's a 2-piece drive shaft. Another possibility is the differential. If the noise only happens when accelerating or decelerating it could be the differential ring/pinion gear alignment or wear to the ring/pinion gear.
If it is shaking while you are driving, it could be a number of things. Because subarus are all wheel drive, having different sized tires on the front and back will make the car shake, as well as ruin your transmition. It could also be a wheel bearing. The rack and pinion may have to be replaced. Also, check to see if your CV joints are in good condition. You may even have to have…
Should front tires spin when the vehicle is jacked up high enough that the tires no longer touch the ground?
I have been driving my 98 legacy L (300k miles) for several months in fwd because a mismatch in rear tire diameter from different aged tires of the same spec caused parking lot grabbing in tight turns. Runs smoothly now. Can I drive like this year round except for the snowy season? Several friends want to do the same with similar subaru awd wagons, but are newer and with less miles than me.