Spare tire issues

pdm07@optonline.net · 04-21-2008, 06:29 PM

Today i had a flat on my rear right tire and had to put on the donut spare. After installing the spare i heard a distinct whine in the drive train and some shifting resistance. I drove the car home and do not plan on driving the car until i have installed my summer tires. Is this due to a tire height discrepency? Any advise

Pete McLean

***wdb*** · 04-25-2008, 04:54 AM

All cars with fulltime AWD are sensitive to tire circumference. Subaru has a limit for difference in circumference in the owner's manual. If the spare is considerably larger or smaller than the other tire on the same axle, this can cause binding of the differential on that axle, and noises will result. Drive it long enough and you will cause damage. So you're smart to park it!

04-21-2008, 06:29 PM	#1
pdm07@optonline.net Lurker Car: Blue '04 wrx sti Posts: 7 Join Date: Aug 2007 Trader Rating: (0)	Spare tire issues Today i had a flat on my rear right tire and had to put on the donut spare. After installing the spare i heard a distinct whine in the drive train and some shifting resistance. I drove the car home and do not plan on driving the car until i have installed my summer tires. Is this due to a tire height discrepency? Any advise Pete McLean This ad is not endorsed by this member. Please register or login to hide this ad.

04-25-2008, 04:54 AM	#2
*wdb* dances with roads Posts: 4,972 Join Date: Apr 2005 Trader Rating: (8)	Re: Spare tire issues All cars with fulltime AWD are sensitive to tire circumference. Subaru has a limit for difference in circumference in the owner's manual. If the spare is considerably larger or smaller than the other tire on the same axle, this can cause binding of the differential on that axle, and noises will result. Drive it long enough and you will cause damage. So you're smart to park it! This ad is not endorsed by this member. Please register or login to hide this ad.