just got done putting poly eng.& trans. mnts. in what was suprising to me anyway was that at 19000 mi. (2000 gt never been daily driver but does have 300+ runs on it) both motor mnts. were wasted & trans mnt. just about broken clean thru. dont know if that will help anyone but is worth checking IMO. my car mech. buddies tell me very strange for them to be worn out as they never seem to change any(Im a heavy truck mech. so I never get to change any either,lol)