and sometimes taking corners at speed the car will jerk like the wheel is gonna come off and it can be felt through the steering wheel (the wheel shakes in my hands really bad, visably).


Ok i know what this is because it happened to my jeep it was my rack n pinion for the powersteering i hit a large log quite hard while i was off roading messed it up bad it is located right behind the engin and when i would go around turns in ther jeep it would do the same thing jerk real fast and almost make you loose control and wreck somtimes here i hope this helps
does the engin sound rough when its in park or only when driving?

and the squeeking might be motor mounts but im not sure
a cracked flex plate will make a loud poping/snaping sound at certain rpms

check these links
http://store.yahoo.com/svx-motorspor...svxrapiun.html
http://www.subaruparts.com/diag/?model=2