i have a 97 pontiac gran prix with a 144,000 miles. i had new struts put on at 100,000 miles. now at 144,000 there is a loud boom every now and then from the front end suspension. i put new strut mounts on and it made no change. all the bushings in the a frames look ok. and the car doesent trac to the left or right either and i dont feel anything in the steering wheel. i just spent $65 to find out that it isnt the strut mounts. what are the other possibilities?