Nooo... don't do all that just yet.
First step.. check your engine mounts. Get under the car and see if they still look hunky dory.
I had squeekies, and I was really really sure it was one of the suspension bushes... so off I went replacing them all. First I did the swaybar ones... nope, didn't fix it. Then I did the lower suspension arm bushes... nope, didn't fix it. Then I got the upper bushes replaced... nope, didn't fix it. Got a lower ball joint done at the same time which was dodgy... nope, didn't fix it.
After these were all done, I decided to "rock" the suspension a bit to see where the noise was. So what i did was I parked it on fairly level ground, had the handbrake off and the car in park... and rocked the wheel back and forth. *Squeek Squeek Squeek* came the noises, and it was clearly in the engine bay. Still can't see the engine mount because there is a big intake manifold in the way(MPFI) so i figure the cross member must have come loose or something... because how rocking a wheel backwards and forwards when it's a engine mount is stuffed was beyond me.
Anyways it came time for changing my 3 speed Auto to the new 4 speed. I jack the car up and have a look. The engine mount had basically turned to powder and the engine was now rubbing against the metal engine mount part.
Sometimes it's the last thing you expect that turns out to be the answer. I dont mind having spent time and money doing the bushes on my car, cos they were stuffed anyway and I have asmooth ride now :-D