i have 2002 ford ka 1.3...last few weeks noticed creaking and squeaking noises at the left rear passenger side....especially over bumps and when car is on side roads going slow...my mechanic checked my car and it appears both rear suspension bushes were deteriorating badly and for 90.00 were both replaced. i drove away from garage and noticed the creaking noise had not stopped so my mechanic wants me to bring car in to look further into this....worried about what next and cost..want some idea what they would be looking at next and has anyone had similar problems.