I recently put ont eh TRW CC627 rear cargo springs on my car and the back of the car still seems to sit a bit low.....i installed these along with a full set of Bilstein shocks. Questions is, is that the correct part number? even when i first sit in the car i can hear them making creaking noises. When driving they kibnd of bang around as well.....they do seems a bit loose in there even when the car is ont eh ground with full weight on the suspension. Would regular rear springs raise it up a bit?