Popping behind !

Thanks for the reply fellas....my trunk is clean...and as of now it has no exhaust pipe..LOL....and the popping does happen regardless of speed...oh ya...if the car starts to lean in any direction..(ie a curve) ..it makes the same sound....To clarify..the popping sound only happens when the back suspension seems to be compressed under a load...thats why I thought it might have been a lack of rubber in the upper shock mounts..As always thanks for all the help.