Does your rear end groan?
#2
Could it be the brakes when the transmission kicks in to either gear? I know mine like to move just a bit when I shift into either reverse or drive and it makes the "groan-like" sound. Just thought I would offer the insight...
#4
#5
I second this thought.. mine does make a groan from the brakes if I am on a slight hill....
LOL ..especially If I have forgotten to release the parking brake