Installed Bilstein 24-185240 4600 series shocks with OME 948's. These were the shocks for a 2000 Dodge dakota ext. cab 4x4. Extended these shocks were 2 inches longer than the old Rusty's shocks. The Rusty's were were 2 inches longer than the stock ones. Problem is after installing them the rear of the Liberty bounces like there are no shocks on it at all. If I push up and down on the rear bumper then stop it will bounce 2 or 3 more times then stop. Is that normal with the Bilsteins?