With a ramp your suspension is still fully loaded! The forces required to shift are way more than you'll generate by pushing and prodding with the weight of the car on the parts.

if you felt lose parts by hands underneath, you'd have continuous clatter all the time. IMO

Suspension noises are a pita.

Have you looked at the thrust arm bushings? usually these show up as judder under braking...so not really a match for your symptoms

GL
A