Just installed poly engine trans and dog bone mounts. Have a few questions about them. Firstly how stiff should these bad boys be because I can't even hook up one of the dog bones she doesn't even budge... Trust me I tied off to a truck and backed up didn't budge. Secondly when I drove her home I expected the rattle and such but now she makes some pretty loud engine noises. Just wondering how other peoples cars reacted to the poly mounts and what I should expect from them noise and vibration wise.