On a cold start up like when I am leaving to go to work I will start my 03 svt and let it run til the rpms slow down. Just recently even after that when I put it in reverse it feels like something is binding up or vibrating a whole bunch. Also when going in 1st to 3rd gear after startup it does the same thing and even when downshifting it will do it. I’ve went through and replaced the whole front suspension control arms and the axles. Still there. It just hit 100000 miles and it’s my only transportation.