shudder

2009 9-5 Aero auto trans 35K miles stock no mods When accelerating lightly no shudder When accelerating moderately I am getting a shudder from the front end of the car that I can feel through the floorboards. Note this is not when the trans is shifting. I do not notice turbo gauge pressure...

My 9-5 V-6 has been leaking coolant for a couple weeks. It doesn't leak all the time, only occasionally and mostly only when it is off. It is leaking high in the center against the firewall. Any ideas? Will post photos soon. Also, often times when I start up from a stop or slow roll I...