Originally Posted by gnat

To be fair yours does have half of it's system removed so it's not really a C4 anymore

I hadn't really thought of that before. Since you can't really turn PSM completely off in a C4, what happens to PSM in the RWD conversions? Does it get flakier because it can't make the front wheels do anything or is it smart enough to figure it out? Without the front drive shaft does turning PSM off truly turn it off or is it still partially enabled?

Originally Posted by 5CHN3LL

Yes, my C4 is currently a C2 - but I have not driven it in the slush since the conversion. Since the amount of power going to the front wheels is minimal unless the rear wheels are slipping, removing the FWD stuff doesn't have as much an impact as you think it would - but it sure does make the car more fun to drive.

Interestingly, PSM is far less twitchy without the front wheel drive components.

Originally Posted by BoxheadTim

To partially conclude the saga - had the alignment checked and redone at the local Porsche specialist. They found that the driver's side rear wheel had slight toe out instead of the required toe-in. Re-setting the alignment to factory specs made the car noticably more stable even on dry roads, and the drive home last night in a snow storm (first snow since the work) showed that the worrying instability from the back end has gone, too.