Did you get your input shaft replaced by ZZP? I just brought my car to another shop, drove 4 1/2 hrs to get here. After taking it apart, apparently my 300M input shaft is missing a piece inside. I am being told it's a manufacturer's defect.. I emailed them last night to see if they will replace it, since I've had it for a year and a half on a car I haven't been able to drive/resolve. There was a member nearby who has let me use their input shaft (same one) in the meantime, but I need to replace it... Worried ZZP is going to stick me with buying another one. I decided to take this new revelation as a reason to inform them of the past half dozen products I've purchased that have almost blown my engine.. This was the final nail in the coffin, time to speak my mind!
