Transmission flaring from a stop?

[Strand]

Hi all,

On my current trip to New Hampshire, I begun observing some transmission behavior that's given me some cause for concern. I've searched around the forums to the best of my ability, but can't find something that matches my problem.

The 300D has begun revving up from a dead stop. She crawls forward for a second or two under higher RPM until the gear "catches", then we're on our way as per usual. In particularly bad instances, this hesitation comes with a brief shudder as the car finds the gear.

To me, it seems like the car is partially losing forward gear every time I come to a complete stop. It still idles forward, but doesn't seem to be entirely "in gear" under initial acceleration. However, the rest of the gears work fine (up shift, downshift, kickdown, reverse).

Any ideas? Any help would be much appreciated.