2005 Grand Caravan with power driver seat. The front motor that makes the front of the seat go up and down seems to have stripped it's gears. You can hear ir running / clicking but seat doesn't move up / down in the front. All other motors / axis seem to function normal. Did tap on the sleeve the worm gear goes into and then it will turn a rotation and stop again. Worm gear is lubed, and not gummy.
Can just this motor be replaced or does the whole seat pan need to be changed?

Thanks!

Bob