Well if your blend door is not operating smoothly changing a motor is only going to mask the root issue. Have you removed the motor and manually moved the blend door to check for binding or sticking spots?
BTW: you do not have an L494 if it is a 2008. What model do you really have so this can get moved to the correct forum? You have a choice of L320 Sport or L322 full size.
BTW: you do not have an L494 if it is a 2008. What model do you really have so this can get moved to the correct forum? You have a choice of L320 Sport or L322 full size.