It's been a while since my original post because I wanted to see how it was doing. After a few trips, the front slide has not given me any problems.
My only remedy was to buy an aerosol can of Slide Out Dry Lube and spray the grooved teeth underneath while the slide was extended.
The slide sounds a little better while traveling in and out, and has fully retracted each time since.
Thanks to all who responded.
Bill & Julie & those Havenese pups.
'05 Monaco Diplomat 40DST - Cummins ISL400
Seymour, IN. Our parents lived in the same small town