[BruceWayneClark]

I had to replace the gears inside the motor drive housings. when it makes that
sound, it is the stripping of the nylon or plastic gears inside the housing.
the worm gear has stripped the plastic gear. after replacing the plastic gear, it happened again and i finally went on ebay and found a brass replacement gear and have not had the problem since. replacing those gears are a pain but when you take out the motors, pay attention to which way the mounting bolts go. 1 goes one way and 2 go the other way. if you don't get them right, they will catch on the linkage when you turn on your lights. Very important to clean all the old glue off the gear housing when you take them apart and replace with new 2 part epox. I did mine 3 times to get them right.