2000 Park ave - power seat problem

The electric adjustment motor has a drive-gear that engages a gear on the shaft of the adjustment screw (90 degree engagement). The gear on the adjustment shaft looses a tooth. Adjustment motor whines, drive gear on adjustment motor spins, no action though because of missing tooth. A 12mm 1/4" drive socket on a wiggler (universal) on the end of a 6" extension can engage the not on the end of the exposed large adjustment shaft and, as the shaft is lightly loaded and the electrical switch engaged, one can get the shaft to spin almost one revolution at a time until the seat is high enough. It is hard to reach the nut necessary (inside the dull-grey clevis that the shaft threads into) and I had to take off the seat pad by removing the 4@ 13mm nuts (and 3 @10mm nuts holding the center section with the driver's cushion) to more-or-less easily access the situation. Dealership wanted well over $1000. to fix it. Three out of my 4 up and down adjustment motors are running, but don't adjust. PS, on my 2001 Park Avenue on each seat there is one adjustment motor for the front edge up and down, one adjustment motor for the rear edge up and down, one adjustment motor for the seat fore and aft, and one adjustment motor for the sear back tilt. Lots of complication, not so much on durability. We do not swap out drivers and adjust the seats excessively. Weak design on the one internal gear. Manually adjust it, unplug the electric to the motor, Drive happy again.

I found a site that told about a new motor from a place called American Science & Surplus it is a very easy swap . I have put 5 motors in my two park avenues. The part is called move. So nice to have working seats now.

To get instructions on how to install brass gears email [email protected]. You might be able to find someone to make the gears for you. You can still email the above address and have instructions on installation sent to you.

I know that this is an old problem. I am working on uploading a possible solution to this problem, and hope to share the video when I have it all done. There is also a guy on the forums that sells brass gears to fix this problem. You could look for his info on google. Hope to have more info up soon.