Power Seat movement jamming at the end of its travel or rocks back and forth:

Symptom: 993 seats with powered front/rear movement jam when the seat is moved all the way to the furthest back position. 

Pictured below on the left is the worn rubber rear bushing stop.  It is worn to about half the thickness of the front bushing stop pictured on the right. This is probably due to the bushings drying out over time, where the rear stop sees much more use than the front stop. Worn stops can cause the seat to twist on its mounting rails when it hits the stop, jamming it at the rearmost end of its travel.

Repairing the rear stop involves replacing the worn rubber bushing with a rubber grommet and two nylon washers:

Repairing power seats that seem to rock back and forth:

Seat Drive Repair Kit

Failed and now missing drive bushing.

The nylon bushings in the seat drive mechanism have failed. When they fail, they fall out and cause play in the cable control mechanism. Repair kits for this can be found on Amazon or eBay. Seats that do not have a motorized forward/backward positioning function do not exhibit this issue.

Here are some documents that may be helpful when servicing the seats in a 993:

Seat Parts Catalog:

https://993servicerepair.blogspot.com/2020/07/993-parts-catalogs-also-seats-wheels.html

Seat removal and installation:
https://993servicerepair.blogspot.com/2020/07/how-to-remove-front-seat-without-drama.html

This topic originated on the Pelican Parts website, authored by user "boosfix".

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