Are you holding the slide extend/retract button for 5 seconds after the motors stop, if not your motors may be out of synch. Cycle your slide in and out a couple of times, hold the button for 5 seconds after the motors stop, this should resynch your motors. The system counts motor revolutions which is why it's important to hold the button after they stop. If this doesn't fix your problem I'm afraid you're going to have to make a trip to the dealer.
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