Well if your sea View is like mine and you are talking about the dinning area slide it only has 1 motor that connects the two gears. On mine I sometimes have the bolt on the front tube that turns the gear break. it's a round rod that goes into a square tube. The rod that runs from the motor to the front is the only thing that ties the two gears together so they both run out at the same time. It's possible you have skipped a tooth or two on the cogged rail that the gear turns you. You can see the rail and gears when you open the storage bays. Try releasing the motor brake and pushing the slide all the way in then resetting the brake. The brake is the lever that sticks up on the side of the motor.
John & Carol Life members 01 31'Sea View single slide, F53 V-10 with 134,000 miles and counting. 2012 Jeep Liberty Smi brake system Security by Bentley God Bless