For your 2004 Forest River Sandpiper 27RLSS, if your slide out is a through frame, you will want the Replacement 18:1 Tuson Motor for Lippert Through-Frame Slide-outs # LC125802.
If you need more than just the motor, we have the Lippert Components 18:1 Venture Actuator Slide-Out Motor # LC132682. view full answer...