To find the correct motor for your landing gear on your 2006 Coachmen Somerset 358 5th wheel you will need to check the motor for its part number. We have the Lippert Components Tuson High Speed 5th Wheel RV Landing Gear Motor # LC141893, Replacement Motor for Stromberg Carlson Electric Landing Gear # LG-142178 and Lippert HD 6500-lbTuson 5th Wheel RV Landing Gear Motor # LC196308. The part number in the manufacturer label will help to identify the correct motor. If you have a different... view full answer...