Keep your slide-out moving smoothly with the correct OEM-standard gear rack. The Lippert 137170 is the standard gear rack used in most Lippert dual arm above floor slide-out systems -- a direct replacement that restores proper engagement between the drive motor and the slide mechanism without modification.
Lippert above floor slide-out systems use a rack-and-pinion drive arrangement where a motor-driven gear engages a toothed rack mounted to the slide room assembly. When the rack wears, chips, or breaks -- usually after years of use or following a misalignment event -- the slide may move unevenly, skip, or fail to extend and retract entirely.
Part number 137170 is the standard replacement rack for the dual arm above floor system. Sourcing the correct part number matters here: Lippert produces several rack variants for different slide system generations, and using the wrong rack pitch or length will cause improper gear engagement and accelerated wear.
Matches the original rack spec used in most Lippert dual arm above floor slide-out systems. No machining or modification required for compatible applications.
Toothed rack engages the motor pinion gear to convert rotary motor output into linear slide room travel -- the core mechanism of Lippert above floor systems.
Designed for Lippert dual arm above floor configurations where two drive arms work in tandem to extend and retract the slide room evenly.
Replaces a worn, stripped, or damaged gear rack without requiring replacement of the full slide drive assembly, saving significant labor and cost.
Lippert above floor slide-out systems mount the drive mechanism above the RV floor level, making them more accessible for service than under-floor or in-wall systems. The dual arm version uses two synchronized drive arms -- each riding on a gear rack -- to push and pull the slide room. Because both arms must stay in sync, it is strongly recommended to inspect both racks when replacing one. Unequal wear between racks can cause the slide room to rack (twist) during travel.
Replacing the gear rack on a Lippert above floor slide typically involves removing the slide room trim, accessing the drive arm assembly, unbolting the old rack, and mounting the replacement in the same position. Correct alignment of the rack relative to the pinion gear is critical -- the gear should mesh at the proper depth with no binding and no excessive backlash.