Keep your RV slide-out running straight and true. The Lippert 259084 Drive Shaft Collar Support is an OEM-spec replacement component designed to hold the slide-out drive shaft in proper alignment within Lippert rack-and-pinion slide systems. If your shaft is walking, binding, or producing unusual noise during slide operation, a worn or broken collar support is often the culprit -- and this is the correct factory replacement part to fix it.
Lippert rack-and-pinion slide-out systems use a driven shaft that spans the underside of the slide room, transferring torque from the motor to the rack gears on each side. The drive shaft collar support brackets that shaft at key points along its length, preventing flex, vibration, and lateral movement during extension and retraction cycles.
Over time -- especially in rigs that see frequent slide cycling, rough roads, or corrosive environments -- these collar supports can crack, deform, or loosen, allowing the shaft to drift. Even minor misalignment accelerates wear on the rack, pinion gears, and motor components. Replacing a failed collar support promptly is far less costly than addressing downstream drivetrain damage.
Direct factory replacement under part number 259084 -- no modification or fabrication required for compatible systems.
Holds the rack-and-pinion drive shaft in correct radial and axial position throughout full slide travel.
Proper shaft support limits lateral load on gears and motor, extending the service life of the entire slide system.
Designed to bolt into the existing mounting location, making this a straightforward DIY or shop repair.
Lippert rack-and-pinion slide-out systems -- found across a wide range of travel trailers, fifth wheels, and motorhomes -- use a horizontal drive shaft that is supported at multiple points along its span. The collar support clamps around or captures the shaft at one of these support points, typically attached to the slide room floor frame or the main chassis cross-member. It is distinct from the end bearing, the motor mount, and the gear assembly itself.
Replacement is typically performed with the slide room fully retracted and the RV on level ground with wheel chocks in place. The old collar support is unbolted from its mounting location, the drive shaft is dropped or supported, the new collar is positioned and secured, and mounting fasteners are torqued to spec. No special tools are generally required beyond basic hand tools.