A direct-replacement gear pack for Lippert 2.5 x 2.5 above-floor and through-frame electric slide-out systems. Ships pre-assembled and ready to install -- no bench assembly needed. If your slide-out is grinding, slipping, or failing to extend and retract smoothly, this is the service part that restores full function.
The Lippert 123356 gear pack assembly is engineered specifically for the 2.5 x 2.5 inch rack-and-pinion through-frame and above-floor slide-out systems found on a wide range of towable and motorized RVs. Worn or stripped gear teeth are one of the most common causes of slide-out failure, and replacing the full gear pack restores the mechanical drive without requiring a complete motor or actuator replacement.
This unit arrives fully assembled. Install it as a drop-in replacement -- no pressing, no staking, and no special tooling required beyond standard hand tools. At approximately 5 lbs., it is easy to handle during an overhead or under-chassis installation.
Arrives ready to install. No gear pressing or sub-assembly work required on the bench or under the coach.
Correct tooth count for units manufactured October 2013 and later. Earlier units require an 18-tooth gear -- see compatibility note below.
Designed specifically for Lippert 2.5 x 2.5 above-floor and through-frame slide-out drive systems.
Matches Keystone RV replacement part number 336853, making sourcing and warranty documentation straightforward.
Lippert updated the gear specification for 2.5 x 2.5 slide-out systems in October 2013. Verify your build date before ordering:
Mixing tooth counts will result in improper mesh, accelerated wear, and potential slide-out failure. Check the unit's build date plate, typically located on the A-frame or door jamb, before ordering.
While every RV installation varies, the 123356 gear pack is serviced by removing the slide-out motor or drive head, extracting the worn gear pack from the housing, and seating the replacement pack in the same orientation. Confirm the drive shaft engagement before reinstalling the motor. Grease the gear teeth per Lippert's standard slide-out service procedure using a lithium or NLGI-2 grease.