Restore your RV slide-out to full operation with the correct OEM-spec gear set for Lippert Venture 28:1 motors. This kit supplies the three internal components most often damaged by wear or sudden overload -- the 2nd reduction gear, the clutch assembly, and the drive pin -- so you can rebuild the gearbox without replacing the entire motor unit.
When a Lippert Venture slide-out motor starts grinding, slipping, or failing to extend and retract the room, the gearbox internals are often the culprit. Replacing worn gears and a fatigued clutch assembly is a straightforward repair that saves the cost and labor of swapping out the complete motor assembly.
Part number 191073 (manufacturer reference 8599-11) is the correct replacement gear set for the 28:1 reduction gearbox used in Lippert's Venture slide-out system. The 28:1 ratio gearbox is widely used across a broad range of production RVs that specify Lippert Venture rack-and-pinion or through-frame slide mechanisms.
Direct OEM-spec replacement gear for the second stage of the 28:1 reduction train. Restores proper torque multiplication and smooth operation.
Integrated slip-clutch assembly protects the gearbox from overload. Replacing a worn clutch eliminates slipping under load without rebuilding the whole motor.
5/16 in. drive pin included in the kit -- a small part that is frequently lost during teardown and is required for final reassembly.
This kit contains only the three internal gear components. The motor body, housing, and output shaft are not part of this set and must be reused or sourced separately.
The 28:1 designation refers to the gear reduction ratio between the motor's input shaft and the final output shaft that drives the slide-out mechanism. A 28:1 ratio provides high torque output from a compact 12V DC motor, which is needed to push and pull heavy slide rooms under varying conditions including uphill grades, uneven terrain, and wind loading.
Lippert uses this specific ratio in the Venture series to balance extension/retraction speed with the torque required for typical residential and destination-trailer slide rooms. If the gearbox ratio is incorrect, the slide may move too slowly, fail to generate enough force, or strip out under load.
The gear ratio is typically stamped or labeled on the gearbox housing of the Venture motor. If the label is missing, you can also verify the ratio by cross-referencing your slide-out system's original build sheet, the RV manufacturer's parts list, or the Lippert service documentation for your chassis or floor plan year.
Manufacturer reference number 8599-11 is the internal Lippert engineering reference for this gear set and can be used to confirm fitment with Lippert's technical support line or a dealer parts counter.
This is an intermediate-level repair suitable for an experienced DIYer or RV technician comfortable with disassembling small gearbox housings. Basic hand tools and a clean work surface are required. Key tips for a successful repair: