The direct OEM-style replacement gearbox for Kwikee electric steps. If your steps are grinding, stalling, or failing to extend and retract smoothly, the B linkage gearbox is one of the most common wear items -- and this heavy-duty zinc-plated steel unit brings your steps back to full operation without replacing the entire step assembly.
Kwikee electric steps rely on a motor-driven gearbox to rotate the linkage that pushes steps out and pulls them back in. The "B" designation refers to the curved linkage gearbox configuration used across several of Kwikee's most popular step series. When the gearbox wears out -- often from years of road vibration, corrosion, or overloading -- the entire step mechanism loses its drive and your steps stop responding.
Lippert part number 379161 is a direct replacement unit. It cross-references to Kwikee part 1101426 and is also sold under AM Equipment part number 110-1029. The fully enclosed housing protects the internal gears from road debris, moisture, and corrosion so the replacement is built to outlast the part it replaces.
Fully sealed gearbox housing keeps out road debris, water, and road salt to protect internal components from premature wear.
Curved "B" linkage design rotates to extend and retract the step treads -- the correct geometry for series 28, 31, 37, and 39 step assemblies.
Heavy-duty steel construction with corrosion-resistant zinc plating stands up to the underbody environment of an RV or towable.
Comes with two washers for installation. No need to source hardware separately to complete the swap.
This gearbox is engineered specifically for the following Kwikee electric step series:
If you are unsure of your step series, check the label on the step motor housing or the underside of the step frame. The series number is typically stamped or printed there. You can also cross-reference your existing gearbox part number against Kwikee 1101426 or AM Equipment 110-1029 to confirm compatibility before ordering.
Replacing the B linkage gearbox is a straightforward repair that most RV owners can complete with basic hand tools. The gearbox mounts to the step motor and frame, with the curved linkage arm connecting to the step tread mechanism. The two included washers seat the gearbox correctly at the mounting points.
Kwikee electric step gearboxes typically wear out due to one or more of the following conditions: