Heavy Duty Knuckle Ball Wiper Seal System
Upgrade the sealing system on your Toyota solid front axle with the Sky’s Offroad Design Heavy Duty Knuckle Ball Wiper Seal System.
What's Included
Includes components for both sides of the front axle:
- 2 × Ultra High Durometer Polyurethane knuckle ball wiper seals
- 4 × Heavy-duty 1/8" steel C-ring retainers
- 2 × Oil-seal spacer rings
- 16 × Hex-head cap screws
- Captive flat and lock washers
- Corrosion-resistant coated components
Factory-style Toyota knuckle wiper seals are a common maintenance item on older solid-axle trucks. Once the sealing system deteriorates, grease and contamination can begin working their way around the knuckle ball. A greasy buildup or leakage around the inside of the front wheel is one of the most obvious signs that the knuckle seals need attention.
Sky’s system replaces the traditional sealing arrangement with a heavy-duty design built around Ultra High Durometer Polyurethane wiper seals, heavy steel retainers, corrosion-resistant components, and installation-friendly captive hardware.
Heavy Duty Polyurethane Wiper Seals
The heart of the SKY-137301 system is our Ultra High Durometer Polyurethane knuckle ball wiper seal.
These seals are designed to provide improved sealing and substantially longer service life compared with the traditional Toyota-style mesh/felt sealing arrangement.
Each seal is molded with the SKY-137301 part number directly into the component for easy identification.
Heavy Duty 1/8" Steel C-Ring Retainers
The oil-seal retaining C-rings are formed from 1/8-inch-thick steel, providing a strong and rigid retaining surface for the upgraded wiper seals.
The retainers feature a durable black E-coat finish to help resist corrosion, rust, and finish deterioration during long-term service.
Spacer Rings
The system includes precision oil-seal spacer rings designed to work with the upgraded wiper and retaining system.
The spacer rings feature a silver-zinc corrosion-resistant finish for long-lasting service in the demanding environment around the steering knuckle.
Captive-Washer Hardware
Included are 16 hex-head cap screws with captive flat and lock washers.
The captive washer design keeps the hardware together during installation, eliminating the frustration of handling and potentially losing individual small washers while working around the axle housing.
Hardware features a silver-zinc corrosion-resistant finish for extended service life.
- 1979-1985 Toyota Pickup 4WD
- 1984-1985 Toyota 4Runner 4WD
- 1976-1990 Toyota Land Cruiser
