ZF 5840.303.362 GEAR SHIFT FORK for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 5840.303.362 GEAR SHIFT FORK is a precision-machined actuation component engineered for the WG100, WG130, and WG131 heavy-duty transmission series. This OEM genuine part directly engages the sliding sleeves on the main shaft, translating driver input into precise gear selection. Positioned within the upper case assembly, the shift fork rides on a selector rail and interfaces with the synchronizer hub to lock or release gear sets. The SKU 5840.303.362 is manufactured to ZF’s original metallurgical standards, ensuring minimal play and consistent engagement under high-torque conditions. When paired with a properly functioning 0750117075 TAPER ROLLER BEARING, the fork maintains axial alignment critical for smooth shifting.

Symptoms of Failure

• Hard shifting or gear clash: A worn fork pad or bent fork arm prevents full synchronizer engagement, causing grinding noises when attempting to shift into second or third gear.
• Transmission jumps out of gear: Excessive clearance between the fork and the shift collar allows the gear to disengage under load, particularly during deceleration on downhill grades.
• Metallic debris in transmission oil: Flaking of the hardened fork surface contaminates the lubricant, often visible as silver particles during drain intervals. This can accelerate wear on the 5838109007 DIFFERENTIAL assembly.
• Stiff or notchy shift lever feel: Corrosion or galling on the fork’s rail bore creates binding, requiring excessive effort to move the shift lever through the gate pattern.

Technical Specifications

Compatibility

This shift fork is specifically validated for ZF WG-series transmissions with a 6-speed countershaft layout. Primary applications include the WG100, WG130, and WG131 models found in medium-duty trucks and construction equipment. It is also compatible with the WG180 and WG200 variants when used in the 3rd/4th gear position, though rail length verification is recommended. The fork interfaces directly with the 0631329086 SPRING PIN that secures it to the shift rail. For complete driveline restoration, inspect the 2095209019 DIFFERENTIAL for matching wear patterns.

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