ZF 4699.303.235 SLOTTED NUT | OEM Genuine Part

Overview

The ZF 4699.303.235 SLOTTED NUT is a precision-engineered fastening component designed for critical retention within ZF heavy-duty powershift transmissions. This OEM genuine part secures bearing assemblies and gear clusters on the main shaft, preventing axial movement that could lead to drivetrain misalignment. As a slotted nut, it works in conjunction with a cotter pin or locking tab to ensure vibration-proof locking under extreme torque loads. The SKU 4699.303.235 is specifically machined to ZF’s exacting tolerances for construction machinery applications, making it a direct replacement for worn or damaged factory-installed hardware.

Symptoms of Failure

When the ZF 4699.303.235 slotted nut loses its locking integrity, operators may notice gear slipping under load during excavation or grading operations. A second common symptom is unusual transmission whining or clunking from the main shaft area, indicating bearing preload has been lost. Technicians often report metal debris in the transmission oil filter as the nut’s threads gall against the shaft. Finally, intermittent loss of forward or reverse drive can occur when the nut backs off far enough to allow gear disengagement.

Technical Specifications

Compatibility

This slotted nut is a standard retention component across multiple ZF transmission families used in construction machinery. It is commonly found in the WG180, WG200, and WG210 series powershift transmissions. The part also appears in the 4WG200 and 5WG200 variants used in wheel loaders and dozers. For proper installation, always verify the nut mates with the correct shaft shoulder and that the 0636104255 CAP SCREW securing the locking plate is torqued to factory specifications.

Related Components

During a full transmission rebuild, the slotted nut is typically replaced alongside the 4699101159 HOUSING and 4699301254 HOUSING to ensure proper shaft alignment. The 4699298049 HOUSING KIT provides all necessary gaskets and seals, while the 4699309123 HOUSING COVER protects the bearing cavity from contamination.