ZF 4699.298.025 GEAR SHAFT for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4699.298.025 GEAR SHAFT is a critical torque-transfer component within the WG100, WG130, and WG131 transmission assemblies. This OEM genuine part serves as the primary interface between the input drive and the planetary gear sets, ensuring precise rotational alignment and load distribution. The SKU 4699.298.025 is engineered to ZF’s original metallurgical and dimensional standards, directly replacing worn shafts to restore factory gear mesh geometry. This gear shaft sits centrally in the transmission housing, supported by bearings and sealed by the adjacent 4699101136 HOUSING and 4699301218 HOUSING components.

Symptoms of Failure

• Gear slippage under load: A worn gear shaft loses its spline engagement, causing intermittent power loss during acceleration or hill climbs.
• Metallic grinding noises from the transmission: Excessive play in the shaft leads to tooth-on-tooth contact, producing a distinct grinding sound when shifting.
• Oil leaks near the shaft seal area: Shaft wear damages the sealing surface, allowing transmission fluid to escape past the 0634801038 SEALING RING.
• Vibration in neutral or drive: Imbalanced shaft rotation causes harmonic vibrations felt through the chassis, often misdiagnosed as bearing failure.

Technical Specifications

Compatibility

This gear shaft is specifically designed for ZF’s WG-series transmissions, including the WG100, WG130, and WG131 models. It also fits select variants of the WG180 and WG200 series where the shaft length and spline configuration match. Always verify the housing bore dimensions using the 4699309114 HOUSING COVER as a reference point. The shaft is secured in place using the 0636101411 CAP SCREW, which must be torqued to factory specifications during installation.

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