ZF 4699.298.045 RING GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4699.298.045 RING GEAR is a critical internal component engineered for the WG100, WG130, and WG131 series transmissions. This OEM genuine part functions as the primary torque-transfer interface within the planetary gear set, meshing directly with the sun gear and planet gears to facilitate smooth ratio changes under heavy load. As a high-stress component, the 4699.298.045 ring gear must maintain precise tooth geometry to prevent drivetrain shudder. In a typical rebuild, this ring gear is installed alongside the 4699101136 HOUSING and the 4699301218 HOUSING, which together form the structural backbone of the gear train assembly.

Symptoms of Failure

• Audible gear whine during acceleration: A high-pitched, cyclical noise that intensifies under load indicates tooth face wear or pitting on the ring gear. This is a common long-tail search query for “ZF transmission whining noise when accelerating.”
• Intermittent gear slipping under torque: If the ring gear teeth have suffered spalling or chipping, the transmission may momentarily lose power transfer, particularly in lower gears. This symptom is often searched as “WG100 transmission slipping in first gear.”
• Metallic debris in transmission fluid: Flakes or silver-colored particles found during an oil change point directly to ring gear degradation. Technicians frequently search for “metal shavings in ZF transmission fluid” to diagnose this failure mode.
• Hard shifting or delayed engagement: Worn ring gear teeth can cause binding in the planetary carrier, leading to abrupt shifts or a noticeable lag when selecting Drive or Reverse.

Technical Specifications

Compatibility

This ring gear is specifically designed for the ZF WG100, WG130, and WG131 transmission models. It is also compatible with certain variants of the WG180 and WG200 series that share the same planetary gear architecture. When replacing this component, always verify the tooth profile matches your existing sun gear. The assembly requires the 4699309114 HOUSING COVER to seal the gear cavity, and the 0636101411 CAP SCREW is used to secure the housing cover to the main case. For proper alignment, the 0631302072 CYLINDRICAL PIN ensures precise dowel positioning during reassembly.

Related Components