ZF 4644.308.543 IDLER GEAR for WG200 | OEM Genuine Part

Overview

The ZF 4644.308.543 IDLER GEAR is a critical component within the WG 200 series transmission, serving as a torque-distributing intermediary between the input shaft and the planetary gear sets. This OEM genuine part ensures smooth power flow and load sharing across the gear train, directly influencing shift quality and overall driveline efficiency. The SKU 4644.308.543 is precision-machined to maintain exact tooth engagement, reducing vibration and wear in high-torque applications. When installed alongside the 4644105475: DISCONNECTION assembly and the 4642303097: OUTPUT FLANGE, this idler gear forms the core of the power transfer module.

Symptoms of Failure

• Whining or growling noise during acceleration: Worn teeth on the 4644.308.543 produce a distinct metallic sound, especially under load, indicating gear surface fatigue.
• Intermittent gear slippage or delayed engagement: As the idler gear loses its precise tooth profile, the transmission may hesitate or slip when shifting between forward and reverse.
• Metallic debris in transmission fluid: Flaking or pitting on the gear surface contaminates the oil, often visible during routine fluid changes as fine silver particles.
• Vibration through the shift lever or chassis: Uneven wear on the idler gear creates rotational imbalance, transmitting noticeable shuddering through the drivetrain.

Technical Specifications

Compatibility

This idler gear is primarily designed for the ZF WG 200 series transmissions, including the WG200, WG210, and WG220 variants. It also fits select WG180 models where the idler shaft configuration matches the 28 mm bore specification. The gear interfaces directly with the 4644101134: TRANSMISSION HOUSING and is secured using the 0636020211: HEXAGON SCREW for proper axial retention. Always verify the tooth count and shaft diameter against your transmission’s service manual before installation.

Related Components