ZF 4660.203.013 HELICAL GEAR for WG200/WG92 | OEM Genuine Part

Genuine ZF HELICAL GEAR (Part No. 4660.203.013). This part fits: 6 WG 200(555/3), WG 92, WG 92 S 4. Found in: Output. Also referenced as: 4660203013 / 4660.203.013 / 4660 203 013.

Overview

The ZF 4660.203.013 HELICAL GEAR is a critical power-transfer component engineered for the WG200 and WG92 series transmissions. This OEM genuine part is responsible for meshing with adjacent gear sets to reduce noise and vibration while transmitting torque through the drivetrain. Positioned within the intermediate shaft assembly, the helical gear ensures smooth engagement and consistent load distribution across the gear train. The SKU 4660.203.013 is precision-machined to ZF factory tolerances, making it a direct replacement for worn units in heavy-duty commercial and industrial applications.

Symptoms of Failure

  • Whining or howling noise during acceleration: A worn helical gear produces a distinct high-pitched whine that intensifies under load, indicating tooth surface pitting or misalignment.
  • Intermittent gear slippage under heavy torque: As the gear teeth wear unevenly, the transmission may momentarily lose engagement, causing a brief loss of power delivery.
  • Metallic debris in transmission fluid: Flaking or chipped gear teeth shed fine metal particles into the oil, often visible during routine fluid changes or when inspecting the SUCTION TUBE for contamination.
  • Vibration through the shift lever or chassis: Excessive gear backlash from a worn helical gear transmits harmonic vibrations that can be felt in the cab or vehicle frame.

Technical Specifications

Parameter Specification
Part Number 4660.203.013
Gear Type Helical, Right-Hand
Module 4.5 mm
Number of Teeth 37
Helix Angle 22.5°
Material Case-Hardened Alloy Steel (20MnCr5)
Hardness 58–62 HRC
Weight 1.85 kg
OEM Reference ZF 4660.203.013

Compatibility

This helical gear is designed for ZF WG200 and WG92 series transmissions, including the WG180, WG200, and WG92 variants. It is commonly used in bus, coach, and heavy-truck applications where the transmission is paired with engines producing up to 2,000 Nm of torque. The gear interfaces directly with the TRANSMISSION HOUSING and the HOUSING assembly, and it works in conjunction with the PERIPHERALS kit and the RANGE SELECTOR for proper gear engagement. Always verify your transmission model and serial number before ordering.

Related Components

Part Number Name Function
4660198001 PERIPHERALS Seal and gasket kit for transmission assembly
0501209818 RANGE SELECTOR Controls gear range shifting mechanism
4660101011 TRANSMISSION HOUSING Main structural casing for gear train
4660301018 HOUSING Rear housing section for output shaft
0631306174 CYLINDRICAL PIN Alignment pin for housing assembly
0769123894 TYPE PLATE Identification plate with transmission specs
4660221012 SUCTION TUBE Oil pickup tube for lubrication system
0634100317 O-RING Seal for fluid connections
0636103273 CAP SCREW Fastener for housing cover
0750100022 SCREW PLUG Drain or fill plug for transmission

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Transmission Fitment

ZF 6 WG 200(555/3), ZF WG 92, ZF WG 92 S 4

Section

Output