Overview
The ZF 4661.201.002 TAPER ROLLER BEARING is a critical OEM genuine component engineered for the WG 90, WG 92, WG 94, WG 98, and WG 200 series transmissions. This precision bearing supports radial and axial loads within the planetary gear set, ensuring smooth torque transfer and minimizing internal friction. Installed directly in the output shaft assembly, the SKU 4661.201.002 maintains correct gear alignment and reduces wear on adjacent components. When paired with the 4660198001 PERIPHERALS kit, it forms the backbone of a reliable drivetrain rebuild.
Symptoms of Failure
- Whining or grinding noise during gear engagement: A worn taper roller bearing produces a distinct metallic sound, especially under load or when shifting between forward and reverse.
- Excessive axial play in the output shaft: As the bearing races degrade, you may notice noticeable end-play, leading to misalignment and premature wear of the 0501209818 RANGE SELECTOR mechanism.
- Oil contamination with metallic debris: Flaking or spalling of the bearing surfaces introduces fine metal particles into the transmission fluid, often visible during routine oil changes.
- Intermittent gear slipping or harsh shifting: Loss of bearing preload can cause erratic clutch pack engagement, mimicking hydraulic issues.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4661.201.002 |
| Type | Taper Roller Bearing (Single Row) |
| Bore Diameter | 45 mm (estimated) |
| Outer Diameter | 85 mm (estimated) |
| Width | 23 mm (estimated) |
| Material | Case-hardened steel (DIN 1.3505) |
| Weight | 0.62 kg (1.37 lbs) |
| OEM Reference | ZF 4661.201.002 |
| Dynamic Load Rating | 78 kN (estimated) |
Compatibility
This taper roller bearing is a direct replacement for ZF WG 180, WG 200, WG 90, WG 92, WG 94, and WG 98 series transmissions. It fits both standard and heavy-duty variants, including models with integrated retarders. The bearing interfaces directly with the 4660101011 TRANSMISSION HOUSING and the 4660301018 HOUSING assembly, making it essential for any full overhaul. Always verify your transmission serial number against the ZF parts catalog before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | Peripherals | Seals, gaskets, and hardware for transmission assembly |
| 0501209818 | Range Selector | Controls gear range engagement |
| 4660101011 | Transmission Housing | Main structural casing for gear train |
| 4660301018 | Housing | Rear or intermediate housing section |
| 0631306174 | Cylindrical Pin | Alignment dowel for housing assembly |
| 0769123894 | Type Plate | Identification label for transmission model |
| 4660221012 | Suction Tube | Oil pickup tube for lubrication system |
| 0634100317 | O-Ring | Seal between housing and cover |
| 0636103273 | Cap Screw | Fastener for bearing retainer |
| 0750100022 | Screw Plug | Drain or fill port closure |
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