Overview
The ZF 4660.305.022 BUSH is a precision-engineered wear component designed for the WG 92 Series transmission family. This OEM genuine part functions as a critical bearing surface within the gear train assembly, reducing friction between rotating shafts and stationary housing elements. The bushing absorbs radial loads and maintains precise shaft alignment during high-torque operations. The SKU 4660.305.022 is manufactured to ZF’s exacting tolerances, ensuring consistent oil film distribution and thermal stability under heavy-duty cycles. When installed correctly, this bushing directly supports the longevity of the 4660101012: TRANSMISSION HOUSING and the 4660301020: HOUSING, forming a sealed assembly that prevents contamination ingress.
Symptoms of Failure
- Transmission oil leaks around the shaft seal area – A worn 4660.305.022 bushing creates excessive clearance, allowing pressurized fluid to bypass the seal and drip from the housing joint.
- Gear slipping under load with audible whining noise – Degraded bushing material causes shaft wobble, leading to intermittent gear engagement and a high-pitched metallic sound during acceleration.
- Increased operating temperature and metallic debris in oil – As the bushing surface erodes, bronze or steel particles contaminate the lubricant, accelerating wear on the 0631306174: CYLINDRICAL PIN and adjacent components.
- Vibration in neutral or at idle – Loss of bushing concentricity permits shaft oscillation, transmitting vibration through the transmission case and into the driveline.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4660.305.022 |
| Material | Phosphor bronze (SAE 841) |
| Inner Diameter | 38.10 mm (1.500 in) |
| Outer Diameter | 44.45 mm (1.750 in) |
| Length | 25.40 mm (1.000 in) |
| Weight | 0.045 kg (0.099 lb) |
| OEM Reference | ZF 4660.305.022 |
| Hardness | 60-80 HRB |
Compatibility
This bushing is engineered for the ZF WG 92 Series, including models WG92, WG120, WG150, WG180, and WG200. It is a direct replacement for the OEM bushing found in the output shaft support area of these transmissions. The 4660.305.022 interfaces with the 4660101804: TRANSMISSION HOUSING and the 4660301008: HOUSING in later production runs. Always verify the bushing bore condition in the housing before installation. The 0769123894: TYPE PLATE on your transmission will confirm the exact series designation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101012 | TRANSMISSION HOUSING | Main structural casing for gear and shaft assembly |
| 4660301020 | HOUSING | Secondary housing for clutch and valve body support |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for precise housing registration |
| 0769123894 | TYPE PLATE | Identification tag with transmission model and serial number |
| 4660221012 | SUCTION TUBE | Oil pickup tube for pump inlet |
| 0634100317 | O-RING | Static seal for fluid passages |
| 0636103273 | CAP SCREW | Fastener for housing retention |
| 0750100022 | SCREW PLUG | Port closure for test or drain access |
| 4660101804 | TRANSMISSION HOUSING | Alternate housing variant for WG200 series |
| 4660301008 | HOUSING | Compact housing for WG92/120 models |
