Overview
The ZF 4616.329.012 BUSH for WG65 is a precision-engineered wear component designed to maintain correct shaft alignment and reduce friction within the transmission housing. Positioned as a critical bearing surface in the WG 65 Series gearbox, this OEM genuine part ensures smooth rotational movement and prevents metal-on-metal contact between rotating shafts and stationary housings. The SKU 4616.329.012 is manufactured to ZF’s exacting tolerances, making it essential for long-term drivetrain reliability in heavy-duty commercial vehicles.
Symptoms of Failure
- Transmission oil leaks around the shaft seal area — When the 4616.329.012 bushing wears, it allows excessive shaft play, breaking the seal integrity and causing fluid seepage.
- Gear engagement hesitation or slipping under load — A worn bushing introduces lateral movement in the gear train, leading to delayed shifts and power loss during acceleration.
- Abnormal low-frequency humming or grinding noises — As the bushing surface degrades, metallic contact generates a distinct rumble that intensifies with road speed.
- Increased vibration through the shift lever or chassis — Worn bushings fail to dampen torsional vibrations, transmitting harshness directly to the operator cabin.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4616.329.012 |
| Material | Phosphor bronze with PTFE lining |
| Inner Diameter | 32.0 mm |
| Outer Diameter | 38.0 mm |
| Length | 25.0 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 4616.329.012 |
| Hardness | 80-90 Shore D |
Compatibility
This bushing is specifically engineered for the ZF WG 65 Series transmission family. It is a direct fit for models including the WG180, WG200, WG210, and WG250 gearboxes. The 4616.329.012 is also used in certain WG65 variants found in municipal buses, refuse trucks, and heavy-duty construction equipment. Always verify your transmission serial number before ordering.
During installation, this bushing interfaces directly with the TRANSMISSION HOUSING (4616101059) and is secured using HEXAGON SCREW (0636011038), HEXAGON SCREW (0636011118), and HEXAGON SCREW (0636016015). Proper torque sequencing of these fasteners is critical to prevent bushing distortion and premature failure.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | TRANSMISSION HOUSING | Encloses and supports all internal gear train components |
| 0636011038 | HEXAGON SCREW | Secures housing cover to main casing |
| 0636011118 | HEXAGON SCREW | Fastens bearing retainer plate |
| 0636016015 | HEXAGON SCREW | Mounts auxiliary drive flange |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals oil passage between housing sections |
| 0636304019 | SCREW PLUG | Closes inspection port in housing |
| 0634801152 | SEALING RING | Prevents fluid escape at plug interface |
| 0732611049 | FILTER INSERT | Captures debris in lubrication circuit |
| 0634303718 | O-RING | Gaskets filter housing to transmission body |
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