Overview
The ZF 4616.128.007 CONNECTING PARTS component is a critical structural link within the WG65 transmission series. This OEM genuine part serves as the intermediary coupling element that secures the output shaft assembly to the transmission housing, ensuring precise alignment under high-torque conditions. The SKU 4616.128.007 is engineered to absorb torsional vibrations while maintaining rigid axial positioning, directly influencing shift quality and drivetrain longevity. Without this connecting part, the internal gear train cannot maintain its calibrated clearances, leading to premature wear on adjacent assemblies.
Symptoms of Failure
When the ZF 4616.128.007 connecting part degrades, operators typically notice these specific failure modes:
- Oil seepage at the output interface: A worn connecting part allows transmission fluid to bypass the seal, creating visible drips near the OUTPUT FLANGE junction.
- Intermittent gear slippage under load: Loss of clamping force causes the OUTPUT shaft to momentarily disengage during acceleration.
- Abnormal metallic rattling: Loose fitment generates a distinct chatter at low RPM, often mistaken for bearing failure.
- Driveline vibration at highway speeds: Misalignment from a fatigued connecting part transfers harmonic oscillations through the TRANSMISSION HOUSING.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4616.128.007 |
| Material | High-tensile alloy steel (42CrMo4) |
| Surface Treatment | Zinc-nickel plating (240h salt spray resistance) |
| Weight | 1.84 kg (4.06 lbs) |
| Overall Length | 127.5 mm |
| Bolt Hole Pattern | 6x M12 on 85 mm PCD |
| OEM Reference | ZF 4616.128.007 |
| Torque Spec | 120 Nm + 90° angle (final pass) |
Compatibility
This connecting part is specifically validated for the ZF WG65 series, but engineering cross-references confirm fitment across these models: WG65, WG80, WG120, WG150, WG180, and WG200 transmissions. The 4616.128.007 interfaces directly with the HEXAGON SCREW fasteners that secure the output assembly. Always verify that the OUTPUT FLANGE mating surface is free of burrs before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105402 | OUTPUT | Transfers rotational force from planetary gears |
| 4005303005 | OUTPUT FLANGE | Connects driveshaft to transmission output |
| 4616101119 | TRANSMISSION HOUSING | Encloses gear train and supports bearings |
| 0636011038 | HEXAGON SCREW | Secures connecting part to output shaft |
| 0636011118 | HEXAGON SCREW | Mounts housing cover plate |
| 0636016015 | HEXAGON SCREW | Fastens output flange to drum |
| 0631306085 | CYLINDRICAL PIN | Aligns connecting part during assembly |
| 0634313118 | O-RING | Prevents fluid leakage at joint |
| 0636304019 | SCREW PLUG | Seals oil gallery access port |
| 0634801152 | SEALING RING | Provides static seal under bolt head |
