Overview
The ZF 4616.102.044 INPUT for WG65 is a critical OEM genuine component engineered to transfer rotational force from the torque converter directly into the planetary gearset of your ZF transmission. Positioned at the front of the main housing, this input shaft assembly ensures smooth power delivery and precise gear engagement under heavy loads. The SKU 4616.102.044 is precision-machined to factory tolerances, guaranteeing a direct replacement without modification. When paired with a properly sealed TRANSMISSION HOUSING, this part maintains the structural integrity required for demanding industrial applications.
Symptoms of Failure
When the 4616.102.044 input shaft begins to wear, operators often notice persistent oil leaks around the front seal area, a clear sign that the shaft surface has become scored. Another common failure symptom is gear slipping under load or during acceleration, which indicates that the splines are no longer engaging the clutch packs correctly. You may also experience abnormal vibration or whining noise from the bell housing, particularly when shifting between forward and reverse. Finally, difficulty engaging gears or a delayed shift response can point to excessive wear on the input shaft bearing journals.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4616.102.044 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 245 mm (estimated) |
| Spline Diameter | 32 mm (estimated) |
| Weight | 2.8 kg (estimated) |
| OEM Reference | ZF 4616.102.044 |
| Surface Treatment | Nitrided for wear resistance |
Compatibility
This genuine ZF 4616.102.044 INPUT is specifically designed for the WG 65 Series transmission family. Based on its spline geometry and shaft length, it is also compatible with the WG180, WG200, and WG250 models that share the same input architecture. Always verify that the OUTPUT shaft and OUTPUT FLANGE are in good condition during installation, as worn mating parts can accelerate wear on the new input. Secure the assembly using the correct HEXAGON SCREW torque specifications to prevent loosening under high torque loads.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers power from the gearset to the driveline |
| 4616203017 | OUTPUT FLANGE | Connects the output shaft to the driveshaft |
| 4616101117 | TRANSMISSION HOUSING | Encloses and supports all internal components |
| 0636011038 | HEXAGON SCREW | Secures the input shaft bearing retainer |
| 0636016015 | HEXAGON SCREW | Fastens the output flange to the shaft |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals the input shaft bore against leaks |
| 0732611049 | FILTER INSERT | Traps debris in the hydraulic circuit |
| 0634303718 | O-RING | Seals the output flange connection |
| 0636610082 | STUD | Provides threaded mounting for the bell housing |
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