Overview
The ZF 4616.102.048 INPUT for WG65 is a critical OEM genuine component engineered to transfer rotational force from the torque converter directly into the planetary gearset of the WG 65 Series transmission. Positioned at the front of the main shaft assembly, this input shaft absorbs high-torque loads during every shift cycle and ensures precise alignment with the clutch packs. The SKU 4616.102.048 is manufactured to ZF’s original specifications, guaranteeing exact fitment and metallurgical integrity for heavy-duty industrial applications. When paired with a robust TRANSMISSION HOUSING, this input component maintains the structural rigidity required for sustained operation under maximum load.
Symptoms of Failure
- Delayed engagement or gear slipping under load: A worn input shaft spline can cause intermittent power loss, especially when climbing grades or hauling heavy payloads.
- Metallic grinding noise from the bell housing area: As the bearing journal wears, the input shaft may contact the HOUSING, producing a distinct grinding sound during acceleration or deceleration.
- Transmission fluid leaks near the front seal: Surface wear on the input shaft’s sealing surface allows ATF to bypass the seal, leading to low fluid levels and eventual overheating.
- Vibration through the driveline at highway speeds: Eccentric wear on the input shaft causes imbalance, transmitting harmonic vibrations that accelerate wear on downstream components.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4616.102.048 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 285 mm |
| Spline Diameter | 48 mm (10-spline) |
| Bearing Journal Diameter | 55 mm |
| Weight | 4.2 kg |
| OEM Reference | ZF 4616.102.048 |
| Surface Hardness | 58-62 HRC |
Compatibility
This input shaft is specifically designed for the ZF WG 65 Series transmission family, including models WG65, WG80, WG100, WG120, WG150, WG180, and WG200. It is also compatible with select ZF Ecomat 4HP and 5HP variants that share the same input spline geometry. For proper installation, always replace the HEXAGON SCREW and inspect the HOUSING for wear. The 4616.102.048 interfaces directly with the torque converter hub and the forward clutch drum, making it a central component in any WG65 rebuild or overhaul.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101111 | TRANSMISSION HOUSING | Encloses and supports the gear train assembly |
| 0636011118 | HEXAGON SCREW | Secures the input shaft bearing retainer |
| 4616301304 | HOUSING | Intermediate housing for clutch pack alignment |
| 4616301309 | HOUSING | Rear housing section for output shaft support |
| 0636011038 | HEXAGON SCREW | Fastener for valve body mounting |
| 0636016015 | HEXAGON SCREW | High-tensile bolt for housing flange |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing positioning |
| 0634313118 | O-RING | Seals hydraulic passages between housings |
| 0636304019 | SCREW PLUG | Closes oil gallery access ports |
| 0634801152 | SEALING RING | Prevents fluid leakage at shaft exits |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
