Overview
The ZF 4661.102.014 INPUT for WG94 is a critical OEM genuine component engineered for the input shaft assembly of ZF’s WG 94 Series transmissions. This part serves as the primary torque-transfer interface between the engine and the transmission’s planetary gearset, absorbing rotational forces and ensuring smooth power delivery under heavy-duty conditions. The SKU 4661.102.014 is precision-machined to factory tolerances, making it a direct replacement for worn or damaged input units in WG94 applications. When installed alongside a properly functioning 6073003014: CONTROL UNIT, this input component ensures consistent hydraulic pressure modulation and shift timing.
Symptoms of Failure
- Delayed or harsh engagement – When the 4661.102.014 input wears, you may notice a pronounced lag or clunk when shifting from neutral to drive or reverse, often accompanied by vibration.
- Torque converter shudder – A worn input can cause intermittent slipping or shuddering under load, especially during low-speed maneuvers or hill climbs.
- Transmission fluid contamination – Metal particles from a failing input shaft can circulate through the system, leading to clogged filters and degraded performance in the 4656183202: LOOSE PARTS kit.
- Oil leaks near the bell housing – Degraded seals around the input area often result in visible fluid seepage, requiring immediate inspection of the 4661101033: HOUSING and 4661301096: HOUSING components.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4661.102.014 |
| OEM Reference | ZF 4661.102.014 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 2.85 kg (6.28 lbs) |
| Input Spline Count | 24 (internal) |
| Overall Length | 187 mm |
| Max Torque Capacity | 1,200 Nm |
| Seal Diameter | 65 mm |
Compatibility
This OEM genuine input is specifically designed for the WG 94 Series of ZF transmissions, which includes the following models: WG180, WG200, WG210, and WG240. It is also compatible with select variants of the WG94 and WG98 series used in medium-duty trucks, buses, and off-highway equipment. Always verify your transmission’s serial number against the ZF parts catalog to confirm fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656183202 | LOOSE PARTS | Kit containing seals, rings, and small hardware for input assembly |
| 6073003014 | CONTROL UNIT | Electro-hydraulic module managing shift pressure and timing |
| 4661101033 | HOUSING | Front transmission housing supporting input shaft bearings |
| 4661301096 | HOUSING | Rear housing section enclosing planetary gearset |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for housing-to-input shaft positioning |
| 0769123894 | TYPE PLATE | Identification plate with transmission model and serial number |
| 0750100022 | SCREW PLUG | M18 drain/fill plug for transmission fluid pan |
| 4660201008 | SCREW PLUG | M22 plug for pressure test port on control unit |
| 0636100117 | SCREW PLUG | M14 plug for oil cooler line port |
| 0501211384 | VALVE | Pressure relief valve for torque converter circuit |
