Overview
The ZF 4660.276.012 COUPLING is a precision-engineered component designed for the WG 92 and WG 98 transmission series. This OEM genuine part serves as the critical link between the torque converter and the planetary gearset, ensuring smooth power transfer and torsional vibration dampening. The SKU 4660.276.012 is manufactured to ZF’s exacting tolerances, providing a direct replacement that maintains factory-specified driveline integrity. When installed alongside the 4660101017: TRANSMISSION HOUSING, this coupling ensures proper alignment and load distribution within the transmission assembly.
Symptoms of Failure
- Delayed or harsh shifting — A worn 4660.276.012 coupling can cause hesitation between gear changes, particularly under load, as the torque converter fails to engage smoothly with the planetary set.
- Transmission shudder at low speeds — When the coupling splines or damping elements degrade, operators often report a pronounced vibration or shudder during takeoff or when creeping in traffic.
- Metallic grinding noises from the bell housing — Excessive wear on the coupling’s engagement surfaces produces audible grinding or clunking sounds, especially when shifting between forward and reverse.
- Torque converter lock-up failure — A failing coupling prevents proper lock-up engagement, leading to increased transmission fluid temperatures and reduced fuel efficiency in WG 92 series units.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4660.276.012 |
| Material | Hardened alloy steel with nitrided splines |
| Outer Diameter | 178 mm (7.0 in) |
| Inner Diameter | 42 mm (1.65 in) |
| Overall Length | 95 mm (3.74 in) |
| Weight | 1.85 kg (4.08 lbs) |
| OEM Reference | ZF 4660.276.012 (Genuine) |
| Torque Capacity | 2,800 Nm (2,065 ft-lbs) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This coupling is specifically engineered for ZF WG 92 and WG 98 series transmissions. It is a direct fit for models including WG92, WG98, WG180, WG200, and WG210. The 4660.276.012 interfaces directly with the 4660301054: HOUSING II and is secured using the 0631306174: CYLINDRICAL PIN for precise alignment. Always verify the 0769123894: TYPE PLATE on your transmission to confirm model designation before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101017 | TRANSMISSION HOUSING | Main structural casing for gearset and shafts |
| 4660301054 | HOUSING II | Intermediate housing supporting the coupling assembly |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for coupling-to-housing fitment |
| 0769123894 | TYPE PLATE | Identification plate for transmission model verification |
| 0750100022 | SCREW PLUG | Seals hydraulic passages in the housing |
| 4660221029 | SUCTION TUBE | Oil pickup tube for lubrication circuit |
| 0634100317 | O-RING | Static seal between coupling and housing |
| 0636103273 | CAP SCREW | Fastener for securing housing components |
| 0634306311 | O-RING | Hydraulic seal for pressure circuits |
| 4660321029 | FIXING PLATE | Retains coupling axial position within the assembly |
