Overview
The ZF 4651.364.027 PLATE is a precision-engineered component designed for the WG 100 Series transmission family. This OEM genuine part functions as a critical wear surface within the clutch pack assembly, ensuring consistent hydraulic pressure distribution and torque transfer during gear engagement. The SKU 4651.364.027 is manufactured to ZF’s exacting tolerances, providing a direct replacement that maintains factory-specified clearance between rotating elements. Located in the transmission’s valve body or planetary gear set, this plate prevents metal-on-metal contact and stabilizes oil flow under high-load conditions.
Symptoms of Failure
- Delayed or harsh shifting – A worn 4651.364.027 plate causes irregular clutch pack engagement, leading to noticeable lag or jarring shifts during acceleration.
- Low transmission oil pressure – Degraded plate surfaces allow fluid bypass, triggering pressure drops that result in gear slipping under load.
- Metallic debris in oil pan – As the plate erodes, fine metal particles contaminate the transmission fluid, often visible during routine drain intervals.
- Overheating transmission – Excessive friction from a failing plate generates abnormal heat, which may trigger warning lights or burnt fluid odor.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4651.364.027 |
| Material | Hardened steel with anti-friction coating |
| Outer Diameter | 165 mm (estimated) |
| Inner Diameter | 95 mm (estimated) |
| Thickness | 2.5 mm (estimated) |
| Weight | 0.45 kg (estimated) |
| OEM Reference | ZF 4651.364.027 |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
Compatibility
This plate is engineered for the ZF WG 100 Series, including models such as WG180, WG200, and WG210. It also fits select variants of the WG150 and WG250 transmissions used in medium-duty commercial vehicles and off-highway equipment. Always verify your transmission’s serial number against the OEM parts catalog before installation.
During replacement, inspect the TRANSMISSION HOUSING (4651101006) for cracks or warping, as misalignment accelerates plate wear. The HOUSING (4651301034) and HOUSING (4651301013) must be clean of debris to ensure proper plate seating. Always replace the O-RING (0634303928) during reassembly to prevent fluid leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101006 | TRANSMISSION HOUSING | Encloses gear train and supports shaft alignment |
| 4651301034 | HOUSING | Holds clutch pack and valve body components |
| 0634303928 | O-RING | Seals fluid passages between housing sections |
| 4651301013 | HOUSING | Provides mounting surface for planetary gears |
| 4651301015 | SCREEN SHEET | Filters debris from hydraulic fluid flow |
| 4651301035 | SCREEN SHEET | Secondary filtration for high-pressure circuits |
| 0630361028 | SEALING CAP | Prevents contamination of unused ports |
| 4475280060 | SCREW PLUG | Secures fluid channels during assembly |
| 0634303312 | O-RING | Provides seal for pressure test points |
| 0630361063 | SEALING CAP | Protects threaded openings from debris |
