Overview
The ZF 0501.214.037 INNER CLUTCH DISK is a critical friction component engineered for the WG158 and WG200 series transmissions. This OEM genuine part sits within the clutch pack assembly, where it transfers torque between rotating elements during gear engagement. As a wear item, it directly influences shift quality and overall driveline efficiency. The SKU 0501.214.037 is precision-machined to ZF’s original tolerances, ensuring seamless integration with the TRANSMISSION HOUSING and the HOUS.FRONT SECT during rebuilds. Replacing this disk restores proper clamping force within the clutch stack, preventing premature wear on adjacent components.
Symptoms of Failure
- Delayed or harsh gear engagement: When the inner clutch disk wears thin, hydraulic pressure cannot fully clamp the pack, causing sluggish shifts or sudden jolts during acceleration.
- Transmission slipping under load: A glazed or worn friction surface leads to torque loss, particularly when climbing grades or towing heavy loads.
- Burning smell or dark fluid: Excessive heat from slipping friction material degrades the transmission fluid, producing a distinct burnt odor and discolored oil.
- Erratic shift patterns: Worn disks cause inconsistent pressure modulation, resulting in unpredictable upshifts or downshifts that worsen over time.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.214.037 |
| Inner Diameter | ~140 mm (estimated) |
| Outer Diameter | ~200 mm (estimated) |
| Thickness | ~2.5 mm (new) |
| Material | High-carbon steel with sintered bronze friction lining |
| Weight | ~0.35 kg |
| OEM Reference | ZF 0501.214.037 |
Compatibility
This inner clutch disk is specifically designed for ZF WG158 and WG200 series transmissions. It is commonly used in WG180, WG200, and WG158 variants found in medium-duty trucks, buses, and off-highway equipment. The disk interfaces directly with the HOUSING REAR PART and the OIL TUBE that supplies lubrication to the clutch pack. Always verify your transmission model tag before ordering, as WG150 and WG210 series use different friction plate stacks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101023 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201016 | HOUS.FRONT SECT | Front section of transmission housing |
| 4656301142 | OIL TUBE | Lubrication delivery to clutch pack |
| 4656201029 | HOUSING REAR PART | Rear housing section supporting output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 4656301148 | FIXING PLATE | Retains clutch pack components |
| 0636102489 | CAP SCREW | Fastener for housing joints |
| 4656301016 | SCREEN SHEET | Filter screen for oil circuit |
| 4656301017 | SCREEN SHEET | Secondary filter screen |
| 0636100803 | CAP SCREW | Bolt for clutch pack retention |
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