Overview
The ZF 5840.303.451 INNER CLUTCH DISK is a precision-engineered friction component designed for the clutch pack assembly within ZF WG100, WG130, and WG131 powershift transmissions. This OEM genuine part transfers torque from the driving hub to the outer clutch drum when hydraulic pressure engages the clutch pack. Positioned between the outer clutch disks, the inner disk features specialized friction material that ensures smooth, progressive engagement under heavy load. The SKU 5840.303.451 is manufactured to ZF’s exacting tolerances, guaranteeing consistent oil flow and heat dissipation during high-cycle operations. When installed alongside a 5838109021: DIFFERENTIAL and 0750117075: TAPER ROLLER BEARING, this disk forms a critical link in the driveline’s power delivery chain.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn 5840.303.451 inner clutch disk reduces friction grip, causing noticeable hesitation or jerking when shifting between forward and reverse gears.
- Transmission oil overheating: Slipping disks generate excess heat, often indicated by burnt-smelling ATF or a rising temperature gauge during normal operation.
- Intermittent power loss under load: When the friction material is glazed or worn below minimum thickness, the transmission may momentarily lose torque delivery, especially when climbing grades or hauling heavy loads.
- Metallic debris in oil pan: Advanced wear sheds friction particles that contaminate the hydraulic system, often visible as dark specks during routine oil changes.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5840.303.451 |
| Type | Inner Clutch Disk (Friction Plate) |
| Outer Diameter | ~180 mm (estimated) |
| Inner Diameter | ~120 mm (estimated) |
| Thickness | 3.5 mm (new, nominal) |
| Material | Sintered bronze friction lining on steel core |
| Weight | 0.45 kg (approx.) |
| OEM Reference | ZF 5840.303.451 |
| Application | WG100 / WG130 / WG131 |
Compatibility
This inner clutch disk is specifically engineered for ZF’s WG-series powershift transmissions, including the WG100, WG130, and WG131 models. It is also compatible with select variants of the WG180 and WG200 series that share the same clutch pack architecture. For proper assembly, always pair this disk with a matching 5838300137: OUTER CLUTCH DISK and verify end-play using a 0631329086: SPRING PIN for alignment. Additionally, the 2095209019: DIFFERENTIAL and 5838300682: DIFFERENTIAL AXLE are frequently replaced during the same overhaul interval to prevent premature clutch wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109021 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on shafts |
| 2095209019 | DIFFERENTIAL | Rear differential assembly for WG series |
| 0631329086 | SPRING PIN | Secures clutch pack alignment |
| 5838300817 | THRUST WASHER | Controls axial clearance in clutch hub |
| 5838300682 | DIFFERENTIAL AXLE | Transfers power to wheel ends |
| 5838300811 | THRUST WASHER | Reduces friction on planetary gears |
| 5841302064 | THRUST WASHER | Spacer for clutch drum assembly |
| 5838300812 | SEALING RING | Prevents oil leakage between clutch packs |
| 5838300137 | OUTER CLUTCH DISK | Steel reaction plate for friction disks |
ZF 5840.303.451 INNER CLUTCH DISK – Clutch Disk RFQ Support
ZF 5840.303.451 INNER CLUTCH DISK is handled as a clutch disk RFQ item for transmission repair buyers who need part-number confirmation and export coordination.
Part-Number Summary
Use ZF number 5840.303.451 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: P.T.O. SHAFT
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 5840.303.451 |
|---|---|
| Normalized SKU | 5840303451 |
| Part name | INNER CLUTCH DISK |
| Product category | clutch disk |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
Related Parts
- ZF 5838.300.306 INNER CLUTCH DISK
- ZF 5838.300.307 OUTER CLUTCH DISK
- ZF 0501.342.428 OUTER CLUTCH DISK
- ZF 0501.342.427 INNER CLUTCH DISK
- ZF 0501.216.833 LINED CLUTCH DISK
