Overview
The ZF 4651.153.003 CLUTCH is a critical torque-transfer component engineered specifically for the WG 100 and WG 110 transmission series. Positioned within the planetary gearset assembly, this OEM genuine part engages and disengages power flow between the engine and the drivetrain, ensuring smooth gear shifts and reliable power delivery under heavy-duty industrial loads. The SKU 4651.153.003 is manufactured to ZF’s exacting tolerances, utilizing high-friction materials to withstand the thermal and mechanical stress of continuous operation. When paired with a properly sealed 4651101004: TRANSMISSION HOUSING, this clutch maintains hydraulic pressure integrity, preventing premature wear and maintaining shift quality across the transmission’s service life.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn 4651.153.003 clutch often causes noticeable hesitation or a jarring “clunk” when shifting between forward and reverse, as the friction material loses its grip on the mating surfaces.
- Transmission slipping under load: When the clutch disc thickness falls below specification, the transmission may momentarily lose power during acceleration or while climbing grades, accompanied by a rise in RPM without corresponding vehicle speed.
- Contaminated transmission fluid with metallic debris: As the clutch facing degrades, fine metal particles and friction material contaminate the hydraulic fluid, often visible as a dark, gritty residue on the dipstick or during a drain.
- Overheating and burnt odor: Excessive slippage generates intense heat, leading to a distinct burnt smell from the transmission housing and potential damage to adjacent components like the 0634303928: O-RING seals.
Technical Specifications
| Part Number | 4651.153.003 |
| Product Type | Clutch Assembly (Friction Disc & Hub) |
| Outer Diameter | Approx. 250 mm |
| Inner Diameter | Approx. 160 mm |
| Thickness (New) | 8.5 mm |
| Material | Sintered Bronze / Steel Core |
| Weight | 1.8 kg |
| OEM Reference | ZF 4651.153.003 |
| Torque Capacity | Up to 1,200 Nm (estimated) |
Compatibility
This clutch is primarily designed for the ZF WG 100 and WG 110 series transmissions, commonly found in municipal trucks, fire apparatus, and heavy-duty off-road equipment. Based on its spline count and diameter, it may also be compatible with the WG 150 and WG 180 series when used in conjunction with the correct 4651301014: HOUSING and 4651301008: TRANSMISSION HOUSING. Always verify the clutch stack height against your transmission’s service manual before installation. For WG 200 applications, consult ZF technical documentation to confirm fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101004 | TRANSMISSION HOUSING | Encloses and supports the clutch and planetary gearset |
| 4651301014 | HOUSING | Rear housing section providing bearing alignment |
| 0634303928 | O-RING | Seals hydraulic fluid between housing and clutch drum |
| 4651301008 | TRANSMISSION HOUSING | Intermediate housing for torque converter section |
| 4651203002 | SCREEN SHEET | Filters debris from hydraulic fluid flow |
| 4651303005 | SCREEN SHEET | Secondary filtration for clutch lubrication circuit |
| 0636101032 | CAP SCREW | Fastens clutch pack retaining plate |
| 0630361028 | SEALING CAP | Prevents fluid leakage from clutch piston bore |
| 0636304032 | SCREW PLUG | Seals hydraulic test ports on housing |
| 0634303312 | O-RING | Seals screw plug against pressure loss |
