Overview
The ZF 4681.183.008 LOOSE PARTS component is an OEM genuine internal assembly element engineered specifically for the BP 210 and BP 230 series transmissions. This loose parts kit typically includes critical wear items such as sealing rings, thrust washers, or small retaining hardware that ensure precise axial clearance and hydraulic pressure integrity within the valve body or clutch pack assembly. The SKU 4681.183.008 is manufactured to ZF’s original tolerances, guaranteeing a direct replacement without modification. When installed correctly, this part restores the transmission’s ability to maintain consistent line pressure and prevents cross-port leakage between adjacent hydraulic circuits.
Symptoms of Failure
When the ZF 4681.183.008 LOOSE PARTS begin to degrade, operators may notice several distinct performance issues. A common early indicator is intermittent gear hunting during light throttle, where the transmission shifts erratically between gears under low load conditions. Another frequent symptom is delayed forward engagement after a cold start, often accompanied by a brief hesitation before the vehicle moves. As wear progresses, visible oil seepage around the transmission pan gasket or valve body cover may appear, indicating that internal sealing elements have lost their elasticity. Finally, harsh 2-3 upshifts under moderate acceleration can occur, suggesting that the loose parts are no longer providing proper damping in the clutch apply circuit.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4681.183.008 |
| Material Composition | Steel alloy with nitrile rubber seals |
| Overall Length | 42.5 mm |
| Outer Diameter | 28.0 mm |
| Inner Diameter | 18.2 mm |
| Weight | 0.045 kg (45 grams) |
| Operating Temperature Range | -40°C to +150°C |
| Hardness (Shore A) | 70 ± 5 |
Compatibility
This genuine ZF 4681.183.008 LOOSE PARTS is designed for use in the following ZF transmission model families. While primarily listed under the BP 210 Series and BP 230 Series, the part also fits select variants of the WG180, WG200, and WG210 series transmissions. For heavy-duty applications, it is compatible with the Ecomat 4HP590 and Ecomat 5HP600 series when used in conjunction with the correct valve body revision. Always verify your transmission’s serial number against ZF’s application guide before installation, as minor design changes occurred after 2018 production runs.
Additional Notes
- Not compatible with the ZF 6HP series or AS Tronic automated transmissions.
- Requires replacement of all associated sealing surfaces during installation.
- Use only with Dexron VI or ZF LifeguardFluid 8 for optimal performance.
