Overview
The ZF 4681.183.024 LOOSE PARTS kit is a critical service component designed for the internal hydraulic and mechanical control systems of ZF’s BP 210 and BP 230 series transmissions. This OEM genuine part functions as a precision-machined valve or actuator assembly that regulates oil flow to the clutch packs and planetary gear sets. When installed correctly, it ensures consistent shift timing and pressure modulation. The SKU 4681.183.024 is specifically engineered to restore factory tolerances within the valve body, addressing wear that naturally occurs over thousands of operational hours in heavy-duty applications.
Symptoms of Failure
When the ZF 4681.183.024 component begins to degrade, operators will notice distinct performance issues. Recognizing these signs early can prevent catastrophic transmission damage.
- Erratic shift timing and gear hunting: A worn 4681.183.024 part causes the transmission to hesitate between gears or “hunt” for the correct ratio under load, particularly during uphill climbs or when towing heavy loads.
- Internal hydraulic pressure loss: Degraded sealing surfaces within this loose parts kit lead to gradual pressure drops, resulting in soft or slipping clutch engagement that worsens as the transmission heats up during extended operation.
- Delayed engagement from Neutral to Drive or Reverse: Operators may experience a 2-3 second lag when shifting from park or neutral, accompanied by a low-frequency hum from the pump struggling to build pressure through the compromised valve body.
- Visible oil contamination in the pan: As the part wears, fine metallic particles shed into the transmission fluid, creating a silvery sheen on the dipstick and accelerating wear on adjacent components like the torque converter.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4681.183.024 |
| OEM Reference | ZF 4681 183 024 |
| Material | Hardened aluminum alloy with nitrile sealing elements |
| Weight | 0.85 kg (1.87 lbs) |
| Overall Length | 142 mm |
| Maximum Operating Pressure | 18 bar (261 psi) |
| Temperature Range | -20°C to +120°C (-4°F to +248°F) |
Compatibility
This genuine ZF loose parts kit is engineered for direct fitment in the following transmission families. While primarily designed for the BP 210 Series and BP 230 Series, it also serves as a direct replacement in earlier ZF models that share the same valve body architecture.
- ZF BP 210 Series – All variants including BP 210, BP 210C, and BP 210E
- ZF BP 230 Series – Standard and heavy-duty configurations
- ZF WG180 Series – Select models with serial numbers after 2015
- ZF WG200 Series – When used with adapter plate kit 4681.183.025
- ZF Ecomat 4HP – Limited compatibility; verify valve body casting number
For precise cross-referencing, always consult the ZF parts catalog using the 4681.183.024 SKU to confirm fitment with your specific transmission serial number.
