Overview
This OEM genuine ZF 4681.109.002 component is a critical internal guide or support element designed for the WG190 and WG210 transmission series. It functions as a precision-machined interface within the valve body or clutch housing assembly, ensuring correct oil flow and mechanical alignment during gear shifts. The SKU 4681.109.002 is engineered to exact ZF tolerances, making it a direct replacement for worn units that compromise hydraulic pressure regulation. This part integrates directly with the TRANSMISSION HOUSING to maintain structural integrity under high torque loads.
Symptoms of Failure
- Erratic shifting or delayed engagement – A worn 4681.109.002 can cause inconsistent clutch pack application, leading to harsh or hesitant gear changes.
- Internal transmission oil leaks – Degraded sealing surfaces around this part allow pressurized fluid to bypass, resulting in low line pressure and visible drips near the bell housing.
- Whining or grinding noises during acceleration – Misalignment from a fatigued component creates metal-on-metal contact, particularly in the 3rd and 4th gear ranges.
- Intermittent gear slipping under load – When the part fails to maintain proper valve positioning, torque converter lockup may become unstable, causing RPM flare.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4681.109.002 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Weight | 0.45 kg (approx.) |
| Length | 112 mm |
| Width | 38 mm |
| Height | 22 mm |
| OEM Reference | ZF 4681.109.002 (Genuine) |
| Thread Type | Metric M8 x 1.25 |
Compatibility
This genuine ZF part is specifically engineered for the WG190 and WG210 series transmissions. It is also compatible with the WG180, WG200, and select WG150 variants where the valve body assembly shares the same mounting footprint. The 4681.109.002 works in conjunction with the HOUS.FRONT SECT and the HOUSING REAR PART to form a sealed chamber for hydraulic control. For complete rear section rebuilds, the HOUSING REAR SECTION is the matching counterpart. Always verify your transmission model code before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201183 | HOUS.FRONT SECT | Front section of split housing |
| 4657201184 | HOUSING REAR PART | Rear housing segment for clutch pack |
| 4657298111 | HOUSING REAR SECTION | Complete rear housing assembly |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | Fastener for valve body retention |
| 4681301015 | FIXING PLATE | Secures internal guide components |
| 4681301016 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4681301017 | SCREEN SHEET | Secondary filter element |
| 0636100803 | CAP SCREW | High-tensile bolt for housing clamp |
Frequently Asked Questions
Q: Can the ZF 4681.109.002 be replaced without removing the entire transmission?
Yes, in most WG190/WG210 applications, this part is accessible after removing the valve body cover and the HOUS.FRONT SECT. However, proper alignment tools are required to avoid damaging sealing surfaces.
Q: How do I know if my 4681.109.002 is genuine OEM?
Authentic parts feature a laser-etched ZF logo and part number on the flat face. Counterfeit units often have rough casting edges and incorrect thread pitch on the mounting holes.
Q: What torque specification should I use when installing this part?
ZF recommends 22 Nm for the CAP SCREW fasteners that secure this component. Always use a calibrated torque wrench and replace the FIXING PLATE if it shows signs of deformation.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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