Overview
The ZF 4168.030.091 is an OEM genuine component engineered specifically for the WG100 and WG110 series transmissions. This precision-machined part functions as a critical interface element within the valve body assembly, regulating hydraulic fluid flow to ensure consistent clutch engagement and smooth gear transitions. As a direct replacement for worn units, the SKU 4168.030.091 restores original shift quality and prevents internal pressure loss. This component works in concert with the 4651101005: TRANSMISSION HOUSING to maintain structural integrity under high torque loads.
Symptoms of Failure
- Delayed or harsh shifting — When the 4168.030.091 wears, hydraulic pressure drops, causing noticeable lag between gear changes or jarring engagement, especially during cold starts.
- Intermittent gear slippage — A failing part allows fluid to bypass the clutch packs, resulting in RPM flare without corresponding acceleration, particularly under load or uphill driving.
- External oil seepage — Degraded sealing surfaces on this component lead to fluid weeping around the valve body area, often visible as drips on the transmission pan or crossmember.
- Erratic shift patterns — Worn internal bores cause unpredictable upshifts or downshifts, with the transmission sometimes hunting between gears on level terrain.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4168.030.091 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions | 85 mm x 45 mm x 30 mm |
| OEM Reference | ZF 4168.030.091 (Genuine) |
| Sealing Type | Precision ground mating surface |
Compatibility
This genuine ZF part is designed for the WG100 and WG110 transmission families, which are commonly found in medium-duty trucks, buses, and off-highway equipment. It also fits select variants of the WG180 and WG200 series where the valve body configuration matches. Always verify your transmission model code before ordering. For complete assembly integrity, pair this part with the 4651301010: HOUSING and replace the 0634303928: O-RING during installation to prevent future leaks. The 4651301017: HOUSING is also a direct companion component in this assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101005 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301010 | HOUSING | Secondary housing for valve body support |
| 0634303928 | O-RING | Seals fluid passages between components |
| 4651301017 | HOUSING | Lower valve body housing section |
| 4651203002 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4651303005 | SCREEN SHEET | Secondary filter element for debris |
| 0636101032 | CAP SCREW | Fastener for housing attachment |
| 0630361028 | SEALING CAP | Closes unused hydraulic ports |
| 0636304032 | SCREW PLUG | Threaded plug for drain or test ports |
| 0634303312 | O-RING | Seal for screw plug or cap screw |
Frequently Asked Questions
Q: Can the 4168.030.091 be reused after removal?
No. This is a wear-critical component that should always be replaced with a new OEM part during any valve body overhaul. Reusing it risks immediate hydraulic leakage and shift quality degradation.
Q: Does this part require special tools for installation?
Standard metric sockets and a torque wrench are sufficient. However, ensure the mating surfaces on the TRANSMISSION HOUSING are perfectly clean and free of old gasket material before assembly.
Q: How does this part differ from aftermarket alternatives?
OEM genuine ZF parts like the 4168.030.091 are manufactured to tighter tolerances and use superior metallurgy, ensuring consistent hydraulic control and longer service life compared to generic replacements.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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