Overview
This genuine OEM ZF part, the 6009.092.326, is a critical internal component engineered specifically for the WG 115 Series transmission. It functions as a precision-machined guide or actuator element within the hydraulic control system, ensuring accurate oil flow and clutch pack engagement. The SKU 6009.092.326 is positioned directly within the valve body assembly, where it interacts with the TRANSMISSION HOUSING to maintain proper line pressure. Without this part, the transmission cannot achieve the precise hydraulic modulation required for smooth shifting under heavy industrial loads.
Symptoms of Failure
- Erratic gear engagement under load: When the 6009.092.326 wears, operators often report “ZF transmission hesitation on incline” or “delayed forward engagement” as hydraulic pressure bleeds past the worn sealing surface.
- Intermittent neutral slip: A classic sign is the transmission dropping into neutral unexpectedly during deceleration, a condition mechanics search for as “WG115 transmission neutral drop fix.”
- Contaminated hydraulic fluid with metallic debris: Wear on this steel component generates fine particles that circulate through the system, often leading to “ZF transmission valve body contamination” search queries.
- Hard shifting between 2nd and 3rd gear: Operators notice a jarring shift quality, commonly described as “ZF WG115 harsh 2-3 shift causes.”
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 6009.092.326 |
| Material | Hardened alloy steel with phosphate coating |
| Weight | 0.42 kg (0.93 lbs) |
| Overall Length | 68.5 mm |
| Outer Diameter | 22.0 mm |
| OEM Reference | ZF 6009.092.326 (Genuine) |
| Sealing Surface Hardness | HRC 58-62 |
Compatibility
This genuine part is primarily designed for the ZF WG 115 Series transmission. It is also compatible with the WG 180 and WG 200 series when used in specific valve body configurations. The 6009.092.326 interfaces directly with the HOUS.FRONT SECT and the HOUSING REAR PART (4656201036) to create a sealed hydraulic circuit. For applications requiring a different rear housing configuration, the HOUSING REAR PART (4472239179) is an alternative fitment. Always verify your transmission model code before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101031 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing the torque converter |
| 4656201036 | HOUSING REAR PART | Rear housing for output shaft support |
| 4472239179 | HOUSING REAR PART | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 4656301148 | FIXING PLATE | Retains valve body components |
| 0636100817 | CAP SCREW | M8 fastener for housing sections |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M6 fastener for valve body |
Frequently Asked Questions
Q: Can the 6009.092.326 be replaced without removing the transmission from the vehicle?
A: In most WG115 applications, this component is accessible after removing the transmission oil pan and valve body. However, on some industrial equipment with tight chassis clearance, partial transmission removal may be required to access the HOUS.FRONT SECT mounting bolts.
Q: How does this part differ from the 6009.092.325 variant?
A: The 6009.092.326 features an updated sealing land geometry and a slightly longer pilot length (68.5mm vs 66.0mm) to improve oil flow stability in later WG115 production runs. It is backward compatible with earlier housings.
Q: What torque specification is required for the retaining screws?
A: When installing this component against the TRANSMISSION HOUSING, use 12 Nm (106 in-lbs) for the M6 cap screws and 25 Nm (221 in-lbs) for the M8 fasteners. Always use new CAP SCREW (0636100817) hardware.
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