Overview
The ZF 6009.012.254 AUTOMATIC is a precision-engineered hydraulic control unit specifically designed for the WG 65 Series transmission family. This OEM genuine component governs clutch modulation and shift timing within the valve body assembly, ensuring smooth gear transitions under heavy-duty loads. As a critical part of the transmission’s hydraulic circuit, it directly interfaces with the OUTPUT shaft assembly and the TRANSMISSION HOUSING to regulate oil pressure. The SKU 6009.012.254 is factory-calibrated to ZF’s exacting tolerances, making it a direct replacement for worn units in WG65 applications.
Symptoms of Failure
- Erratic gear engagement or delayed shifting – When the 6009.012.254 loses calibration, the transmission may hesitate before engaging drive or reverse, especially under load.
- Intermittent oil leaks near the valve body – Worn seals on this unit can cause ATF to seep past the OUTPUT FLANGE area, leaving visible drips on the housing.
- Harsh or clunking upshifts – A failing control unit disrupts hydraulic pressure modulation, leading to abrupt gear changes that stress the drivetrain.
- Transmission slipping in higher gears – Reduced hydraulic integrity from this part can cause the clutch packs to lose grip, resulting in RPM flare without acceleration.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 6009.012.254 |
| Type | Hydraulic Control Unit (Automatic) |
| Material | Die-cast aluminum with steel valve spools |
| Weight | 2.4 kg (5.3 lbs) |
| Dimensions (L x W x H) | 210 mm x 140 mm x 95 mm |
| OEM Reference | ZF 6009.012.254 |
| Seal Compatibility | Nitrile rubber (NBR) O-rings |
| Operating Pressure | 12–18 bar |
Compatibility
This part is engineered for the ZF WG 65 Series, including models such as WG65, WG80, WG100, WG120, WG150, WG180, and WG200. It is also backward-compatible with select earlier WG variants that share the same valve body architecture. Always verify the TRANSMISSION HOUSING casting number and the HEXAGON SCREW torque specifications before installation to ensure proper fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105415 | OUTPUT | Transfers torque from transmission to driveshaft |
| 4616303144 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101094 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0636011038 | HEXAGON SCREW | Secures valve body to housing |
| 0636011118 | HEXAGON SCREW | Fastens output flange assembly |
| 0636016015 | HEXAGON SCREW | Mounts control unit bracket |
| 0631306085 | CYLINDRICAL PIN | Aligns valve body components |
| 0634313118 | O-RING | Seals hydraulic passages |
| 0732611049 | FILTER INSERT | Traps debris in oil circuit |
| 0634303718 | O-RING | Prevents external oil leaks |
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