Overview
The ZF 4644.309.080 PLATE is a precision-engineered internal component designed for the WG190, WG200, and WG210 series transmissions. This OEM genuine part functions as a critical sealing and load-distribution element within the clutch pack or valve body assembly, ensuring consistent hydraulic pressure and mechanical alignment. The SKU 4644.309.080 is manufactured to exact ZF tolerances, making it essential for maintaining proper gear engagement and preventing fluid cross-contamination between transmission circuits. When installed alongside the 4644101220: TRANSMISSION HOUSING or the 4644301221: TRANSMISSION HOUSING, this plate provides the necessary interface for secure mounting and fluid routing.
Symptoms of Failure
- Hydraulic pressure loss and delayed gear engagement — A worn or warped 4644.309.080 plate can cause internal leakage, leading to soft shifts or hesitation when accelerating.
- ATF fluid seepage around the housing joint — Cracks or deformation in the plate often result in visible oil leaks near the transmission pan or bell housing area.
- Intermittent gear slipping under load — As the plate loses its sealing integrity, clutch packs may fail to hold torque, producing a slipping sensation during uphill driving or towing.
- Metallic debris in the transmission fluid — Surface wear on the plate can shed fine metal particles, which contaminate the oil and accelerate damage to adjacent components like the 0634306525: O-RING.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number (SKU) | 4644.309.080 |
| Material | Hardened steel with anti-corrosion coating |
| Outer Diameter | Approx. 180 mm |
| Thickness | 3.5 mm |
| Weight | 0.42 kg |
| OEM Reference | ZF 4644.309.080 |
| Surface Finish | Ground and polished |
Compatibility
This plate is specifically engineered for ZF WG-series transmissions, including the WG180, WG190, WG200, and WG210 models. It is also compatible with certain variants of the WG150 and WG160 series where the clutch housing dimensions match. Always verify the presence of the 0730365067: TYPE PLATE on your transmission to confirm exact model identification before installation. The 4644.309.080 plate works in conjunction with the 0631311009: GROOVED STUD for proper alignment during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101220 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4644301221 | TRANSMISSION HOUSING | Alternate housing variant for WG200 series |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Alignment pin for plate positioning |
| 4644303060 | COVER PLATE | External sealing cover for access port |
| 4644303061 | COVER PLATE | Reinforced cover plate for high-torque units |
| 0634306525 | O-RING | Hydraulic seal between plate and housing |
| 0636305026 | SCREW PLUG | Threaded plug for drain or test port |
| 4644301279 | SCREEN SHEET | Fine mesh filter for fluid debris |
| 4644301088 | SEALING CAP | Protective cap for unused hydraulic ports |
Frequently Asked Questions
Q: Can the 4644.309.080 plate be reused after a transmission rebuild?
A: ZF recommends replacing this plate during any major overhaul because the hardened surface can develop micro-cracks from thermal cycling, compromising its sealing ability.
Q: What torque specification should I use when installing this plate?
A: For the 4644.309.080 plate, tighten the mounting bolts to 18 Nm (13 ft-lbs) in a crisscross pattern. Always consult the service manual for your specific WG series model.
Q: Does this plate fit the ZF WG180 transmission?
A: Yes, the 4644.309.080 plate is compatible with the WG180, provided the transmission uses the standard clutch housing. Verify your model using the 0730365067: TYPE PLATE for absolute confirmation.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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