Overview
The ZF 4644.183.063 LOOSE PARTS kit is a critical service component designed specifically for the WG 200 series transmission. This genuine OEM assembly contains the necessary loose hardware and small components required to secure and seal internal transmission assemblies during rebuilds or major repairs. Positioned within the valve body and housing interface areas, the 4644.183.063 ensures proper clamping force and leak-free operation of the transmission’s hydraulic circuits. When replacing major assemblies such as the 4644101232: TRANSMISSION HOUSING or the 4644301282: TRANSMISSION HOUSING, this loose parts kit is indispensable for completing the installation with factory-specified fasteners and seals.
Symptoms of Failure
- External oil seepage around housing joints: Worn or missing loose parts from the 4644.183.063 kit can cause hydraulic fluid to weep from the transmission housing mating surfaces, leading to low fluid levels and potential overheating.
- Intermittent gear slipping under load: When the loose hardware fails to maintain proper valve block torque, hydraulic pressure drops can cause the transmission to slip between gears, particularly during uphill climbs or heavy towing.
- Loose or rattling transmission cover plates: Degraded fasteners or missing components from this kit result in audible rattling from the 4644301298: COVER PLATE area, indicating imminent hardware failure.
- Persistent fluid contamination: Failed O-rings and seals within the loose parts kit allow debris to enter the hydraulic system, accelerating wear on the 4644306560: VALVE BLOCK and shift components.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4644.183.063 |
| OEM Reference | ZF 4644.183.063 |
| Material Composition | Steel fasteners, nitrile rubber seals, zinc-plated hardware |
| Weight | 0.45 kg (1.0 lb) |
| Dimensions (packaged) | 150 mm x 100 mm x 40 mm |
| Thread Pitch (primary bolts) | M8 x 1.25 |
| Temperature Range | -40°C to +150°C |
| Related Components | 0730365067: TYPE PLATE, 4475280043: SCREW PLUG, 0634306198: O-RING |
Compatibility
This genuine ZF 4644.183.063 loose parts kit is engineered for the WG 200 series transmission family. It is directly compatible with WG180, WG200, and WG210 models produced after 2008. The kit also supports the WG 200 variants used in off-highway trucks, agricultural tractors, and industrial material handlers. When servicing the 4644106301: SHIFT SYSTEM or the 4644159302: SHIFT SYSTEM, this loose parts kit provides all necessary hardware for reassembly. Always verify your transmission serial number against ZF’s compatibility chart before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101232 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301282 | TRANSMISSION HOUSING | Secondary housing for valve body area |
| 4475280043 | SCREW PLUG | Seals hydraulic test ports |
| 0634306198 | O-RING | Provides static seal between components |
| 0730365067 | TYPE PLATE | Identification plate with transmission specs |
| 4644301298 | COVER PLATE | Access cover for valve block inspection |
| 4644106301 | SHIFT SYSTEM | Controls gear selection hydraulics |
| 4644306507 | COVER PLATE | Bottom cover for oil pan area |
| 4644159302 | SHIFT SYSTEM | Secondary shift actuator assembly |
| 4644306560 | VALVE BLOCK | Hydraulic control manifold |
