Overview
The ZF 4644.199.840 LOOSE PARTS kit is a critical OEM genuine service component designed specifically for the WG 200 Series transmission. This assembly consolidates essential fasteners, seals, and small hardware elements that secure internal transmission sub-systems. Positioned within the main gear case, the SKU 4644.199.840 ensures that the TRANSMISSION HOUSING maintains structural integrity under high torque loads. Without this loose parts set, proper clamping force and fluid containment cannot be guaranteed, making it indispensable during any major overhaul or rebuild of the WG200 gearbox.
Symptoms of Failure
- Oil seepage at housing joints: When the 4644.199.840 loose parts degrade, bolts and seals lose tension, leading to visible transmission fluid leaks around the DISCONNECTION area.
- Gear engagement hesitation: Worn hardware inside this kit can cause misalignment of the OUTPUT FLANGE, resulting in delayed or rough shifting during acceleration.
- Abnormal vibration from the driveline: Loose fasteners from this set allow the OUTPUT FLANGE to shift slightly, producing low-frequency vibrations that worsen under load.
- Increased operating noise: A rattling sound from the bell housing often indicates that the loose parts have fatigued, compromising the secure fit of internal components.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.199.840 |
| Material | Steel alloy with zinc plating (fasteners); NBR (seals) |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions | 180 mm x 120 mm x 40 mm (kit packaging) |
| OEM Reference | ZF 4644.199.840 |
| Compatible Series | WG 200, WG 180 (partial) |
Compatibility
This genuine ZF part is engineered primarily for the WG 200 Series transmissions, including models WG200, WG210, and WG220. It also shares cross-compatibility with select WG180 variants where the TRANSMISSION HOUSING design matches the bolt pattern of the 4644.199.840 kit. Always verify your transmission serial number before ordering, as earlier WG150 units may require a different loose parts set.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105417 | DISCONNECTION | Clutch disconnection mechanism |
| 4644303547 | OUTPUT FLANGE | Torque transfer to driveshaft |
| 4644303012 | OUTPUT FLANGE | Alternate output flange variant |
| 4644101121 | TRANSMISSION HOUSING | Main structural casing |
| 4644301240 | TRANSMISSION HOUSING | Housing for WG200 series |
| 0730365067 | TYPE PLATE | Identification plate for transmission |
| 0631311009 | GROOVED STUD | Alignment stud for housing |
| 4644301286 | COVER PLATE | Seals internal oil passages |
| 4644301242 | COVER SHEET | Protective sheet for valve body |
| 0636101026 | CAP SCREW | High-tensile fastener for flanges |
