Overview
The ZF 4644.199.705 LOOSE PARTS kit is a critical service assembly designed exclusively for the WG 201 Series transmission. This genuine OEM part consolidates essential wear components that secure and seal the transmission housing assembly. Specifically, the kit includes fasteners, bushings, and sealing elements that interface directly with the TRANSMISSION HOUSING (4644101172) and the TRANSMISSION HOUSING (4644301390). By replacing the SKU 4644.199.705 during a rebuild, you restore the structural integrity of the gearbox casing, preventing fluid migration and maintaining proper clamp load on internal components. This part is not a single item but a curated set of loose parts that eliminates the need to source individual fasteners and seals separately.
Symptoms of Failure
When the components within the ZF 4644.199.705 LOOSE PARTS kit degrade, operators typically notice three distinct failure modes. First, oil seepage at the housing split line occurs when the included sealing rings lose elasticity, allowing transmission fluid to weep between the THREADED BUSH (4644301189) and the housing bore. Second, intermittent gear engagement or hard shifting can result from loose fasteners that allow the housing halves to separate slightly under load, misaligning the valve body. Third, visible corrosion or stripped threads on the SCREW PLUG (0636302005) indicate that the kit’s hardware has fatigued, risking contamination ingress. These symptoms often prompt a full loose parts replacement during scheduled overhauls.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4644.199.705 |
| Kit Contents | Threaded bushings, screw plugs, sealing rings, O-rings, grooved studs |
| Material Composition | Steel (hardware), NBR (seals), Aluminum (bushings) |
| Weight (approx.) | 0.45 kg (1.0 lb) |
| Thread Pitch (primary) | M10 x 1.5 (screw plug) |
| Temperature Range | -40°C to +120°C |
| OEM Reference | ZF WG 201 Series |
Compatibility
This loose parts kit is engineered for the ZF WG 201 Series transmission family, which includes the WG180, WG200, and WG210 models. It is also compatible with select variants of the WG 150 series when used in conjunction with the correct TRANSMISSION HOUSING (4644101172). The kit directly replaces the factory-installed fasteners and seals in the main housing assembly. For applications using the TRANSMISSION HOUSING (4644301390), verify that the SCREW PLUG (0636302005) matches your drain port configuration. Always cross-reference your transmission serial number with the ZF parts catalog to confirm fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101172 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301390 | TRANSMISSION HOUSING | Alternate housing variant for WG201 |
| 4644301189 | THREADED BUSH | Provides wear-resistant thread insert |
| 0636302005 | SCREW PLUG | Seals oil drain or fill ports |
| 0634306198 | O-RING | Static seal between housing joints |
| 0634801098 | SEALING RING | Dynamic seal for rotating shafts |
| 0730365067 | TYPE PLATE | Identification tag for transmission |
| 0631311009 | GROOVED STUD | Alignment dowel for housing assembly |
| 4644301161 | COVER PLATE | Access cover for valve body |
| 0636100621 | HEXAGON SCREW | Fastener for cover plate retention |
