Overview
The ZF 4644.199.052 LOOSE PARTS kit is a critical service component engineered specifically for the WG 200 Series transmission. This OEM genuine assembly contains the necessary fasteners, seals, and positioning elements required to secure internal sub-assemblies within the transmission housing. As a loose parts set, it ensures that all small components—such as retaining rings, washers, and bolts—are replaced together during a major overhaul, preventing premature wear from mismatched hardware. The SKU 4644.199.052 is designed to interface directly with the main casing and is often ordered alongside the 4644101164: TRANSMISSION HOUSING to guarantee proper alignment of the gear train.
Symptoms of Failure
When the 4644.199.052 LOOSE PARTS begin to degrade or are missing, operators typically encounter three distinct failure modes. First, intermittent gear slippage under load occurs as fasteners loosen, allowing clutch packs to shift out of tolerance. Second, audible rattling or knocking from the bell housing indicates that retaining hardware has backed out, risking damage to the 4644301371: TRANSMISSION HOUSING. Third, chronic fluid seepage at the case seam develops when the included seals lose their compression, leading to low oil pressure and eventual overheating. These symptoms often appear gradually, making early replacement of the loose parts kit essential for avoiding a full transmission teardown.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4644.199.052 |
| Material Composition | Steel (fasteners), Nitrile (seals), Zinc-plated (washers) |
| Total Weight | 0.45 kg (1.0 lb) |
| Kit Contents | 6x bolts, 4x washers, 2x O-rings, 1x retaining ring |
| Thread Size (Primary Bolt) | M10 x 1.5 |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 4644.199.052 (Genuine) |
Compatibility
This loose parts kit is primarily validated for the ZF WG 200 Series transmissions, including the WG200, WG210, and WG220 variants. It also shares mounting patterns with the WG180 series when used in conjunction with the 0730365067: TYPE PLATE for proper identification. For installations requiring additional retention, the 0631311009: GROOVED STUD is often specified as a companion part. Always verify your transmission’s serial number against the type plate before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101164 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4644301371 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Alignment stud for housing mounting |
| 4644303060 | COVER PLATE | Seals the rear access port |
| 4644201011 | COVER PLATE | Intermediate cover for valve body |
| 4644201010 | COVER PLATE | Front cover plate for clutch access |
| 4644301372 | COVER PLATE | Side cover for filter housing |
| 0636610028 | STUD | Threaded stud for cover retention |
| 0634306525 | O-RING | Hydraulic seal for pressure circuits |
