Overview
The ZF 4644.183.034 LOOSE PARTS kit is a critical service component designed specifically for the WG 200 series transmission. This OEM genuine assembly includes all necessary fasteners, seals, and small hardware required to secure internal transmission elements during a rebuild or major repair. Positioned within the main gear train housing, this kit ensures that the TRANSMISSION HOUSING and TRANSMISSION HOUSING remain properly aligned and sealed under high torque loads. The SKU 4644.183.034 is factory-matched to ZF’s original tolerances, eliminating guesswork during reassembly.
Symptoms of Failure
When the 4644.183.034 LOOSE PARTS begin to degrade or are improperly installed, operators may notice specific failure modes. Oil seepage around the housing mating surfaces is a common early indicator, often accompanied by a gradual loss of transmission fluid. Gear engagement hesitation or slipping can occur if fasteners loosen, allowing internal components to shift. Unusual metallic rattling from the bell housing suggests that retaining hardware has fatigued. Finally, erratic shift timing may develop as the TYPE PLATE alignment shifts, throwing off sensor readings.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.183.034 |
| Material Composition | Steel alloy with zinc-nickel plating |
| Weight (kit) | 0.85 kg (1.87 lbs) |
| Fastener Torque Spec | 45 Nm ± 5 Nm |
| OEM Reference | ZF 4644.183.034 |
| Thread Pitch | M8 x 1.25 (primary) |
| Operating Temperature Range | -40°C to +120°C |
| Hardness Rating | HRC 28-32 |
Compatibility
This LOOSE PARTS kit is engineered for the ZF WG 200 series, but it also fits select WG 180 and WG 190 variants that share the same housing architecture. It is directly compatible with transmissions using the GROOVED STUD retention system. For WG 200 models built after 2015, verify that the TRANSMISSION HOUSING casting number matches the revision level of this kit. The 4644.183.034 is not backward-compatible with pre-2000 WG 100 series units.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101131 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4644301228 | TRANSMISSION HOUSING | Secondary housing section for clutch pack |
| 0730365067 | TYPE PLATE | Identification plate with serial number |
| 0631311009 | GROOVED STUD | Alignment stud for housing positioning |
| 4644301298 | COVER PLATE | Seals the inspection port |
| 0634306525 | O-RING | Hydraulic seal for pressure circuits |
| 0636305026 | SCREW PLUG | Drain/fill port closure |
| 4475280078 | ADAPTER | Converter-to-housing interface |
| 0501316470 | BREATHER | Pressure equalization valve |
| 4644301279 | SCREEN SHEET | Filter mesh for oil pickup |
