Overview
The ZF 4644.183.043 LOOSE PARTS for WG201 is a critical internal component set designed for the WG 201 series transmission. This genuine OEM assembly includes the necessary loose hardware and fittings required to secure and seal the transmission housing during rebuilds or maintenance. Specifically, the SKU 4644.183.043 serves as the fastening and sealing kit that sits between the main transmission housing and the cover plate assembly, ensuring proper clamping force and fluid retention. Without this specific loose parts set, the transmission cannot maintain its structural integrity under load.
Symptoms of Failure
When the ZF 4644.183.043 LOOSE PARTS begin to degrade, operators typically notice several distinct failure modes. Oil leaks at the housing seam are the most common symptom, often appearing as drips around the bell housing or mid-case joint. Another frequent issue is gear slipping under moderate to heavy load, caused by insufficient clamping pressure from worn fasteners. Technicians also report abnormal vibration during gear shifts, which indicates that the loose parts have loosened over time. Finally, intermittent loss of hydraulic pressure can occur when the sealing elements within this kit fail, leading to erratic transmission behavior.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4644.183.043 |
| Material | Hardened Steel / Nitrile Rubber (Seals) |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions | 180 mm x 120 mm x 45 mm (Kit) |
| OEM Reference | ZF 4644.183.043 |
| Thread Pitch | M10 x 1.5 (Primary Fasteners) |
| Operating Temperature | -40°C to +120°C |
Compatibility
This genuine ZF 4644.183.043 LOOSE PARTS kit is engineered primarily for the WG 201 Series transmissions. Based on the part type and fastening geometry, it is also compatible with the WG180 and WG200 series models that share the same housing bolt pattern. Additionally, it can be used in select WG150 variants where the housing interface matches. Always verify your transmission model before installation, as the TRANSMISSION HOUSING (4644101160) and TRANSMISSION HOUSING (4644301323) must be compatible with this kit. For proper sealing, pair this set with the THREADED BUSH (4644301189) and the SCREW PLUG (4475280043) to complete the assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing variant for WG series |
| 4644301189 | THREADED BUSH | Provides threaded anchor points for fasteners |
| 4475280043 | SCREW PLUG | Seals fluid passages in the housing |
| 0634306198 | O-RING | Creates hydraulic seal between components |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 4644301161 | COVER PLATE | Protects internal components from debris |
| 0636100621 | HEXAGON SCREW | Secures housing to transmission case |
| 0631610020 | SET SCREW | Adjusts clearance in valve body assembly |
| 0501218540 | BREATHER | Equalizes internal pressure during operation |
