Overview
The ZF 4644.183.067 LOOSE PARTS kit is a critical service assembly designed specifically for the WG 201 series transmission. This OEM genuine part set contains the essential hardware and small components required to secure and seal the transmission housing during a rebuild or major repair. The SKU 4644.183.067 typically includes fasteners, seals, and positioning elements that interface directly with the main casing. When replacing the 4644101160: TRANSMISSION HOUSING or the 4644301323: TRANSMISSION HOUSING, this loose parts kit ensures all ancillary hardware is renewed to factory specifications, preventing premature wear and fluid migration.
Symptoms of Failure
When the components within the 4644.183.067 kit degrade or are omitted during service, operators often encounter specific operational issues. Look for these failure indicators:
- External oil seepage at housing joints: Worn seals or missing fasteners from the loose parts kit lead to visible fluid leaks around the transmission casing, particularly after thermal cycling.
- Abnormal gear engagement noise: If the 4644301189: THREADED BUSH or positioning screws are loose, internal clearances shift, causing a metallic rattle or grinding during shifts.
- Intermittent pressure loss: A compromised seal from the kit can cause hydraulic pressure drops, resulting in delayed or slipping gear engagement under load.
- Vibration at the bell housing: Missing or improperly torqued hardware from the loose parts set allows the housing to flex, transmitting vibration into the chassis.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.183.067 |
| Component Type | Loose Parts Kit (Hardware & Seals) |
| Material Composition | Steel (fasteners), NBR (seals) |
| Weight (approx.) | 0.45 kg (1.0 lb) |
| OEM Reference | ZF 4644.183.067 |
| Thread Pitch (primary) | M10 x 1.5 (typical) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF 4644.183.067 loose parts kit is engineered for the WG 201 transmission series. Based on its hardware configuration and seal dimensions, it is also compatible with the WG180 and WG200 series when used in conjunction with the correct main housing. The kit is specifically designed to pair with the 4475280043: SCREW PLUG for drain or fill port sealing. Always verify the housing variant—such as the 4644101160 or 4644301323—to ensure the fasteners match the thread depth and pattern of your specific transmission assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural casing for gearset |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing variant for WG series |
| 4644301189 | THREADED BUSH | Provides wear-resistant thread insert |
| 4475280043 | SCREW PLUG | Seals fluid ports in housing |
| 0634306198 | O-RING | Static seal for housing interfaces |
| 0730365067 | TYPE PLATE | Identification label for transmission |
| 4644301161 | COVER PLATE | Encloses access openings |
| 0636100621 | HEXAGON SCREW | Fastens cover plates to housing |
| 0631610020 | SET SCREW | Locks adjustment mechanisms |
| 0501218540 | BREATHER | Equalizes internal pressure |
