Overview
The ZF 4644.199.967 LOOSE PARTS kit is a critical service component engineered specifically for the WG 200 Series transmission. This genuine OEM assembly includes all necessary fasteners, seals, and small hardware required to secure and seal the transmission housing during overhaul or repair. Positioned at the interface between the main casing and the valve block, this kit ensures that hydraulic pressure remains stable and that no foreign debris enters the drivetrain. The SKU 4644.199.967 is factory-matched to ZF’s exact tolerances, making it the only reliable choice for maintaining the integrity of your WG200 gearbox.
Symptoms of Failure
- Hydraulic fluid seepage around the housing joint: When the loose parts kit degrades, oil can escape past the sealing surfaces, leading to low fluid levels and eventual gear slippage.
- Intermittent shift hesitation or harsh engagement: Worn fasteners or degraded O-rings inside the 4644.199.967 assembly can cause pressure loss in the shift system, resulting in delayed or jerky gear changes.
- Visible corrosion or stripped threads on mounting points: Over time, vibration and thermal cycling can compromise the hardware, making it impossible to achieve proper torque on the transmission housing.
- Unusual noise from the transmission bell housing: Loose components may rattle or allow misalignment, producing a metallic chatter that worsens under load.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4644.199.967 |
| Material Composition | Steel alloy fasteners with nitrile rubber seals |
| Weight (approx.) | 0.45 kg (1.0 lb) |
| OEM Reference | ZF Friedrichshafen AG – WG200 Series |
| Thread Pitch (primary bolts) | M8 x 1.25 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF 4644.199.967 LOOSE PARTS kit is primarily designed for the WG 200 Series transmissions, including models such as the WG180, WG200, and WG210. It is also backward-compatible with select earlier WG variants that share the same housing bolt pattern. When replacing this kit, always verify that the 4644101232 TRANSMISSION HOUSING and 4644301282 TRANSMISSION HOUSING are free from cracks or wear. Additionally, the 4475280043 SCREW PLUG and 0634306198 O-RING are frequently replaced simultaneously to guarantee a leak-free seal.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101232 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301282 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 4475280043 | SCREW PLUG | Seals oil passages during service |
| 0634306198 | O-RING | Provides fluid-tight seal between components |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 4644301298 | COVER PLATE | Protects internal shift mechanism |
| 4644106301 | SHIFT SYSTEM | Controls gear selection hydraulics |
| 4644306507 | COVER PLATE | Secondary cover for valve access |
| 4644159302 | SHIFT SYSTEM | Alternate shift system assembly |
| 4644306560 | VALVE BLOCK | Manages hydraulic flow to clutches |
