Overview
The ZF 4642.199.389 LOOSE PARTS kit is a critical service component designed specifically for the WG 201 Series transmission. This genuine OEM assembly contains the essential loose hardware required to secure and seal internal transmission elements during a rebuild or major repair. Positioned within the valve body and housing interface, this kit ensures that all fasteners and small components are correctly torqued and seated to maintain hydraulic pressure integrity. The SKU 4642.199.389 is often ordered alongside a new 4644101160: TRANSMISSION HOUSING to guarantee a complete sealing surface for the gear train.
Symptoms of Failure
When the ZF 4642.199.389 LOOSE PARTS begin to degrade or are missing, operators will notice distinct operational issues. Look for these specific failure symptoms:
- Hydraulic fluid seepage at the housing joint: Worn or missing loose parts allow pressurized ATF to escape, creating visible wet spots on the bell housing.
- Intermittent gear slippage under load: If the retaining hardware loosens, clutch pack clearance changes, leading to delayed engagement or slipping during uphill pulls.
- Abnormal rattling or vibration from the transmission case: Loose fasteners from the 4642.199.389 set cause internal components to shift, producing a metallic chatter at idle.
- Difficulty shifting into forward or reverse gears: A compromised seal from degraded parts reduces line pressure, making gear selection sluggish or impossible.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4642.199.389 |
| OEM Reference | ZF WG 201 Series |
| Material Composition | Steel alloy with zinc plating |
| Weight (approx.) | 0.45 kg (1.0 lb) |
| Dimensions (L x W x H) | 120 mm x 80 mm x 30 mm |
| Thread Pitch | M10 x 1.5 (primary fasteners) |
| Hardness Rating | HRC 28-32 |
Compatibility
This genuine ZF 4642.199.389 LOOSE PARTS kit is engineered for the WG 201 transmission family. It is directly compatible with the WG180, WG200, and WG210 models that share the same housing architecture. The kit also fits select WG 211 variants when used with a 4644301323: TRANSMISSION HOUSING adapter. For older WG 190 series units, verify the housing bolt pattern before installation, as the 4644301189: THREADED BUSH may require a different torque specification. Always pair this kit with a new 4475280043: SCREW PLUG to prevent cross-threading in the valve body.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural case for gear assembly |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing for WG 201 variants |
| 4644301189 | THREADED BUSH | Reinforced insert for bolt threads |
| 4475280043 | SCREW PLUG | Seals hydraulic passages |
| 0634306198 | O-RING | Prevents fluid leaks at joints |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 4644301161 | COVER PLATE | Protects internal components from debris |
| 0636100621 | HEXAGON SCREW | Fastens housing to bell housing |
| 0631610020 | SET SCREW | Adjusts clutch pack preload |
| 0501218540 | BREATHER | Equalizes internal pressure |
