Overview
The ZF 4644.199.883 LOOSE PARTS set is a critical service kit designed specifically for the WG 200 Series transmission. This OEM genuine part contains the essential fasteners, seals, and small hardware required to secure internal assemblies and maintain hydraulic integrity during a rebuild or overhaul. Positioned within the main control housing and valve body area, the SKU 4644.199.883 ensures that all loose components are replaced with factory-spec parts, preventing premature wear on adjacent systems. When paired with a new 4644101177: TRANSMISSION HOUSING or a 4644301229: TRANSMISSION HOUSING, this kit guarantees a complete sealing solution for the WG200 gear train.
Symptoms of Failure
When the loose parts in this kit degrade or are not replaced during service, operators often encounter specific failure modes. Look for these warning signs:
- Intermittent gear slippage under load: Worn retaining clips or bolts can allow valve body components to shift, causing pressure loss and clutch pack slip.
- External oil seepage at housing joints: Degraded O-rings and gaskets within the 4644.199.883 set lead to slow leaks around the transmission pan and side cover.
- Erratic shift timing: Loose fasteners on the shift rail or detent assembly create inconsistent engagement points, especially in cold weather.
- Metallic debris in the oil pan: Broken studs or washers from this kit can circulate through the system, damaging the 0631311009: GROOVED STUD and other precision components.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4644.199.883 |
| Material Composition | Steel, Nitrile Rubber, Zinc-Plated Alloy |
| Weight (Kit) | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4644.199.883 |
| Thread Pitch (Primary Bolts) | M8 x 1.25 |
| Temperature Range | -40°C to +150°C |
| Compatible Housing | 4644101177 / 4644301229 |
Compatibility
This genuine ZF loose parts kit is engineered primarily for the WG 200 Series transmission family. It is also fully compatible with the WG180 and WG210 models that share the same valve body and housing architecture. The kit directly interfaces with the 0730365067: TYPE PLATE mounting holes and is required when replacing the 0631311009: GROOVED STUD during a full overhaul. Always verify your transmission serial number against the WG200 series parts catalog before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101177 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301229 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Locating pin for housing alignment |
| 4644303060 | COVER PLATE | Seals the valve body access port |
| 4644303061 | COVER PLATE | Alternate cover plate for oil pump |
| 0634306525 | O-RING | Hydraulic seal for pressure lines |
| 0636305026 | SCREW PLUG | Drain or fill port closure |
| 0501316470 | BREATHER | Ventilation cap for pressure equalization |
| 4644301279 | SCREEN SHEET | Filter mesh for oil intake |
