Overview
The ZF 4651.199.017 LOOSE PARTS set is a critical OEM genuine service kit designed specifically for the WG 100 series transmission. This assembly contains the essential fasteners, seals, and positioning components required to secure internal hydraulic circuits and valve body assemblies within the transmission housing. As a loose parts kit, it replaces the individual washers, bolts, and retainers that can degrade over time, ensuring proper clamping force and fluid sealing. The SKU 4651.199.017 is a direct factory replacement, eliminating the guesswork of sourcing mismatched hardware. When installed alongside the 4651101004: TRANSMISSION HOUSING and the 4651301014: HOUSING, this kit restores the structural integrity of the gear train assembly.
Symptoms of Failure
- Intermittent gear slippage under load: Worn or missing loose parts can cause valve body misalignment, leading to pressure loss and clutch pack slip during acceleration.
- External oil seepage at housing joints: Degraded O-rings and fasteners from this kit allow transmission fluid to weep past the 0634303928: O-RING sealing surfaces, leaving visible drips on the bell housing.
- Abnormal driveline vibration: Loose retaining hardware permits axial play in the intermediate plate, creating a low-frequency shudder during torque converter lockup.
- Erratic shift timing: When the loose parts set fails, hydraulic passages become obstructed, causing delayed engagement between 2nd and 3rd gear in WG100 transmissions.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4651.199.017 |
| Material Composition | Steel (fasteners), Nitrile rubber (seals), Zinc-plated carbon steel (washers) |
| Weight (kit) | 0.45 kg (1.0 lb) |
| Package Dimensions | 150 mm x 100 mm x 40 mm |
| Operating Temperature Range | -40°C to +120°C |
| Hardware Grade | Class 10.9 (bolts), 70 Shore A (O-rings) |
| OEM Reference | ZF Friedrichshafen AG |
Compatibility
This genuine ZF 4651.199.017 loose parts kit is engineered for the WG 100 series transmission family. It is directly compatible with the following models: WG100, WG120, WG150, WG180, and WG200. The kit also interfaces with the 4651301008: TRANSMISSION HOUSING used in later WG200 variants. For optimal sealing, always pair this kit with a new 0634303928: O-RING during reassembly. Do not use this kit with pre-1990 WG80 or WG90 models, as the bolt patterns differ.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101004 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301014 | HOUSING | Intermediate plate for valve body mounting |
| 0634303928 | O-RING | Hydraulic seal between housing sections |
| 4651301008 | TRANSMISSION HOUSING | Rear housing for WG200 models |
| 4651203002 | SCREEN SHEET | Fine mesh filter for oil pump intake |
| 4651303005 | SCREEN SHEET | Secondary filter for valve body circuit |
| 0636101032 | CAP SCREW | M10 bolt for housing flange retention |
| 0630361028 | SEALING CAP | Plugs unused hydraulic ports |
| 0636304032 | SCREW PLUG | Drain/fill port closure |
| 0634303312 | O-RING | Seal for screw plug applications |
