Overview
The ZF 4651.199.048 LOOSE PARTS set is a critical service kit designed for the WG 100 series transmission. This genuine OEM assembly contains the precise fasteners, seals, and positioning components required to secure internal valve body and clutch pack assemblies within the main gear train. Specifically engineered for the WG100, this SKU 4651.199.048 ensures that all loose hardware meets ZF’s exacting torque and material standards, preventing vibration-induced loosening during high-torque operations. When paired with a new TRANSMISSION HOUSING, this kit guarantees a factory-spec rebuild.
Symptoms of Failure
- Transmission oil leaks from the bell housing seam: Worn or missing loose parts in the 4651.199.048 kit allow the HOUSING interface to separate, causing ATF to weep under pressure.
- Intermittent gear slipping under load: When these fasteners fatigue, clutch pack clearance shifts, leading to delayed engagement in forward gears.
- Metallic rattling from the transmission pan area: Loose hardware can migrate internally, striking the HOUSING walls and generating debris.
- Erratic shift timing in WG100 units: A degraded O-RING within this kit causes hydraulic pressure loss, resulting in harsh or delayed shifts.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4651.199.048 |
| Material Composition | Steel (fasteners) / NBR (seals) |
| Weight (kit) | 0.45 kg (1.0 lb) |
| Thread Pitch (primary bolt) | M8 x 1.25 |
| Temperature Range | -40°C to +150°C |
| O-Ring Cross Section | 2.5 mm |
| Applicable Housing | 4651101007 |
Compatibility
This genuine ZF 4651.199.048 LOOSE PARTS kit is primarily validated for the WG 100 Series transmissions. Based on its fastener geometry and seal dimensions, it also directly fits the WG180 and WG200 models when used with the corresponding HOUSING variant. For WG120 and WG150 units, cross-reference the O-RING profile before installation. Always verify the HOUSING part number on your specific transmission to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101007 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4651301029 | HOUSING | Intermediate support housing for valve body |
| 0634303928 | O-RING | Hydraulic seal between housing sections |
| 4651301024 | HOUSING | Rear housing for output shaft support |
| 4651203002 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4651303005 | SCREEN SHEET | Secondary debris screen for cooler return |
| 0636101032 | CAP SCREW | High-tensile bolt for housing fastening |
| 0630361028 | SEALING CAP | Port plug for pressure test points |
| 4475280060 | SCREW PLUG | Magnetic drain plug for pan |
| 0634303312 | O-RING | Seal for screw plug interface |
