Overview
The ZF 4657.183.248 LOOSE PARTS kit is an OEM genuine assembly component specifically engineered for the WG 210 Series transmission. This critical set of loose parts serves as the foundational hardware for securing and aligning the main transmission housing sections. It includes all necessary fasteners, dowels, and locating elements that ensure the TRANSMISSION HOUSING remains rigidly coupled to the HOUS.FRONT SECT and the HOUSING REAR PART. Without this specific SKU (4657.183.248), the structural integrity of the gear train is compromised, leading to misalignment under load. This kit is a direct replacement for the original factory configuration, eliminating guesswork during rebuilds.
Symptoms of Failure
When the 4657.183.248 loose parts assembly begins to degrade, operators will notice distinct operational issues. The most common failure symptoms include:
- Oil leaks at the housing seam: Worn or missing fasteners cause the HOUSING REAR SECTION to separate slightly, allowing ATF to weep under pressure.
- Gear slipping under moderate torque: Loose housing sections allow the main shaft to shift axially, causing intermittent clutch pack disengagement.
- Abnormal vibration during shifting: Misaligned housing bores create binding in the planetary gear sets, translating to driveline shudder.
- Hard-to-diagnose whining noise: When the loose parts fail, bearing preload is lost, resulting in a high-pitched whine from the rear section.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4657.183.248 |
| Material Composition | Case-hardened steel (fasteners) / Zinc-plated alloy (locators) |
| Weight (approx.) | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4657.183.248 (Genuine) |
| Compatible Series | WG 210 |
| Thread Pitch (primary) | M10 x 1.5 (metric fine) |
| Torque Specification | 45 Nm + 90° angle (factory spec) |
Compatibility
This loose parts kit is primarily designed for the WG 210 transmission family. However, due to shared architecture, it is also compatible with the WG 180 and WG 200 series when used in conjunction with the correct TRANSMISSION HOUSING. The kit is not recommended for the older WG 120 series without verifying the bolt pattern against the HOUS.FRONT SECT interface. Always cross-reference the HOUSING REAR PART casting number to confirm fitment. For WG 210 applications, this kit is the definitive OEM solution.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0631306816 | CYLINDRICAL PIN | Precise alignment dowel for housing mating faces |
| 0636100801 | CAP SCREW | Primary fastening bolt for front section |
| 4656301148 | FIXING PLATE | Locks bearing retainers in position |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil gallery protection |
| 4657301033 | SCREEN SHEET | Secondary filter screen for valve body |
| 0636100803 | CAP SCREW | Rear housing mounting bolt (longer shank) |
