Overview
The ZF 4657.183.381 LOOSE PARTS kit is a critical service component designed for the WG 210 Series transmission. This genuine OEM assembly contains the necessary fasteners, seals, and positioning elements required to secure internal sub-assemblies within the gearbox. Specifically, the SKU 4657.183.381 interfaces with the main casing structure, ensuring that the 4657101082: TRANSMISSION HOUSING maintains proper alignment with the rotating clutch packs. Without this loose parts set, the transmission cannot maintain hydraulic pressure integrity, leading to immediate operational failure.
Symptoms of Failure
When the 4657.183.381 LOOSE PARTS begin to degrade, operators will notice distinct performance issues. Oil seepage at the bell housing interface is a primary indicator, often mistaken for a main seal leak. Intermittent gear slippage under load occurs as the retaining hardware loosens, allowing the clutch drum to shift out of tolerance. A third symptom is abnormal metallic rattling from the transmission tunnel during deceleration, caused by loose fasteners vibrating against the 4657201166: HOUS.FRONT SECT. Finally, erratic shift timing between 2nd and 3rd gear often points to worn positioning pins within this kit.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.183.381 |
| Material Composition | Case-hardened steel & nitrile rubber |
| Weight (Kit) | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF Friedrichshafen AG |
| Fastener Torque Spec | 45 Nm ± 5 Nm |
| Operating Temperature Range | -40°C to +120°C |
| Thread Pitch | M8 x 1.25 |
Compatibility
This loose parts kit is engineered primarily for the WG 210 Series transmission family. It is also compatible with the WG 180, WG 200, and WG 211 models when used in conjunction with the correct 4657201170: HOUSING REAR PART. For WG 212 and WG 220 variants, verify the rear section casting number; if it matches the 4657298102: HOUSING REAR SECTION, this kit is a direct fit. Always cross-reference the original hardware before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0631306816 | CYLINDRICAL PIN | Aligns housing sections during assembly |
| 0636100801 | CAP SCREW | Secures valve body to main case |
| 4656301148 | FIXING PLATE | Locks clutch piston in position |
| 4657301032 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4657301033 | SCREEN SHEET | Secondary filtration for oil pump |
| 0636100803 | CAP SCREW | Fastens rear cover to housing |
