Overview
The ZF 4657.183.139 LOOSE PARTS kit is a critical service component designed specifically for the WG 210 series transmission. This OEM genuine assembly includes all necessary fasteners, seals, and positioning elements required to secure and align the main transmission housing sections during rebuild or repair. The SKU 4657.183.139 ensures that the internal gear train and hydraulic circuits maintain their precise tolerances, preventing axial movement and fluid bypass. When paired with the TRANSMISSION HOUSING (4657101050), this kit provides the foundational integrity for the entire drivetrain assembly.
Symptoms of Failure
- Transmission fluid seepage at housing joints: Worn or missing loose parts can cause oil to weep from the mating surfaces between the HOUS.FRONT SECT (4657201028) and the main case, leading to gradual fluid loss.
- Audible gear rattle or clunking during engagement: When the loose parts kit degrades, internal clearances increase, allowing gear sets to shift slightly under load, producing metallic noise.
- Intermittent gear slippage under heavy torque: Loss of clamping force from degraded fasteners can cause the HOUSING REAR PART (4657201013) to misalign, reducing clutch pack engagement pressure.
- Vibration through the driveline at highway speeds: A compromised loose parts assembly allows the CYLINDRICAL PIN (0631306792) to shift, creating rotational imbalance.
Technical Specifications
| Part Number | 4657.183.139 |
| Material | Case-hardened steel with zinc-nickel plating |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4657.183.139 (Genuine) |
| Thread Pitch | M10 x 1.5 (primary fasteners) |
| Torque Spec | 45 Nm ± 5 Nm |
| Operating Temp Range | -40°C to +120°C |
Compatibility
This loose parts kit is engineered for the ZF WG 210 series, but its fastening geometry also applies to the WG180, WG200, and WG250 models that share the same housing bolt pattern. It is essential for any rebuild involving the TRANSMISSION HOUSING or its front/rear sections. Always verify that the CYLINDRICAL PIN is included in your kit before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101050 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201028 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201013 | HOUSING REAR PART | Rear section supporting output flange |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing sections |
| 0636100801 | CAP SCREW | M10 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locks bearing in position |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M8 bolt for accessory mounting |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil distribution manifold |
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