Overview
The ZF 4657.183.081 LOOSE PARTS kit is a critical service package designed specifically for the WG210 series transmission. This assembly contains the essential fasteners, seals, and positioning components required to secure the main structural elements of the gearbox during a rebuild or overhaul. Positioned at the interface between the TRANSMISSION HOUSING and the HOUS.FRONT SECT, this SKU 4657.183.081 ensures that all loose hardware is replaced with OEM-grade parts to maintain clamping force and alignment. Without this kit, the internal clearances of the WG210 can shift, leading to premature wear on planetary gears and clutch packs.
Symptoms of Failure
- Transmission oil seepage at housing joints: When the loose parts in this kit degrade, the seal between the HOUSING REAR PART and the main case loses integrity, causing fluid to weep under load.
- Intermittent gear engagement or slipping: Worn fasteners allow micro-movement in the housing sections, which misaligns the valve body and shift forks, producing delayed or harsh shifts.
- Abnormal vibration during torque converter lockup: Loose mounting points for the CYLINDRICAL PIN can cause driveline shudder, especially in WG210 units operating under heavy load.
- Increased metallic debris in the oil pan: Fretting corrosion from loose housing interfaces generates fine metal particles that contaminate the hydraulic circuit.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.183.081 |
| Kit Contents | Bolts, washers, dowel pins, sealing rings |
| Material Grade | Steel (10.9 tensile) / Nitrile seals |
| Weight (approx.) | 0.85 kg (1.87 lbs) |
| Thread Size (primary) | M10 x 1.5 |
| Torque Specification | 55 Nm ± 5 Nm |
| OEM Reference | ZF 4657.183.081 |
Compatibility
This LOOSE PARTS kit is engineered for the ZF WG210 series, but its hardware dimensions also suit the WG180 and WG200 models due to shared housing bolt patterns. It is a direct replacement for any transmission that uses the TRANSMISSION HOUSING casting with a 4657 prefix. Always verify the presence of the HOUS.FRONT SECT and HOUSING REAR PART in your assembly before ordering. The CYLINDRICAL PIN included in this kit is also used in WG115 and WG130 auxiliary drives.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101034 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201027 | HOUS.FRONT SECT | Front section housing for pump and converter |
| 4657201012 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | Fastener for housing flange |
| 4656301148 | FIXING PLATE | Retains bearing in housing bore |
| 4657301032 | SCREEN SHEET | Filter mesh for oil return circuit |
| 4657301033 | SCREEN SHEET | Fine filter for pressure line |
| 0636100803 | CAP SCREW | Fastener for valve body cover |
| 4681301040 | OIL FEED.HOUSG. | Oil supply channel housing |
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