Overview
The ZF 4657.183.388 LOOSE PARTS kit is a critical service set designed specifically for the WG210 series transmission. This genuine OEM assembly contains the essential fasteners, seals, and positioning elements required to secure the main transmission housing sections during rebuild or repair. The SKU 4657.183.388 directly interfaces with the central casing structure, ensuring proper alignment and clamping force between the TRANSMISSION HOUSING and adjacent modules. Without this loose parts set, the transmission cannot maintain hydraulic pressure integrity or withstand operational torque loads.
Symptoms of Failure
- External oil seepage at housing joints – Worn or missing loose parts cause the HOUS.FRONT SECT to separate, allowing ATF to escape under pressure.
- Intermittent gear slippage under load – Loose fasteners from a degraded 4657.183.388 set reduce clamping force, leading to clutch pack misalignment and torque loss.
- Abnormal vibration or driveline noise – When the HOUSING REAR PART shifts due to failed loose parts, bearing preload is lost, creating a low-frequency hum.
- Delayed engagement when shifting – Compromised housing alignment from worn components in this kit disrupts valve body oil gallery sealing.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.183.388 |
| Material Composition | Case-hardened steel (fasteners), Nitrile rubber (seals) |
| Weight (kit) | 0.85 kg (1.87 lbs) |
| Fastener Torque Spec | 45–55 Nm (33–41 ft-lbs) |
| Operating Temperature Range | -40°C to +150°C |
| OEM Reference | ZF 4657.183.388 (Genuine) |
Compatibility
This loose parts kit is engineered for the ZF WG210 series but also fits select variants in the WG180, WG200, and WG220 families. It is a direct replacement for the original factory assembly that secures the HOUSING REAR SECTION to the main gear case. Always verify your transmission model suffix before ordering; the 4657.183.388 is not compatible with WG120 or WG150 units.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4657201166 | HOUS.FRONT SECT | Front section housing for input shaft bearing |
| 4657201170 | HOUSING REAR PART | Rear casing segment for output shaft support |
| 4657298102 | HOUSING REAR SECTION | Complete rear housing assembly with mounting flanges |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing positioning |
| 0636100801 | CAP SCREW | M10 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locking plate for fastener retention |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for pump intake |
| 0636100803 | CAP SCREW | M12 bolt for rear housing attachment |
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