Overview
The ZF 4657.183.134 LOOSE PARTS kit is a critical service component designed for the WG 211 Series transmission. This OEM genuine assembly contains the essential fasteners, seals, and positioning elements required to secure internal valve bodies and hydraulic circuits within the gearbox. Specifically, the 4657.183.134 kit ensures that the 4657120005: PRESSURE REGULATOR and the 0501211384: VALVE remain correctly seated under high-pressure conditions. Without these loose parts, the transmission’s hydraulic integrity is compromised, leading to pressure loss and erratic shifting behavior.
Symptoms of Failure
- Transmission fluid seepage at valve body joints: Worn or missing loose parts allow hydraulic fluid to bypass seals, resulting in visible oil drips on the bell housing or under the vehicle.
- Erratic gear engagement during cold starts: When the 0630532183: INDENTED RING or associated fasteners lose tension, the clutch pack fails to engage smoothly, causing delayed or harsh shifts.
- Intermittent loss of drive in forward gears: A degraded loose parts set can cause the 4656306145: PISTON to stick, leading to momentary power loss when accelerating from a stop.
- Audible rattling from the transmission housing: Loose hardware within the assembly creates a metallic chatter, particularly at idle or low RPM, indicating that retaining components have fatigued.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4657.183.134 |
| OEM Reference | ZF 4657.183.134 |
| Material Composition | Hardened steel with zinc-nickel plating |
| Weight (approx.) | 0.35 kg (0.77 lbs) |
| Dimensions (L x W x H) | 120 mm x 80 mm x 25 mm |
| Compatible Series | WG 211 |
| Included Components | Retaining clips, dowel pins, sealing washers |
Compatibility
This OEM genuine loose parts kit is specifically engineered for the ZF WG 211 Series transmission. It is also backward-compatible with select models in the WG180 and WG200 families, provided the valve body configuration matches the 4657.183.134 mounting pattern. For installations involving the 4657101049: TRANSMISSION HOUSING or the 4657301130: HOUS.FRONT SECT, verify that the fastener torque specifications align with the original ZF service bulletin. The kit is not recommended for use with the WG150 series without a full hydraulic adapter assessment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Controls main line pressure to clutch packs |
| 0501211384 | VALVE | Directs hydraulic flow for shift timing |
| 0630532183 | INDENTED RING | Secures piston assembly within the drum |
| 4656306145 | PISTON | Applies force to clutch friction plates |
| 0732042767 | COMPRESSION SPRING | Returns valve spools to neutral position |
| 0631612064 | SET SCREW | Locks adjustment sleeves in valve body |
| 0631610026 | SET SCREW | Secures shift detent plate |
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657301130 | HOUS.FRONT SECT | Front section housing for torque converter |
| 4657301131 | HOUSING REAR PART | Rear section housing for output shaft |
