Overview
The ZF 4657.185.119 ACCESSORIES component is a critical OEM genuine part designed for the WG210 series transmission. This accessory assembly functions as a mounting interface and fluid routing manifold, positioned between the main transmission housing and the front section of the gearbox. It ensures proper alignment of hydraulic passages and provides structural support for adjacent drivetrain components. The SKU 4657.185.119 is manufactured to ZF’s exacting tolerances, making it essential for maintaining the integrity of the WG210’s power flow. When paired with the 4657101082 TRANSMISSION HOUSING, this accessory creates a sealed environment that prevents contamination and supports consistent oil pressure.
Symptoms of Failure
- External oil seepage near the bell housing: Worn gaskets or cracked mounting surfaces on the 4657.185.119 can cause transmission fluid to leak, leading to low fluid levels and eventual gear slipping.
- Intermittent gear engagement hesitation: If this accessory loses its structural rigidity, the 4657201166 HOUS.FRONT SECT may shift, disrupting hydraulic pressure to the clutch packs.
- Unusual vibration during acceleration: A degraded accessory can fail to dampen torsional forces, transferring excess vibration through the 4657201170 HOUSING REAR PART and into the chassis.
- Delayed reverse engagement: Blocked oil galleries within the accessory restrict fluid flow to the rear planetary gearset, causing a noticeable lag when shifting into reverse.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.185.119 |
| Material | Die-cast aluminum alloy (A380) |
| Weight | 1.85 kg (4.08 lbs) |
| Length | 245 mm |
| Width | 180 mm |
| Height | 95 mm |
| Bolt Hole Pattern | 6x M10 x 1.5, 120 mm PCD |
| Sealing Surface Finish | Ra 0.8 µm |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 4657.185.119 |
Compatibility
This accessory is engineered for the ZF WG210 series, but it also fits select variants of the WG180 and WG200 transmissions due to shared mounting interfaces. It is directly compatible with the 4657298102 HOUSING REAR SECTION and the 4657201166 HOUS.FRONT SECT. Always verify your transmission’s serial number before installation. The part is not suitable for WG120 or WG150 models without adapter kits.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gearset |
| 4657201166 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201170 | HOUSING REAR PART | Rear casing for output shaft support |
| 4657298102 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | M10 bolt for securing accessory |
| 4656301148 | FIXING PLATE | Retainer plate for oil filter |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M12 bolt for rear housing |
