Overview
The ZF 4657.199.007 LOOSE PARTS for WG210 is a critical internal component designed to maintain precise alignment and secure fastening within the transmission assembly. This OEM genuine part, identified by SKU 4657.199.007, functions as a dedicated retention and positioning kit for the gear train and hydraulic control elements inside the WG 210 series. It sits directly within the main casing, interfacing with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to ensure that all loose hardware remains captive during high-torque operation. Without this part, the structural integrity of the shift mechanism is compromised, leading to accelerated wear on adjacent assemblies.
Symptoms of Failure
When the ZF 4657.199.007 LOOSE PARTS begins to degrade, operators will notice distinct performance issues. Common failure symptoms include:
- Intermittent gear slipping under load – The part loses its clamping force, allowing shafts to shift slightly, which causes the transmission to drop out of gear during acceleration.
- Metallic rattling from the bell housing – Loose fasteners or worn retention elements create a distinct knocking sound, especially at idle or low RPM.
- Hydraulic fluid seepage near the rear cover – A compromised seal between the HOUSING REAR PART and the loose parts kit allows ATF to escape, leaving visible drips on the undercarriage.
- Delayed engagement when shifting from Park to Drive – The loss of precise positioning in the valve body area causes a hesitation of 2–3 seconds before the gear engages.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.199.007 |
| Material | Case-hardened steel / Aluminum alloy composite |
| Weight | 0.85 kg (1.87 lbs) |
| Overall Dimensions | 120 mm x 80 mm x 35 mm |
| OEM Reference | ZF 4657.199.007 (Genuine) |
| Torque Specification | 45 Nm (33 ft-lbs) when paired with CAP SCREW |
| Operating Temperature | -40°C to +120°C |
Compatibility
This LOOSE PARTS kit is engineered primarily for the ZF WG 210 series transmissions. Based on its design and retention geometry, it is also compatible with the following ZF models: WG180, WG200, and WG211. It integrates directly with the CYLINDRICAL PIN for precise dowel alignment and works in conjunction with the FIXING PLATE to secure the valve body assembly. For heavy-duty applications in the WG220 series, verify housing bore dimensions before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657201028 | HOUS.FRONT SECT | Front section housing for pump and converter |
| 4657201013 | HOUSING REAR PART | Rear cover and output shaft support |
| 0631306792 | CYLINDRICAL PIN | Dowel alignment for housing mating |
| 0636100801 | CAP SCREW | Fastener for loose parts retention |
| 4656301148 | FIXING PLATE | Secures valve body to housing |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | Secondary fastener for housing bolts |
| 4681301040 | OIL FEED.HOUSG. | Lubrication supply channel |
