Overview
The ZF 4656.183.146 LOOSE PARTS for WG200 is a critical internal component set designed for the WG 200 series automatic transmissions. This OEM genuine part, identified by SKU 4656.183.146, serves as a precision-engineered assembly of loose hardware and fasteners that secure and align key hydraulic and mechanical elements within the transmission housing. Specifically, it interfaces directly with the 4656101023: TRANSMISSION HOUSING and the 4656201016: HOUS.FRONT SECT, ensuring that the oil distribution system and clutch packs remain properly seated under high torque loads. Without this genuine loose parts kit, the structural integrity of the valve body and oil circuit is compromised, leading to operational instability.
Symptoms of Failure
When the ZF 4656.183.146 LOOSE PARTS begin to fail, operators will notice distinct performance degradation. Oil leaks at the housing seam are the most common early indicator, often traced to loose or fatigued fasteners that cannot maintain seal pressure. Gear slipping during upshifts occurs when these parts lose their clamping force on the 4656301142: OIL TUBE, causing hydraulic pressure drops. A third symptom is intermittent loss of reverse gear engagement, which signals that the loose parts are no longer securing the rear section of the transmission. Finally, abnormal vibration at highway speeds can develop if the 4656201029: HOUSING REAR PART shifts out of alignment due to worn fasteners in this kit.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4656.183.146 |
| Material | Hardened alloy steel with zinc-nickel plating |
| Weight | 0.45 kg (1.0 lb) |
| Dimensions | 120 mm x 80 mm x 25 mm (kit) |
| OEM Reference | ZF 4656.183.146 |
| Thread Pitch | M8 x 1.25 (primary fasteners) |
| Torque Specification | 25 Nm (18.4 ft-lb) |
Compatibility
This loose parts kit is engineered specifically for the ZF WG 200 series transmissions, including models WG200, WG201, and WG202. It is also backward-compatible with the ZF WG180 series (WG180, WG181) when used in conjunction with the correct 4656101023: TRANSMISSION HOUSING. The kit does not fit the WG150 or WG250 series due to differences in bolt pattern spacing and oil tube diameter. Always verify your transmission serial number against the OEM parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101023 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4656201016 | HOUS.FRONT SECT | Front section housing for torque converter and pump |
| 4656301142 | OIL TUBE | Hydraulic fluid conduit between valve body and clutches |
| 4656201029 | HOUSING REAR PART | Rear housing section supporting output shaft and PTO |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 4656301148 | FIXING PLATE | Retaining plate for oil tube and valve body |
| 0636102489 | CAP SCREW | High-tensile fastener for housing joints |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic oil return |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for suction line |
| 0636100803 | CAP SCREW | Low-profile bolt for oil pan attachment |
