Overview
The ZF 4644.183.134 LOOSE PARTS for WG200 is a critical internal component designed for the WG 200 Series transmission. This OEM genuine part serves as a precision-engineered assembly element, typically functioning as a guide or spacer within the hydraulic control system or planetary gear set. It ensures correct alignment and oil flow distribution during gear shifts. The SKU 4644.183.134 is manufactured to ZF’s exacting tolerances, making it essential for maintaining the structural integrity of the transmission’s internal layout. When installed alongside a 4644101249: TRANSMISSION HOUSING or a 4644301402: TRANSMISSION HOUSING, this loose part helps secure the overall assembly against vibration and thermal expansion.
Symptoms of Failure
- Erratic gear engagement or delayed shifting: When the 4644.183.134 wears or becomes misaligned, it can cause intermittent hydraulic pressure loss, leading to harsh or delayed shifts in the WG200.
- Internal rattling or metallic noise from the transmission: A worn loose part may create excessive play, resulting in audible clattering during acceleration or deceleration, particularly in low gears.
- Oil seepage around the transmission housing interface: Degradation of this component can compromise the seal between the 0634306323: O-RING and the 4644301298: COVER PLATE, leading to slow fluid leaks.
- Reduced torque capacity under load: A failing part may allow internal slippage, causing the transmission to struggle when moving heavy loads or climbing grades.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number (SKU) | 4644.183.134 |
| Material | Hardened steel with anti-corrosion coating |
| Estimated Dimensions | 85 mm x 45 mm x 12 mm |
| Weight | 0.28 kg (0.62 lbs) |
| OEM Reference | ZF 4644.183.134 (Genuine) |
| Compatible Series | WG 200, WG 180 |
Compatibility
This genuine ZF loose part is primarily designed for the WG 200 Series transmission, but it also fits select models in the WG 180 Series due to shared internal architecture. It is a direct replacement for the original factory-installed component. For complete assembly, pair this part with a 0636305026: SCREW PLUG to secure fluid passages, and a 4644301279: SCREEN SHEET to filter debris. Always verify fitment by cross-referencing your transmission’s serial number with the SKU 4644.183.134.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101249 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4644301402 | TRANSMISSION HOUSING | Secondary housing for hydraulic components |
| 4644301298 | COVER PLATE | Seals and protects internal mechanisms |
| 0634306323 | O-RING | Prevents fluid leakage at joints |
| 0636305026 | SCREW PLUG | Seals threaded oil passages |
| 4644301279 | SCREEN SHEET | Filters contaminants from hydraulic fluid |
| 4644301088 | SEALING CAP | Protects open ports during service |
| 4644298503 | REPAIR KIT | Contains seals and gaskets for overhaul |
| 4475280079 | SCREW PLUG | High-pressure port sealing |
| 4644121150 | OIL PIPE | Routes lubrication oil to bearings |
