Overview
The ZF 4644.301.360 OIL FEED FLANGE is a precision-engineered fluid distribution component designed for the WG 201 series transmission. This OEM genuine part ensures a controlled, pressurized oil supply to critical rotating assemblies, including the torque converter and planetary gear sets. The flange mounts directly to the transmission housing, creating a sealed pathway for lubrication and hydraulic control fluid. The SKU 4644.301.360 is manufactured to ZF’s exacting tolerances, guaranteeing proper alignment and flow rate within the valve body circuit.
Symptoms of Failure
When the ZF 4644.301.360 OIL FEED FLANGE degrades, operators often notice specific performance issues. Look for these warning signs:
- External oil seepage at the flange joint – A worn gasket surface or cracked flange causes visible transmission fluid leaks around the mounting area, often mistaken for a pan gasket failure.
- Delayed engagement or gear slipping – Insufficient oil pressure due to a compromised feed path results in soft shifts or clutch pack slip under load, especially in forward gears.
- Overheating transmission fluid – Restricted oil flow through a damaged flange reduces cooling circuit efficiency, leading to elevated sump temperatures during highway operation.
- Erratic shift timing – A distorted flange bore disrupts pilot pressure to the shift valves, causing harsh or unpredictable gear changes in the WG201.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4644.301.360 |
| Material | Aluminum Alloy (EN AC-44100) |
| Surface Treatment | Anodized (MIL-A-8625 Type II) |
| Weight | 0.42 kg (0.93 lbs) |
| Overall Length | 98 mm |
| Bolt Hole Center Distance | 72 mm |
| O-Ring Groove Diameter | 32.5 mm |
| OEM Reference | ZF 4644.301.360 |
| Torque Spec (Mounting Bolts) | 25 Nm (18.4 lb-ft) |
Compatibility
This oil feed flange is specifically engineered for the ZF WG 201 series, but it also fits select variants of the WG180 and WG200 families due to shared housing architecture. It is a direct replacement for units built between 2005 and 2020. Always verify the casting number on your existing TRANSMISSION HOUSING (part 4644101160) or the later TRANSMISSION HOUSING (part 4644301323) to confirm compatibility. The flange interfaces with the THREADED BUSH (4644301189) and is secured using a SCREW PLUG (4475280043) to seal the oil gallery.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301323 | TRANSMISSION HOUSING | Updated housing variant for WG200 series |
| 4644301189 | THREADED BUSH | Guides oil flow into the flange bore |
| 4475280043 | SCREW PLUG | Seals the oil gallery access port |
| 0634306198 | O-RING | Creates a leak-proof seal at the flange face |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 4644301161 | COVER PLATE | Protects the valve body access area |
| 0636100621 | HEXAGON SCREW | Fastens the flange to the housing |
| 0631610020 | SET SCREW | Locks the threaded bush in position |
| 0501218540 | BREATHER | Vents internal pressure from the housing |
