Overview
The ZF 4644.301.402 Cárter de Transmisión is a critical structural housing component designed for the WG180, WG200, and WG208 series transmissions. As an OEM original part (SKU: 4644.301.402), it encloses the gear train and hydraulic control system, providing rigid alignment for shafts and bearings. This transmission case withstands high torque loads and thermal expansion, ensuring precise oil flow paths. When replacing this unit, it is essential to inspect the 4644101249: TRANSMISSION HOUSING for cracks, as both components form the primary structural envelope of the assembly.
Symptoms of Failure
- External oil seepage at mating surfaces: A cracked or warped cárter de transmisión often causes fluid to escape around the joint with the 4644301298: COVER PLATE, leading to low hydraulic pressure.
- Gear engagement hesitation or slipping: Internal fractures in the housing can misalign shift rails, resulting in delayed or incomplete gear changes under load.
- Contaminated transmission fluid: A compromised casing allows debris ingress through porous casting defects, accelerating wear on clutches and bearings.
- Abnormal vibration or noise: Distortion of the cárter de transmisión causes bearing bore misalignment, producing a low-frequency hum during acceleration.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4644.301.402 |
| Material | Aluminum alloy (A356-T6) |
| Weight | 14.2 kg (31.3 lbs) |
| Length | 520 mm |
| Width | 380 mm |
| Height | 290 mm |
| Bolt Torque Specification | 85 Nm (M12 bolts) |
| Sealing Surface Flatness | 0.05 mm max |
Compatibility
This cárter de transmisión is engineered for the ZF WG180, WG200, and WG208 series transmissions. It is a direct fit for all WG200 sub-variants, including the WG200-110 and WG200-130. The housing accommodates the 0634306323: O-RING for sealing the oil pump cavity and the 0636305026: SCREW PLUG for drain access. Verify your transmission model code before installation to ensure correct bolt pattern alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101249 | TRANSMISSION HOUSING | Main structural case for gear sets |
| 4644301298 | COVER PLATE | Seals the rear of the transmission case |
| 0634306323 | O-RING | Prevents fluid leaks at housing joints |
| 0636305026 | SCREW PLUG | Closes oil drain and fill ports |
| 4644301279 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4644301088 | SEALING CAP | Protects pressure test ports |
| 4644159347 | SHIFT SYSTEM | Controls gear selection mechanism |
| 4475280036 | SCREW-IN SLEEVE | Provides threaded insert for sensor mounting |
| 4644306511 | GEAR SHIFT HOUSING | Encloses shift fork assembly |
| 4644306440 | PISTON | Actuates clutch pack engagement |
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