Overview
The ZF 0636.010.041 HEXAGON SCREW is a critical fastening component engineered specifically for the WG 65 series transmission assembly. This OEM genuine part secures the 4616105413: OUTPUT and 4616203017: OUTPUT FLANGE to the 4616101117: TRANSMISSION HOUSING, ensuring precise alignment under high torque loads. The SKU 0636.010.041 is manufactured to ZF’s exacting tolerances, providing a reliable clamping force that maintains the structural integrity of the gear train. Without this hexagon screw, the entire output assembly risks loosening, leading to drivetrain instability and premature wear.
Symptoms of Failure
- Transmission oil seepage at output flange: When the 0636.010.041 hexagon screw loses its torque retention, the seal between the housing and output flange degrades, causing visible fluid drips after operation.
- Audible clunking during gear engagement: A worn or stretched hexagon screw allows micro-movement of the output assembly, producing a metallic knock when shifting from neutral to drive.
- Vibration at highway speeds: Loose fasteners in the output section create harmonic imbalance, felt as a persistent shudder through the chassis between 45-65 mph.
- Gradual gear slipping under load: Insufficient clamping force from a fatigued screw reduces the preload on the output flange, leading to intermittent power loss during acceleration.
Technical Specifications
| Specification | Value |
|---|---|
| Thread Size | M16 x 1.5 |
| Length | 45 mm |
| Head Type | Hexagon (24 mm socket) |
| Material | High-tensile steel (10.9 grade) |
| Surface Finish | Zinc-plated, yellow passivated |
| Weight | 0.08 kg |
| OEM Reference | ZF 0636.010.041 |
Compatibility
This hexagon screw is a direct fit for the ZF WG 65 series transmission, commonly used in medium-duty commercial vehicles and industrial equipment. Based on its thread pattern and length, the 0636.010.041 also serves as a replacement in the WG180, WG200, and WG250 models where output flange retention is required. Always verify the thread pitch against your existing fastener before installation. For the WG 65, this screw pairs directly with the 0636011038: HEXAGON SCREW used in the intermediate housing section.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers rotational force from the gear train |
| 4616203017 | OUTPUT FLANGE | Connects driveshaft to transmission output |
| 4616101117 | TRANSMISSION HOUSING | Encloses and supports internal components |
| 0636011038 | HEXAGON SCREW | Secures intermediate housing sections |
| 0636016015 | HEXAGON SCREW | Fastens valve body assembly |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals oil passages in the pump |
| 0732611049 | FILTER INSERT | Traps debris in hydraulic circuit |
| 0634303718 | O-RING | Prevents leaks at the output flange |
| 0636610082 | STUD | Provides threaded mounting for bell housing |
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