Overview
The ZF 0636.101.049 CAP SCREW is a precision-engineered fastening component designed for the WG200 and WG65 transmission series. This OEM genuine part secures critical internal assemblies within the gearbox, ensuring proper clamping force and alignment of the planetary gear sets. As a direct replacement for the original equipment, the SKU 0636.101.049 maintains the exact thread pitch and tensile strength required for high-torque applications. It works in conjunction with the 4616105413: OUTPUT and the 4616203017: OUTPUT FLANGE to maintain driveline integrity under heavy loads.
Symptoms of Failure
- Transmission oil seepage at the housing joint: A loose or fatigued cap screw can compromise the seal between the 4616101117: TRANSMISSION HOUSING and the valve body, leading to visible fluid residue on the exterior.
- Abnormal gear engagement noise: When the cap screw loses its clamping torque, internal components shift slightly, producing a metallic clatter during shifts from neutral to drive.
- Intermittent loss of hydraulic pressure: A fractured cap screw allows internal leakage paths to open, causing delayed engagement or slipping in higher gears under load.
- Vibration at the output flange: Insufficient fastening of the cap screw can cause the output flange to wobble, transmitting vibration through the driveline at highway speeds.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0636.101.049 |
| Thread Size | M10 x 1.5 (estimated) |
| Overall Length | 45 mm (estimated) |
| Head Type | Hexagon socket cap |
| Material | Alloy steel, 10.9 grade |
| Surface Finish | Zinc-plated, yellow passivated |
| Weight | 0.035 kg (estimated) |
| OEM Reference | ZF 0636.101.049 |
| Torque Specification | 45 Nm (estimated) |
Compatibility
This cap screw is specifically engineered for the ZF WG200 and WG65 series transmissions. It is also compatible with the WG180, WG150, and WG120 models that share the same planetary carrier design. The part interfaces directly with the 0636011038: HEXAGON SCREW used in adjacent mounting points. Always verify thread pitch and length against your transmission’s service manual before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers torque from planetary gears to output shaft |
| 4616203017 | OUTPUT FLANGE | Connects transmission to driveshaft |
| 4616101117 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0636011038 | HEXAGON SCREW | Secures valve body to housing |
| 0636016015 | HEXAGON SCREW | Fastens oil pan to transmission |
| 0631306085 | CYLINDRICAL PIN | Aligns clutch pack assembly |
| 0634313118 | O-RING | Seals hydraulic circuit passages |
| 0732611049 | FILTER INSERT | Traps debris in lubrication system |
| 0634303718 | O-RING | Seals output flange connection |
| 0636610082 | STUD | Provides threaded mounting for bellhousing |
