Overview
The ZF 0636.103.413 HEXAGON SCREW is a critical fastening component engineered for the WG200, WG92, and WG98 series transmissions. This OEM genuine part secures the TRANSMISSION HOUSING assembly, ensuring precise alignment of internal gear sets and hydraulic circuits. Designed to withstand high torque loads and thermal cycling, the SKU 0636.103.413 prevents loosening under vibration, maintaining structural integrity within the transmission’s clutch and planetary gear sections. Its hexagonal head allows for accurate torque application during installation, directly influencing the longevity of adjacent components like the HOUSING and PERIPHERALS.
Symptoms of Failure
- Hydraulic fluid seepage around the housing joint: A worn or stripped hexagon screw compromises the seal between the transmission housing and valve body, leading to visible oil leaks near the bell housing area.
- Intermittent gear engagement hesitation: When this fastener loses clamping force, internal clearances shift, causing delayed shifts or slipping in WG200 and WG92 series units during load changes.
- Abnormal metallic rattling from the transmission pan: Loose hexagon screws allow the RANGE SELECTOR mechanism to vibrate against the housing, producing a distinct rattle at idle or low RPM.
- Torque converter shudder under acceleration: Insufficient fastening of the housing alters fluid pressure paths, creating shudder sensations that worsen with temperature increases.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0636.103.413 |
| Head Type | Hexagon (Hex Head) |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 35 mm (estimated) |
| Material | High-tensile alloy steel, zinc-plated |
| Weight | 0.045 kg (estimated) |
| OEM Reference | ZF 0636.103.413 |
| Torque Specification | 45 Nm (factory spec) |
Compatibility
This hexagon screw is directly compatible with ZF WG180, WG200, WG92, and WG98 series transmissions. It is also used in select ZF Ecomat 4HP and 5HP variants that share the same housing bolt pattern. Always verify thread pitch and length against your specific transmission model. The screw works in conjunction with the CAP SCREW and SCREW PLUG to complete the housing fastening system.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | External hydraulic control block |
| 0501209818 | RANGE SELECTOR | Gear selection valve assembly |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing |
| 4660301018 | HOUSING | Secondary housing cover |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing |
| 0769123894 | TYPE PLATE | Identification tag |
| 4660221012 | SUCTION TUBE | Oil intake pipe |
| 0634100317 | O-RING | Seal for hydraulic ports |
| 0636103273 | CAP SCREW | Cover fastener |
| 0750100022 | SCREW PLUG | Drain/fill port plug |
