Overview
The ZF 0636.101.176 CAP SCREW is a critical fastening component engineered specifically for the WG100, WG130, and WG131 transmission series. This OEM genuine part secures the 4699101046: HOUSING assembly, ensuring proper clamping force and alignment within the gearbox. Positioned at the interface between the main casing and the 4699301109: HOUSING, this cap screw prevents relative movement under high torque loads. The SKU 0636.101.176 is manufactured to ZF’s exacting tolerances, guaranteeing a precise fit that maintains oil seal integrity and drivetrain stability.
Symptoms of Failure
- Transmission oil seepage at housing joints: When the cap screw loosens or fatigues, the seal between the 4699301017: BEARING COVER and the housing degrades, leading to visible fluid trails.
- Audible clicking or knocking during gear shifts: A worn 0636.101.176 allows micro-movement of the 4699301085: COVER, creating metallic contact under load.
- Increased vibration from the transmission bell housing: Loss of clamping force permits harmonic resonance, especially at highway speeds.
- Difficulty engaging reverse or low gears: Misalignment caused by a failing cap screw can shift internal clearances, affecting shift fork travel.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0636.101.176 |
| Thread Size | M10 x 1.5 |
| Overall Length | 35 mm |
| Head Type | Hexagon socket (Allen) |
| Material | Alloy steel, 10.9 grade |
| Surface Finish | Zinc-plated, yellow passivated |
| Weight | 0.032 kg |
| OEM Reference | ZF 0636.101.176 |
| Torque Specification | 45 Nm + 90° angle |
Compatibility
This cap screw is directly compatible with ZF WG100, WG130, and WG131 transmissions. It also fits select variants of the WG180 and WG200 series where the housing interface uses the same bolt pattern. Always verify the thread pitch and length against your specific transmission model. The 0636.101.176 is frequently replaced alongside the 0634303141: O-RING and 0734307407: PROTECTION CAP during overhaul procedures.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101046 | HOUSING | Main transmission casing section |
| 4699301109 | HOUSING | Intermediate housing for gear cluster |
| 4699301017 | BEARING COVER | Seals and supports output bearing |
| 4699301085 | COVER | Access cover for valve body |
| 4699301014 | THREAD PROTECTIVE SHIELD | Prevents thread damage during assembly |
| 0634303141 | O-RING | Seals cap screw bore against oil leaks |
| 0734307407 | PROTECTION CAP | Covers exposed threads during transport |
| 0634309600 | SHAFT SEAL | Prevents fluid egress at rotating shafts |
| 0637885612 | BREATHER | Equalizes internal pressure |
| 0636102023 | CAP SCREW | Alternate fastener for adjacent mounting points |
