Overview
The ZF 0736.010.840 TORX SCREW is a critical OEM genuine fastener engineered for the high-torque environment of ZF WG100, WG130, and WG131 transmissions. This bolt secures the HOUSING assembly to the main casing, ensuring precise clamping force for the GEAR SHAFT and PLANET CARRIER components. As a genuine ZF part, SKU 0736.010.840 guarantees the exact metallurgy and thread pitch required to prevent fastener fatigue under continuous load cycles. Without this screw, the entire BASIC PARTS assembly cannot maintain its structural integrity.
Symptoms of Failure
- Transmission fluid seepage at housing seam: A loose or fatigued TORX screw allows the housing to separate slightly, causing oil to weep from the mating surface. This is often misdiagnosed as a gasket failure.
- Audible clicking or knocking during gear engagement: When the screw loses preload, the planet carrier shifts axially, producing a metallic click under load changes.
- Gradual gear slipping under heavy torque: Insufficient clamping force permits the gear shaft to micro-move, leading to intermittent power loss in higher gears.
- Vibration at highway speeds: A broken or stripped screw allows the inner disk carrier to wobble, transmitting vibration through the driveline.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0736.010.840 |
| Type | TORX Drive Screw (M8 x 1.25) |
| Overall Length | 40 mm |
| Thread Length | 30 mm |
| Head Diameter | 14 mm |
| Material | High-tensile steel (10.9 grade), zinc-plated |
| Weight | 0.025 kg (0.055 lbs) |
| OEM Reference | ZF 0736.010.840 |
| Torque Specification | 45 Nm + 90° angle |
Compatibility
This TORX screw is specifically designed for the ZF WG series of powershift transmissions. It is a direct fit for the following models: WG100, WG130, WG131. It also applies to the WG180 and WG200 series when used in the housing-to-planet carrier interface. Always verify thread engagement depth; this screw is not interchangeable with standard hex bolts due to the TORX drive requirement for precise torque control.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699100023 | BASIC PARTS | Core assembly kit for transmission rebuild |
| 4699300138 | HOUSING | Main transmission casing |
| 4699300156 | GEAR SHAFT | Input/output torque transfer shaft |
| 4699300127 | PLANET CARRIER | Planetary gear support structure |
| 4699300098 | INNER DISK CARRIER | Clutch disk hub assembly |
| 4699200011 | RING GEAR | Stationary gear ring for planetary set |
| 4699300152 | TOOTHED DISK | Friction disk for clutch pack |
| 4699300153 | RING GEAR | Secondary ring gear for output |
| 4699300154 | RING | Snap ring or retaining ring |
| 4699300128 | PLANETARY GEAR | Individual planet gear pinion |
