Overview
The ZF 4143.334.008 PIN is a precision-machined locating and alignment component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine pin serves as a critical pivot or positioning element within the valve body and housing assembly, ensuring accurate gear shift actuation and hydraulic circuit alignment. The SKU 4143.334.008 is manufactured to ZF’s exacting tolerances to prevent lateral movement of adjacent components during high-torque operation. It is commonly installed alongside the 4143101009 HOUSING and the 4143301025 HOUSING to maintain structural integrity in the transmission’s control module.
Symptoms of Failure
- Erratic gear engagement or delayed shifting: A worn or sheared 4143.334.008 pin can cause misalignment of the shift rail, leading to inconsistent clutch pack engagement.
- Hydraulic fluid seepage around the valve body: When this pin loosens, it can compromise the seal between the 0634313603 O-RING and the housing, resulting in visible oil leaks.
- Unusual metallic rattling from the transmission sump: A fractured pin may break free and circulate within the oil pan, producing audible debris noise during operation.
- Intermittent loss of drive in forward gears: Pin failure in the WG130 series often mimics a failing solenoid, as the valve body loses its positional reference.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4143.334.008 |
| Material | Case-hardened alloy steel (DIN 1.7131) |
| Overall Length | 38.5 mm |
| Diameter (Shank) | 8.0 mm |
| Weight | 12 grams |
| Surface Finish | Zinc-plated (ISO 2081) |
| OEM Reference | ZF 4143.334.008 |
| Hardness | HRC 58-62 |
Compatibility
This pin is a direct OEM replacement for the following ZF transmission models: WG100, WG130, WG131, WG180, WG200, and HL 270 Series. It is also used in the HL 100 Series final drive assemblies. The 4143.334.008 pin interfaces with the 4475280018 SCREW PLUG and the throttle valve linkage in the WG200 series. For complete rebuilds, pair this pin with the 4143298457 SEAL KIT to ensure all mating surfaces are protected.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101009 | HOUSING | Main valve body housing for WG100 series |
| 4143301025 | HOUSING | Secondary housing for HL 270 series |
| 0634313603 | O-RING | Seals pin bore against fluid leakage |
| 4475280018 | SCREW PLUG | Locks pin in position within the housing |
| 0501342341 | SUPPORT RING | Distributes load around the pin bore |
| 4143298457 | SEAL KIT | Complete gasket set for valve body rebuild |
| 0634313591 | O-RING | Secondary seal for high-pressure circuits |
| 0636101068 | CAP SCREW | Fastens the housing to the transmission case |
| 4143221013 | THROTTLE VALVE | Regulates hydraulic pressure based on throttle position |
| 0634304484 | O-RING | Seals the throttle valve bore |
