Overview
The ZF 0659.055.295 CONTACT BUSH is a critical electrical interface component engineered for the WG 65 Series transmission family. This OEM genuine part, identified by SKU 0659.055.295, serves as the conductive bridge between the transmission control unit and internal solenoid circuits. Positioned within the valve body assembly, it ensures reliable signal transmission for precise clutch modulation and shift timing. The contact bush interfaces directly with the 4616101101: TRANSMISSION HOUSING to maintain proper grounding and electrical continuity under high-vibration conditions.
Symptoms of Failure
When the ZF 0659.055.295 contact bush deteriorates, operators often encounter intermittent transmission response issues. Common failure indicators include:
- Erratic gear engagement – The transmission hesitates or slips when shifting between forward and reverse, particularly under load.
- Intermittent electrical faults – Diagnostic trouble codes (DTCs) for solenoid circuit malfunctions appear without physical wiring damage.
- Delayed shift patterns – Upshifts become sluggish or harsh as the control module receives corrupted voltage signals from the bush.
- Transmission warning lamp activation – The dash indicator illuminates due to resistance spikes in the contact path, often misdiagnosed as a sensor failure.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0659.055.295 |
| Material | Brass alloy with silver-plated contact surface |
| Outer Diameter | 18.5 mm |
| Inner Diameter | 8.2 mm |
| Height | 12.0 mm |
| Weight | 22 grams |
| OEM Reference | ZF 0659.055.295 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This contact bush is specifically validated for the ZF WG 65 Series transmissions, including models WG65, WG80, WG120, WG150, WG180, and WG200. It is a direct replacement for units where the original bush has suffered electrical erosion or mechanical wear. The part integrates with the 0636011118: HEXAGON SCREW for secure mounting within the valve body. Additionally, it works in conjunction with the 4616301304: HOUSING and 4616301309: HOUSING to form a sealed electrical pass-through assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101101 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0636011118 | HEXAGON SCREW | Fastener for valve body attachment |
| 4616301304 | HOUSING | Intermediate housing for clutch pack |
| 4616301309 | HOUSING | Rear housing for output shaft support |
| 0630361069 | SEALING CAP | Protects electrical connector from debris |
| 0636011038 | HEXAGON SCREW | Mounting screw for solenoid bracket |
| 0636016015 | HEXAGON SCREW | Bolt for oil pump cover |
| 0631306085 | CYLINDRICAL PIN | Alignment pin for valve body |
| 0634313118 | O-RING | Seals hydraulic passageways |
| 0636304019 | SCREW PLUG | Closes oil drain port |
