ZF 4657.172.028 COUPLING for WG 190/WG 210 | OEM Genuine Part

Overview

The ZF 4657.172.028 COUPLING is a critical torque-transfer component engineered specifically for the WG 190 and WG 210 series transmissions. This OEM genuine part sits between the transmission housing and the front section assembly, ensuring precise rotational alignment and dampening torsional vibrations during gear shifts. As a direct-fit replacement, the SKU 4657.172.028 restores factory-specified driveline integrity and prevents premature wear on adjacent components such as the TRANSMISSION HOUSING and the HOUS.FRONT SECT. Without this coupling, the transmission cannot maintain consistent power flow under heavy industrial loads.

Symptoms of Failure

• Oil seepage at the coupling housing interface: When the 4657.172.028 coupling loses its sealing integrity, transmission fluid begins to weep from the joint between the HOUSING REAR PART and the main case, leading to low fluid levels and eventual gear slipping.
• Audible clunking during gear engagement: A worn coupling creates excessive backlash, producing a metallic clunk sound when shifting from neutral to drive or reverse—a classic sign of coupling fatigue in WG 190 and WG 210 units.
• Vibration through the chassis at highway speeds: Degraded damping properties cause harmonic vibrations that resonate through the driveline, often misdiagnosed as a failing HOUSING REAR SECTION.
• Intermittent loss of power to wheels: As the coupling splines wear, torque transmission becomes inconsistent, resulting in momentary power loss under acceleration—particularly noticeable in BP 210 and BP 230 series applications.

Technical Specifications

Compatibility

This coupling is engineered for the ZF WG 190 and WG 210 series, and is also fully compatible with the BP 210 and BP 230 series transmissions. It directly replaces the original coupling in WG180, WG200, and WG210 models manufactured after 2012. For correct installation, always verify the spline count matches your specific TRANSMISSION HOUSING variant. The coupling also interfaces with the HOUS.FRONT SECT and the HOUSING REAR PART to form a complete torque path.

Related Components

Frequently Asked Questions

Q: Can the 4657.172.028 coupling be installed without removing the transmission from the vehicle?
A: In most WG 190 and WG 210 applications, the coupling is accessible after removing the rear housing section. However, for BP 230 series transmissions, partial transmission removal is often required to access the coupling bolts.

Q: How do I confirm this coupling fits my specific ZF transmission?
A: Measure the spline bore diameter (28 mm) and count the spline teeth. This coupling uses a 12-tooth internal spline. Cross-reference with your transmission’s serial number plate—if it lists WG190, WG210, BP210, or BP230, this part is compatible.

Q: What torque specification should I use for the cap screws securing this coupling?
A: ZF recommends 85 Nm (63 ft-lbs) for the M10 cap screws (part 0636100803) when fastening the coupling to the housing. Always use new locking compound and replace the O-ring during installation.