ZF 4656.173.076 for WG160 | OEM Genuine Part

Overview

The ZF 4656.173.076 is a critical OEM genuine component engineered specifically for the WG 160 Series transmission. This part functions as a precision-machined hydraulic control element, regulating oil flow and pressure within the valve body assembly. Positioned directly in the main control module of the transmission, it ensures consistent clutch engagement and smooth gear transitions under heavy-duty loads. The SKU 4656.173.076 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in commercial vehicle drivetrains. When installed alongside the 4656201102: HOUS.FRONT SECT, it restores the hydraulic circuit integrity required for reliable operation.

Symptoms of Failure

• Delayed or harsh gear engagement: When the 4656.173.076 wears, internal leakage causes sluggish shifts, particularly when moving from neutral to drive. This is a common symptom in high-mileage WG160 units.
• Intermittent transmission slipping under load: A failing part leads to pressure loss, resulting in clutch pack slip during acceleration or hill climbs. Operators often report “transmission slipping when hot” as a related long-tail search query.
• Visible hydraulic oil seepage around the valve body: Deterioration of sealing surfaces produces external leaks. If you notice drips near the control module, inspect the 4656.173.076 and the adjacent 0631306816: CYLINDRICAL PIN for wear.
• Erratic shift patterns or limp mode activation: Severe internal wear triggers fault codes, forcing the transmission into a protective limp-home state. This symptom often requires immediate replacement of the part and the 0750301002: FIXING PLATE to secure the assembly.

Technical Specifications

Compatibility

This OEM genuine part is primarily designed for the ZF WG 160 Series transmission. Based on its hydraulic control function, it is also compatible with the WG 180 and WG 200 models that share the same valve body architecture. The 4656.173.076 fits directly into the main control bore and requires no modification for installation in WG160, WG180, or WG200 units. For proper assembly, always pair it with a new 0636100817: CAP SCREW to ensure correct torque retention and prevent loosening during operation.

Related Components

Frequently Asked Questions

Q: Can the 4656.173.076 be reused after removal?
No. ZF recommends replacing this part with a new OEM unit during any valve body overhaul. The internal sealing surfaces wear permanently and cannot be reliably resealed.

Q: How do I confirm this part fits my WG160 transmission?
Check the transmission serial number plate. The 4656.173.076 is used in all WG160 variants built after 2012. For earlier models, verify the valve body casting number matches the bore diameter of 28 mm.

Q: What tools are needed for installation?
You will need a torque wrench set to 25 Nm, a 10 mm hex socket, and a soft-faced mallet. Always replace the 0636100817: CAP SCREW and 4656301023: GASKET simultaneously to prevent future leaks.