ZF 4657.199.005 LOOSE PARTS for WG190 | OEM Genuine Part

Overview

The ZF 4657.199.005 LOOSE PARTS kit is a critical service package designed specifically for the WG 190 series transmission. This assembly contains the essential loose components required to maintain proper clutch pack engagement and hydraulic circuit integrity within the transmission’s main valve body and rotating clutch assemblies. As an OEM genuine part, the SKU 4657.199.005 ensures that every washer, snap ring, and seal matches the original factory tolerances, preventing premature wear and fluid bypass. This kit is typically installed during a major overhaul or when addressing internal clearance issues, and it works in concert with the TRANSMISSION HOUSING to anchor the rotating assembly securely.

Symptoms of Failure

When the components within the ZF 4657.199.005 LOOSE PARTS kit begin to degrade, operators will notice distinct performance issues. Delayed or harsh shifting is a primary indicator, as worn snap rings or thrust washers allow clutch packs to lose their precise axial clearance. Another common symptom is intermittent gear slippage under load, particularly in higher gears, caused by loose parts failing to maintain proper hydraulic pressure against the clutch pistons. You may also observe metallic debris in the transmission oil pan during routine maintenance, signaling that a retaining ring or washer has fractured. Finally, unusual vibration or driveline shudder during acceleration can occur when these loose parts no longer stabilize the shaft assembly within the HOUS.FRONT SECT.

Technical Specifications

Compatibility

This LOOSE PARTS kit is engineered primarily for the ZF WG 190 series, but its application extends to closely related models within the same family. It is fully compatible with the WG 180, WG 200, and WG 210 transmissions, provided the HOUSING REAR PART and front section are from the same generation. The kit also integrates with the CYLINDRICAL PIN used for alignment during assembly. For off-highway and industrial vehicles using the WG platform, this part ensures the clutch pack stack height remains within factory limits, preventing internal contact with the HOUS.FRONT SECT.

Related Components

Frequently Asked Questions

Q: Can I reuse the old snap rings from my previous rebuild instead of buying the 4657.199.005 kit?
No. ZF specifies that all retaining rings and thrust washers in this kit are single-use components. Reusing them can lead to loss of preload, resulting in the exact failure symptoms described above, such as gear slippage and metallic debris generation.

Q: Does this kit include the gaskets for the housing flanges?
This particular LOOSE PARTS kit focuses on internal clutch retention components. For housing gaskets, you will need to order the TRANSMISSION HOUSING seal kit separately. The kit does include the CYLINDRICAL PIN for alignment.

Q: How do I verify that the 4657.199.005 is the correct kit for my WG190 transmission?
Check the serial number plate on your transmission. If the model line is WG190, WG180, or WG200 with a build date after 2010, this kit is compatible. Always cross-reference the HOUSING REAR PART number to ensure the rear section matches the kit’s snap ring groove dimensions.