ZF 4651.199.041 LOOSE PARTS for WG100 | OEM Genuine Part

Overview

The ZF 4651.199.041 LOOSE PARTS assembly is a critical service kit designed for the WG 100 series transmission. This OEM genuine part, identified by SKU 4651.199.041, contains the necessary fasteners, seals, and small hardware required to secure and seal the TRANSMISSION HOUSING and internal components during a rebuild or overhaul. Without this kit, the structural integrity of the gear train is compromised, leading to potential fluid migration and mechanical misalignment. It sits directly within the main casing interface, ensuring that all loose hardware meets ZF’s exacting torque and material standards for long service life.

Symptoms of Failure

When the components within the 4651.199.041 kit degrade, operators often notice specific failure modes. Transmission fluid seepage at the housing joint is a primary indicator, often caused by a compromised O-RING or worn sealing cap. Another common symptom is intermittent gear slippage under load, which occurs when loose fasteners allow the HOUSING to shift slightly, altering clutch pack clearances. You may also hear rattling or vibration from the bell housing area, signaling that retaining hardware has fatigued. Finally, erratic shift timing can result from debris entering the valve body through a failed seal, a direct consequence of missing or damaged parts from this kit.

Technical Specifications

Compatibility

This loose parts kit is engineered for the ZF WG 100 series, but its hardware is also utilized in the WG 180 and WG 200 models due to shared housing architectures. It is directly compatible with the HOUSING variant found in later WG 100 revisions. For complete assembly, ensure you also verify the condition of the SCREEN SHEET and SCREEN SHEET filters, which are often replaced concurrently. The kit is not backward-compatible with pre-1990 WG models without adapter hardware.

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