ZF 4644.199.957 LOOSE PARTS for WG201 | OEM Genuine Part

Overview

The ZF 4644.199.957 LOOSE PARTS for WG201 is a critical service kit designed to restore the integrity of your ZF WG 201 series transmission. This OEM genuine part, identified by SKU 4644.199.957, contains the essential fasteners, seals, and small hardware components that secure the transmission housing and internal assemblies. Without this kit, the structural cohesion of the gearbox is compromised, leading to fluid migration and mechanical instability. It sits directly within the main casing assembly, interfacing with the TRANSMISSION HOUSING and the TRANSMISSION HOUSING to ensure a leak-proof, vibration-resistant fit.

Symptoms of Failure

When the 4644.199.957 LOOSE PARTS kit degrades or is missing, operators will notice distinct operational issues. Watch for these specific failure symptoms:

• Transmission oil leaks at the housing seam: Worn or missing fasteners cause the housing halves to separate, allowing ATF to weep out under pressure.
• Gear slipping under load: Loose hardware allows internal components to shift, disrupting gear engagement and causing intermittent power loss.
• Abnormal vibration or rattle: Unsecured parts within the assembly create audible noise, especially during acceleration or deceleration.
• Contaminated fluid from external debris ingress: A compromised seal, often due to a failed SEALING RING, allows dirt and moisture to enter the gearbox.

Technical Specifications

Compatibility

This LOOSE PARTS kit is engineered for the ZF WG 201 series, but its hardware is shared across several heavy-duty transmission models. It is fully compatible with the WG180, WG200, and WG211 series. The kit also integrates seamlessly with the SCREW PLUG for drain/fill ports and the COVER PLATE for final drive access. Always verify your transmission serial number before ordering.

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