ZF 4657.183.354 LOOSE PARTS for WG190 | OEM Genuine Part

Overview

The ZF 4657.183.354 LOOSE PARTS kit is a critical service component designed specifically for the WG 190 series transmission. This genuine OEM assembly includes all necessary fasteners, seals, and positioning elements required to secure the main housing sections during a rebuild or overhaul. The SKU 4657.183.354 sits at the structural core of the transmission, ensuring that the TRANSMISSION HOUSING remains properly aligned with the HOUS.FRONT SECT and the HOUSING REAR PART. Without this loose parts set, the entire gear train can shift out of tolerance, leading to premature wear on internal components.

Symptoms of Failure

• Oil leaks at housing mating surfaces – When the loose parts kit degrades, the seal between the HOUSING REAR SECTION and the main body fails, causing transmission fluid to weep externally.
• Gear slipping under load – Worn fasteners or missing positioning pins allow the housing sections to shift, misaligning the planetary gear sets and causing intermittent power loss.
• Abnormal vibration during shifting – Loose housing bolts create micro-movement in the assembly, transmitting vibration through the driveline during gear changes.
• Increased operating noise – A failing loose parts kit results in metallic rattling or humming from the transmission case as components lose their rigid mounting points.

Technical Specifications

Compatibility

This genuine ZF loose parts kit is engineered for the WG 190 series transmission. Based on the part type and housing geometry, it is also compatible with the WG 180 and WG 200 models that share the same split-housing architecture. The kit works in conjunction with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to maintain structural integrity. For WG 210 variants, verify the bolt pattern matches the HOUSING REAR PART before installation.

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