ZF 4657.183.404 LOOSE PARTS for WG190 | OEM Genuine Part

Overview

The ZF 4657.183.404 LOOSE PARTS kit is a critical service component engineered specifically for the WG 190 Series transmission. This genuine OEM assembly contains the necessary fasteners, seals, and positioning elements required to secure internal sub-assemblies within the gearbox housing. Positioned between the main casing and the rear section, this kit ensures that the TRANSMISSION HOUSING maintains proper alignment with the rotating clutch packs and planetary gears. The SKU 4657.183.404 is factory-specified for rebuilds where original clamping force and vibration resistance must be restored to OEM tolerances.

Symptoms of Failure

• Oil weeping from housing seams: When the LOOSE PARTS kit loses its sealing integrity, pressurized transmission fluid escapes between the HOUS.FRONT SECT and the main body, leaving visible drips on the bell housing.
• Intermittent gear slippage under load: Worn fasteners within this kit allow micro-movement of the HOUSING REAR PART, causing clutch pack clearance to shift and resulting in delayed engagement.
• Abnormal driveline vibration: Loose retaining components permit the HOUSING REAR SECTION to resonate against the main case, producing a low-frequency shudder during acceleration.
• Hard shifting between forward gears: Misalignment from degraded LOOSE PARTS alters the valve body-to-housing geometry, leading to harsh upshifts and erratic downshifts in the WG190.

Technical Specifications

Compatibility

This LOOSE PARTS kit is designed for the ZF WG 190 Series, but its fastening geometry also applies to the WG180 and WG200 variants due to shared housing bolt patterns. It is compatible with both the standard WG190 and the WG190 Ecomat versions. The kit directly interfaces with the TRANSMISSION HOUSING and the HOUS.FRONT SECT on all WG-series transmissions manufactured after 2004. Always verify the housing casting number before installation.

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