ZF 4657.183.122 LOOSE PARTS for WG210 | OEM Genuine Part

Overview

The ZF 4657.183.122 LOOSE PARTS kit is a critical service component engineered specifically for the WG 210 series transmission. This genuine OEM assembly contains the necessary fasteners, seals, and positioning elements required to secure internal hydraulic circuits and structural housings during a rebuild or overhaul. Designated as SKU 4657.183.122, this loose parts set ensures that all small but vital hardware—such as locating pins and retaining clips—are replaced to factory tolerances, preventing fluid bypass and maintaining clutch pack alignment. When paired with a new TRANSMISSION HOUSING, this kit guarantees a leak-free interface between the main casing and the valve body.

Symptoms of Failure

• Intermittent gear slippage under load: Worn or missing loose parts can allow the HOUS.FRONT SECT to shift slightly, causing pressure loss in the forward clutch circuit.
• External oil seepage at housing joints: Degraded seals within the 4657.183.122 kit lead to visible fluid trails around the HOUSING REAR PART mating surface.
• Metallic rattling from the bell housing: A missing CYLINDRICAL PIN allows the pump drive gear to oscillate, producing a distinct chatter during idle.
• Delayed engagement when shifting from Neutral to Drive: Internal hardware looseness reduces pilot pressure, causing a 2–3 second lag before the transmission responds.

Technical Specifications

Compatibility

This genuine ZF 4657.183.122 LOOSE PARTS kit is designed for the WG 210 series but is also compatible with the WG 180 and WG 200 transmission families that share the same hydraulic control architecture. It directly interfaces with the TRANSMISSION HOUSING and the HOUS.FRONT SECT. For complete assembly, ensure the HOUSING REAR PART is free of corrosion, and verify that the CYLINDRICAL PIN is fully seated to prevent oil feed misalignment. This kit is not intended for use in the older WG 120 series without additional adapter components.

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