ZF 4644.183.037 LOOSE PARTS for WG201 | OEM Genuine Part

Overview

The ZF 4644.183.037 LOOSE PARTS for WG201 is a critical internal component designed for the WG 201 Series transmission. This OEM genuine part functions as a precision-engineered spacer or locating element within the gear train assembly, ensuring correct axial clearance and alignment of rotating shafts. By maintaining proper tolerances, the 4644.183.037 prevents metal-on-metal contact and reduces vibration during operation. As a loose part, it is typically replaced during a full transmission overhaul or when addressing specific wear patterns in the WG201. The SKU 4644.183.037 is manufactured to ZF’s original specifications, guaranteeing a direct fit and long service life when paired with related housing components such as the 4644101160 TRANSMISSION HOUSING or the 4644301323 TRANSMISSION HOUSING.

Symptoms of Failure

When the ZF 4644.183.037 LOOSE PARTS begins to wear or become damaged, operators may notice several distinct failure indicators. First, abnormal gear train noise—specifically a whining or grinding sound during acceleration—often points to this part losing its dimensional integrity. Second, intermittent gear slippage under load occurs when the spacer no longer maintains proper shaft positioning, causing misalignment in the clutch packs. Third, metal debris in the transmission oil filter is a common sign of this part fracturing, as small fragments circulate through the hydraulic system. Finally, difficulty engaging reverse gear can arise from insufficient axial play, a condition directly linked to a worn 4644.183.037. Addressing these symptoms early prevents secondary damage to the 4644301189 THREADED BUSH and other internal components.

Technical Specifications

Compatibility

This genuine ZF part is primarily designed for the WG 201 Series transmission family, which includes models such as the WG180, WG200, and WG211. It is also compatible with certain variants of the WG150 and WG250 where the same loose parts kit is specified. The 4644.183.037 is used in both on-highway truck applications and off-highway industrial equipment. For proper installation, always verify that the mating 4475280043 SCREW PLUG and associated seals are replaced simultaneously to ensure a leak-free assembly.

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