ZF 4644.199.333 LOOSE PARTS for WG180 | OEM Genuine Part

Overview

The ZF 4644.199.333 LOOSE PARTS kit is a critical service component designed specifically for the WG 180 series transmission. This genuine OEM assembly consolidates essential wear items that maintain hydraulic integrity and mechanical alignment within the gear train. As a loose parts set, it includes the necessary fasteners, seals, and positioning elements that secure internal assemblies against vibration and thermal cycling. The SKU 4644.199.333 is engineered to match factory tolerances, ensuring that when installed alongside the 4644101223: TRANSMISSION HOUSING or the 4644301225: TRANSMISSION HOUSING, the entire drivetrain maintains its designed pressure curves and shift timing.

Symptoms of Failure

• Intermittent gear slippage under load: When the loose parts wear, internal clearances increase, causing the clutch packs to lose clamping force during heavy torque application.
• External oil seepage at housing joints: Degraded seals within the 4644.199.333 kit allow transmission fluid to weep past mating surfaces, often visible as dark streaks on the bell housing.
• Erratic shift quality or delayed engagement: Worn positioning components disrupt the precise alignment of the shift rail, leading to harsh or delayed gear changes, especially in cold oil conditions.
• Increased driveline vibration: Loose fasteners or degraded spacers permit micro-movement of internal assemblies, transmitting vibration through the 0730365125: TYPE PLATE and into the chassis.

Technical Specifications

Compatibility

This loose parts kit is primarily validated for the ZF WG 180 series transmissions used in medium-duty trucks and industrial equipment. It also fits the WG 200 series with minor adapter modifications, as the internal bolt patterns and seal grooves share common geometry. The kit is not recommended for WG 150 or WG 250 variants without consulting the 4644301298: COVER PLATE specifications. Always verify the housing casting number—if your unit uses the 4644101223 or 4644301225 housing, this kit provides direct interchangeability.

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