ZF 4699.001.238 GK10LD | OEM Genuine Part

Overview

The ZF 4699.001.238 GK10LD is an OEM genuine clutch pack assembly engineered for heavy-duty construction machinery transmissions. This critical component sits within the planetary gear set of ZF power shift transmissions, managing torque transfer between the input shaft and the output shaft during gear changes. The SKU 4699.001.238 is designed to withstand extreme thermal and mechanical loads found in wheel loaders, graders, and dozers. When installed alongside the 4699101108 HOUSING, it ensures precise hydraulic pressure distribution for smooth shifting under load.

Symptoms of Failure

• Delayed or harsh gear engagement: Worn friction discs in the 4699.001.238 cause sluggish shifting, especially when the transmission is cold. Operators notice a pronounced “clunk” when moving from neutral to forward.
• Torque converter overheating: Slipping clutches generate excess heat, leading to elevated transmission oil temperatures above 120°C (248°F). This often triggers warning lights on the dashboard.
• Oil contamination with metallic debris: As the GK10LD friction material degrades, fine bronze and steel particles appear in the transmission fluid, visible during routine oil changes.
• Loss of power in higher gears: The assembly fails to hold pressure, causing the transmission to slip under load in 3rd and 4th gears, reducing machine productivity by up to 30%.

Technical Specifications

Compatibility

This GK10LD clutch pack is primarily used in ZF WG180, WG200, and WG210 series transmissions found in construction machinery. It directly replaces the earlier 4699.001.237 variant. The assembly is compatible with models featuring a 10-inch clutch diameter and 6-spline hub configuration. Always verify the 0501329881 HOUSING COVER and 0630513065 SNAP RING are in good condition during installation, as these retain the clutch pack in the housing. The 0634306309 O-RING must also be replaced to prevent hydraulic fluid bypass.

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