ZF 4699.041.021 GK26LD | OEM Genuine Part

Overview

The ZF 4699.041.021 GK26LD is a genuine OEM gearshift housing assembly, a critical structural and guiding component within the upper valve body section of ZF powershift transmissions. This SKU 4699.041.021 serves as the mounting interface for the shift selector mechanism, ensuring precise alignment of the control spools. When paired with the 4699101086 HOUSING and the 4699301223 HOUSING, it forms the sealed hydraulic circuit that directs oil flow to the clutch packs. Without this part, the transmission cannot maintain proper gear engagement pressure.

Symptoms of Failure

• Erratic gear engagement or delayed shifting: Worn bores in the 4699.041.021 allow internal leakage, causing soft or delayed clutch application during direction changes.
• External oil seepage from the shift tower: Cracks or porosity in the housing lead to visible hydraulic fluid leaks around the selector area, often mistaken for a simple gasket failure.
• Transmission stuck in neutral or fails to hold a gear: Internal scoring prevents the shift rail from locking into position, resulting in a loss of drive under load.
• Increased metallic debris in the oil filter: Abrasion of the housing material generates fine aluminum particles that circulate through the system.

Technical Specifications

Compatibility

This genuine ZF GK26LD housing is engineered for the WG180, WG200, and WG211 series powershift transmissions commonly found in construction machinery such as wheel loaders, telehandlers, and graders. It is also compatible with certain variants of the 4WG-200 and 6WG-200 torque converter transmissions. Always verify the casting number against your existing assembly before ordering.

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