ZF 4699.804.132 GK25 | OEM Genuine Part

Overview

The ZF 4699.804.132 GK25 is a precision-engineered gear set assembly designed for heavy-duty construction machinery transmissions. This OEM genuine part functions as a primary reduction gear within the planetary gear train, directly influencing torque multiplication and rotational speed control. Positioned between the input shaft and the output carrier, the SKU 4699.804.132 ensures smooth power transfer under extreme load conditions. When paired with the 4699004103: GK25 companion component, this assembly maintains the structural integrity required for excavators, wheel loaders, and crawler dozers operating in demanding environments.

Symptoms of Failure

• Intermittent gear slipping under load: Worn teeth on the 4699.804.132 cause momentary loss of drive torque, particularly when climbing grades or lifting heavy loads. This manifests as a sudden RPM surge without corresponding vehicle movement.
• Metallic grinding noise from transmission housing: Pitting or spalling on gear flanks produces a distinct high-pitched whine that escalates to grinding as debris contaminates the lubricant. Operators often report this sound intensifying during direction changes.
• Oil contamination with ferrous particles: Accelerated wear generates fine metallic shavings visible in the transmission fluid. This symptom frequently accompanies degraded performance of the 4699101098: HOUSING seal interfaces.
• Delayed engagement or harsh shifting: Excessive backlash from gear wear disrupts hydraulic clutch timing, causing jarring shifts or hesitation when selecting forward/reverse gears.

Technical Specifications

Compatibility

This gear set is engineered for ZF WG series powershift transmissions commonly used in construction machinery. Verified compatible models include the WG180, WG200, WG210, and WG250 series. The 4699.804.132 also integrates with the 4699102146: INPUT shaft assembly and 4699103026: OUTPUT flange in 6-speed configurations. For optimal performance, always replace the mating 4699004103: GK25 countergear simultaneously to prevent accelerated wear patterns.

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