ZF 4699.827.027 GP27 | OEM Genuine Part

Overview

The ZF 4699.827.027 GP27 is a critical planetary gearset assembly engineered for high-torque applications in construction machinery transmissions. This OEM genuine part sits within the main drive train of ZF’s heavy-duty powershift gearboxes, specifically functioning as the intermediate reduction stage between the input shaft and the output shaft. The SKU 4699.827.027 designates a factory-matched gearset cluster that ensures precise tooth engagement and load distribution under extreme operating conditions. When installed alongside the 4699025171 GP25, it forms a complete planetary carrier assembly that manages torque multiplication during low-speed, high-draw operations like excavating or grading.

Symptoms of Failure

• Intermittent gear slipping under load: When the GP27 planetary set wears, operators notice sudden loss of drive power when climbing grades or pushing heavy loads, often accompanied by a whining noise from the transmission housing.
• Metallic debris in transmission fluid: Pitting or spalling on the GP27 gear teeth generates fine steel particles that contaminate the hydraulic circuit, detectable during routine oil changes or filter inspections.
• Delayed engagement in forward gears: Worn planetary pinions cause a hesitation of 2-3 seconds when shifting from neutral to drive, as the clutch packs struggle to synchronize with the damaged gearset.
• Vibration through the chassis: Uneven wear on the GP27 carrier creates harmonic oscillations at specific RPM ranges, felt as a shudder through the operator seat during acceleration.

Technical Specifications

Compatibility

This GP27 gearset is specifically designed for ZF WG180, WG200, and WG250 series powershift transmissions commonly found in wheel loaders, bulldozers, and telescopic handlers. It also fits select models of the ZF Ergopower and Ecolife ranges used in construction machinery. The part interfaces directly with the 4699101153 HOUSING and the 4699102106 INPUT shaft assembly. For complete driveline restoration, pairing this GP27 with the 4699103123 OUTPUT component ensures proper alignment and load distribution across the entire planetary stage.

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