Hydro-Gear ZS-GKEF-9T7B-11RX Hydrostatic Transaxle - ZT-3400

The Hydro-Gear ZS-GKEF-9T7B-11RX is a genuine OEM ZT-3400 hydrostatic transaxle designed for mid-sized commercial zero-turn mowers and lawn equipment. This commercial-grade integrated transmission delivers truck-like performance while maintaining exceptional maneuverability in tight spaces, making it ideal for professional landscaping applications.

Key Features:

• High-efficiency 12cc variable displacement pump with seven-piston design
• Powerful 16cc fixed displacement motor for superior torque and durability
• Durable 1-1/8 inch (1.125") diameter axle shaft rated for heavier loads
• Performance Package includes shock valves for extended system life and protection
• Cut steel gears for maximum durability in demanding applications
• Integrated charge pump for consistent hydraulic pressure
• External oil filter for easy maintenance and serviceability
• Rated for equipment weights up to 1,600 lbs in commercial settings
• Optional internal expansion tank for simplified installation
• Available with multiple axle end configurations (tapered, 4-bolt, or 5-bolt flange)

This genuine Hydro-Gear transaxle combines efficient hydraulic power transmission with reliable, quiet operation. The ZT-3400 series is engineered to deliver consistent performance in commercial environments while minimizing vibration and noise pollution. Oil capacity is approximately 72 fluid ounces for optimal lubrication and cooling.