Hydro-Gear ZU-GPEB-SCLB-21LX Hydrostatic Transaxle – ZT-340 OEM Replacement

The Hydro-Gear ZU-GPEB-SCLB-21LX Hydrostatic Transaxle (ZT-340) is a genuine OEM drive system component engineered to deliver smooth, responsive, and reliable performance for zero-turn mowers and lawn equipment. Designed and manufactured by Hydro-Gear, a leading OEM supplier for mower drive systems, this transaxle meets strict factory specifications to ensure proper fitment and long-term durability.

Built for demanding mowing conditions, the ZT-340 hydrostatic transaxle provides consistent torque delivery, precise speed control, and efficient power transfer. Its hydrostatic design eliminates the need for manual gear shifting, allowing operators to experience seamless acceleration, tighter maneuverability, and improved overall control—especially in commercial or high-use environments.

Manufactured with high-quality internal components and tight tolerances, this transaxle helps reduce wear on critical drivetrain parts while maintaining optimal system efficiency. Whether you are replacing a worn unit or restoring performance to your mower, the ZU-GPEB-SCLB-21LX is designed to meet the demands of both professional landscapers and residential users.

For proper ordering, always verify your mower’s model number, serial number, and transmission ID plate before purchasing. Because this is a precision-matched OEM component, confirming compatibility is essential.

This is a special order item and is non-returnable. If you need assistance confirming fitment, contact Carroll Stream Motor Company at (248) 628-4638 prior to ordering.

Key Features

• Genuine Hydro-Gear OEM hydrostatic transaxle
• ZT-340 model designed for zero-turn mower applications
• Smooth hydrostatic drive for precise speed and direction control
• Heavy-duty construction for extended operation and high-load conditions
• Improves maneuverability, efficiency, and overall mower performance
• Built to meet original factory specifications for reliable fitment

Product Specifications

• Part Number: ZU-GPEB-SCLB-21LX
• Model: ZT-340
• Manufacturer: Hydro-Gear
• Condition: New OEM
• Category: Hydrostatic Transaxle / Drive System Component

Please call one of our specialists at (248) 628-4638 prior to ordering if needed to ensure this will work with your equipment as we do not accept returns on special order parts. Thank you.

Frequently Asked Questions

Is the Hydro-Gear ZU-GPEB-SCLB-21LX a genuine OEM transaxle?

Yes. This is a genuine Hydro-Gear OEM hydrostatic transaxle designed to meet original factory specifications.

What is the ZT-340 transaxle used for?

The ZT-340 is used in zero-turn mowers and lawn equipment that require smooth hydrostatic drive performance and consistent power delivery.

What does a hydrostatic transaxle do?

A hydrostatic transaxle combines the transmission and axle into one unit, allowing for smooth, gearless speed control and responsive directional changes.

Why is hydrostatic drive beneficial for mowers?

Hydrostatic systems provide:

• Smooth acceleration and deceleration
• Precise speed control
• Improved maneuverability
• Reduced mechanical wear compared to traditional gear systems

How do I confirm this transaxle will fit my mower?

You should verify:

• Mower model number
• Serial number
• Transmission ID plate

Matching these ensures proper compatibility.

What happens if I install the wrong transaxle?

Installing an incorrect transaxle can lead to poor performance, improper fitment, or damage to your mower’s drive system.

Is this a special order part?

Yes. This is a special order item and is non-returnable, so compatibility should be confirmed before purchase.

Who can help confirm fitment?

You can contact Carroll Stream Motor Company at (248) 628-4638 for assistance before ordering.