09158700 – Transaxle ZT-3100 LH (Genuine Ariens / Gravely OEM Part) The 09158700 ZT-3100 Left-Hand Transaxle is a genuine Ariens / Gravely OEM hydrostatic drive unit designed to deliver smooth, reliable power transfer and precise ground speed control on zero-turn mowers. This left-hand (LH) transaxle integrates the hydrostatic pump and drive motor into a single compact assembly for efficient performance and durability. Built to original Ariens / Gravely specifications and utilizing the proven Hydro-Gear ZT-3100 platform, this transaxle ensures consistent traction, responsive control, and long service life in demanding residential and commercial mowing conditions. Product Details Part Number: 09158700 Description: Transaxle – ZT-3100, Left Hand (LH) Component Type: Hydrostatic transaxle / drive unit Manufacturer Platform: Hydro-Gear ZT-3100 Orientation: Left-hand (LH) OEM Status: Genuine Ariens / Gravely replacement part Condition: New Key Benefits Provides smooth hydrostatic drive and speed control Integrated pump and motor for compact, efficient design Heavy-duty construction for extended service life Maintains correct left-side drive performance Direct OEM replacement for exact fit and reliability Applications Commonly used as the left-hand drive transaxle on Ariens and Gravely zero-turn mowers equipped with Hydro-Gear ZT-3100 systems. Applications typically include mid- to heavy-duty ZT and ZT XL series models. (Always verify correct left-hand / right-hand orientation and confirm compatibility using your model and serial number before ordering.) Replacing a worn or damaged transaxle with the 09158700 Ariens / Gravely OEM ZT-3100 LH transaxle helps restore smooth operation, consistent tracking, and dependable performance, keeping your mower operating at peak efficiency.
