AM143310 Mower Gear Case Gearbox For John Deere 425 445 455 w/ 48" 54" 60" Decks

Mower Gear Case Gearbox for John Deere

Replacement Mower Gear Case Gearbox AM143310 for John Deere 425, 445, and 455 lawn tractors with 48-inch, 54-inch, and 60-inch mower decks transfers power from the engine to the cutting blades.

Overview

The Mower Gear Case Gearbox for John Deere is a direct-fit replacement that keeps your 425, 445, or 455 series tractor mowing reliably. Engineered to handle the torque demands of 48-inch, 54-inch, and 60-inch deck configurations, this gear case gearbox restores smooth blade engagement and reduces downtime. It is ideal for homeowners and commercial operators who need a durable, bolt-on solution for their John Deere mower deck.

Built For Performance

• Heavy-duty cast iron and steel construction withstands high torque loads
• Precision-cut bevel gears provide quiet, efficient power transfer
• Sealed bearings and premium seals minimize contamination and lubrication loss
• Direct bolt-on design matches AM143310 mounting for easy installation
• Compatible with 48-inch, 54-inch, and 60-inch deck widths for versatile fitment
• Corrosion-resistant exterior extends service life in wet conditions

Fits These Machines

• for John Deere 425 with 48-inch deck
• for John Deere 425 with 54-inch deck
• for John Deere 425 with 60-inch deck
• for John Deere 445 with 48-inch deck
• for John Deere 445 with 54-inch deck
• for John Deere 445 with 60-inch deck
• for John Deere 455 with 48-inch deck
• for John Deere 455 with 54-inch deck
• for John Deere 455 with 60-inch deck

On-The-Job Use

• Drives the blade spindles on 48-inch to 60-inch mower decks on 425, 445, and 455 tractors
• Replaces a seized or noisy gearbox that causes uneven cutting
• Maintains consistent blade speed during heavy residential and commercial mowing
• Restores functionality for tractors used on large estates, sports fields, and golf course fairways
• Ideal for operators who swap between different deck sizes on the same chassis

Specs At A Glance

Good To Know

Q: Will this gearbox fit my John Deere 425 with a 54-inch deck? A: Yes, the AM143310 gear case gearbox fits John Deere 425, 445, and 455 tractors with 48-inch, 54-inch, and 60-inch decks; always confirm deck model and serial number before ordering.

Q: Is this gearbox pre-filled with gear oil? A: Most replacement gearboxes ship without oil; fill with SAE 80W-90 gear oil as specified in your tractor manual before operation to prevent damage.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.