8TEN Spindle for Cub Cadet 54" Decks — Long Shaft Replacement Spindle with Hardware, 7-5/16" Height

The 8TEN replacement spindle is a direct-fit mower spindle assembly engineered to restore cutting performance on select Cub Cadet, Troy-Bilt and MTD 54-inch decks.

If your mower is showing uneven cuts, vibration, or noisy spindles, this 8TEN spindle is built to match OEM geometry and mounting points for a straightforward swap. Manufactured to the same basic dimensions as the original parts listed, it includes blade mounting hardware and a long shaft design that fits a wide range of model numbers from Cub Cadet, Troy-Bilt and MTD. The spindle restores blade alignment and helps return your deck to consistent, even cutting when installed correctly.

Which mower models and OEM part numbers will this spindle replace?

This 8TEN spindle is compatible with multiple OEM numbers and many 54-inch deck mower models. It covers common Cub Cadet and MTD part references to simplify finding the correct replacement for older or newer machines.

• OEM compatibility: 618-04608A, 618-0671, 618-0671B, 618-0671D, 918-04608A, 918-0671, 918-0671B.
• Cub Cadet and MTD models: ZT54, ZTL8000, RZT54, GT954, GT2550, GT2754, GT5426, GT5427 and related serial ranges.
• Troy-Bilt models: Big Red Horse, Big Red GT54, GTX2654, TB2654, TB2454 series with 54" decks.
• Specific Cub Cadet GT1554 serial compatibility noted for certain production runs.

What are the physical specifications and included parts?

The spindle uses a long shaft configuration and matches the pulley and height dimensions required for indicated 54" decks. It ships with blade mounting hardware so you have the essential fasteners needed to reattach the blade after installation.

• Overall height: 7 5/16" — designed to align with factory deck spacing.
• Pulley outer diameter: 5 1/2" to fit belt routing on compatible decks.
• Includes blade mounting hardware for immediate installation.
• Long shaft design for applications requiring extended spindle length.

How difficult is installation and what should I check during replacement?

Installation is straightforward for someone comfortable with basic mower maintenance and standard hand tools. Lift and secure the deck, remove the belt and old spindle, then bolt the 8TEN spindle in place following torque specs; always verify blade clearance and belt alignment before mowing.

• Recommended tools: socket set, torque wrench, jack or deck support, safety gloves and eye protection.
• Key checks: blade runout, belt tracking, and proper pully seating after install.
• Replace worn belts or blades during the repair to prevent premature spindle wear.
• Follow manufacturer torque values for mounting bolts and blade fasteners.

Who is this for: Owners or technicians who need a reliable, OEM-equivalent spindle for 54-inch Cub Cadet, Troy-Bilt or MTD decks. If you operate one of the listed models and are experiencing vibration, wobbling blades, or degraded cut quality, this 8TEN spindle provides a direct-fit replacement with included hardware to get your mower back to consistent performance.