2 Pack AUC15811 Spindle Assembly with GX20367 Pulley GX20072 Belt AM141034 Blades Replaces GY21098 GY20454 GY20962 for John Deere D130 D110 D105 D125 E100 E130 LA105 E110 E120 LA115 D100 Deck

What It Is

This is a 2-pack of complete spindle assemblies (AUC15811) for 42-inch and 48-inch John Deere decks, including pulleys, belt, and blades. It’s designed for residential lawn tractors like the D100, D110, D130, E100, E130, and LA105 series.

Fitment & Compatibility

• Deck size: Fits 42-inch (D100/D110/D130/D105/D125) and 48-inch (E100/E130/E110/E120/LA115/D100) decks. Measure your deck width to confirm.
• Models: Replaces OEM numbers GY21098, GY20454, GY20962, and fits most 100-series John Deere tractors from 2010–2020. Check your model’s year and deck part number.
• OEM vs aftermarket: This is an aftermarket set. It includes two spindles, two pulleys (GX20367), one belt (GX20072), and two blades (AM141034). Verify your deck uses a single or dual-blade setup—this kit is for two spindles.
• Measurements: Spindle shaft diameter is 5/8-inch. Blade length is 20.5 inches. Pulley diameter is 4 inches. Confirm these match your existing parts.

Key Things to Know

• Quality: Users report these spindles are durable but not OEM-grade. Expect 2–3 seasons with regular use. Grease fittings are included for maintenance.
• Installation difficulty: Moderate. You’ll need a jack, socket set, and torque wrench. The belt routing can be tricky—take a photo of the old setup first.
• Common gotcha: The blades may need balancing. Also, the spindle housing bolts can strip if over-tightened (torque to 30–35 ft-lbs).
• Compatibility check: If your deck has a 54-inch cut, this kit will not fit. Also, verify your pulley bolt pattern—some decks use a 3-bolt vs 4-bolt spindle mount.

Should You Buy It

Buy this if you have a John Deere 100-series tractor with a 42 or 48-inch deck and need to replace worn spindles (noisy, wobbling, or leaking grease). It’s a good value for a full refresh kit, but skip it if you want OEM parts or have a 54-inch deck.