Skip to content
Free Shipping $49+
Factory Direct No Middleman
30-Day Returns
24/7 1-800-HEIMA-00
Track Order Install Videos FAQ Contact
Heima
Account
Cart
Shop All Parts Repair Guides Install Videos Brands About FAQ Contact ⚡ Clearance
Home/Lawn Mower Parts/Mower Deck Spindle Assembly/GY21098
On Sale
GY21098 Mower Deck Spindle Assembly Compatible with John Deere, Replaces AUC15811 GX21694 GY20454 GY20867 GY20962
  • GY21098 Mower Deck Spindle Assembly Compatible with John Deere, Replaces AUC15811 GX21694 GY20454 GY20867 GY20962
  • GY21098 Mower Deck Spindle Assembly Compatible with John Deere, Replaces AUC15811 GX21694 GY20454 GY20867 GY20962
  • GY21098 Mower Deck Spindle Assembly Compatible with John Deere, Replaces AUC15811 GX21694 GY20454 GY20867 GY20962
  • GY21098 Mower Deck Spindle Assembly Compatible with John Deere, Replaces AUC15811 GX21694 GY20454 GY20867 GY20962
  • GY21098 Mower Deck Spindle Assembly Compatible with John Deere, Replaces AUC15811 GX21694 GY20454 GY20867 GY20962
  • GY21098 Mower Deck Spindle Assembly Compatible with John Deere, Replaces AUC15811 GX21694 GY20454 GY20867 GY20962
  • GY21098 Mower Deck Spindle Assembly Compatible with John Deere, Replaces AUC15811 GX21694 GY20454 GY20867 GY20962
  • GY21098 Mower Deck Spindle Assembly Compatible with John Deere, Replaces AUC15811 GX21694 GY20454 GY20867 GY20962
Factory Certified
Free Ship $49+
30-Day Returns
1-Year Warranty
Compatible Brands
Compatible Models
Showing 57 compatible models
Aftermarket Replacement · Factory Direct
OEM-compatible part built to original specifications. Not manufactured by or affiliated with the original equipment brand.

GY21098 Mower Deck Spindle Assembly Compatible with John Deere, Replaces AUC15811 GX21694 GY20454 GY20867 GY20962

SKU: GY21098
OEM RetailBranded
$47.94
Via distributor
Source: SmithTractorParts.net · Apr 2026
OEM brand & packaging
Factory direct price
1-year warranty
Our PartBest Value
$31.99
Factory direct
OEM-Compatible
Meets OEM specifications
Factory direct price
1-year warranty
Save by going factory direct
OEM-compatible · no distributor markup
$15.95
33% less than OEM retail
Order within --:-- to ship today
Repair Time30-60 Minutes
DifficultyModerate
DIY FriendlyYes
Tools Needed
Socket Set (38" & 12" drive)Torque WrenchBlade-Removal Tool or Block of WoodGrease GunTap Set (for threading mounting holes)Jack Stands or Mower Deck Lift
Qty
Ships from China · 10–20 business days
No sales tax outside CA
or
GY21098 Mower Deck Spindle Assembly Compatible with John Deere, Replaces AUC15811 GX21694 GY20454 GY20867 GY20962
$43.99 Original price was: $43.99.$31.99Current price is: $31.99.
In Stock

This Part Fixes These Problems

Grinding / Squealing Noise

Loud grinding or squealing from the mower deck caused by worn or seized spindle bearings. Replacing the spindle assembly eliminates the noise and restores smooth operation.

Uneven or Wavy Cut

Blades cutting unevenly or leaving uncut rows of grass due to a bent spindle shaft or failed bearings that allow the blade to wobble off-plane.

Excessive Deck Vibration

Severe vibration through the mower deck and handles caused by an imbalanced or damaged spindle assembly preventing the blade from spinning true.

Blade Won't Engage Properly

Blade fails to spin or disengages under load due to a seized spindle that prevents the pulley from transferring belt power to the blade.

Visible Spindle Wobble

Spindle shaft visibly wobbles when the blade is spun by hand (engine off) — a clear sign of worn internal bearings requiring immediate replacement to prevent deck damage.

Repair Guides

John Deere Lawn Tractor Deck Spindle Assembly Parts — Models & Compatibility
May 30, 2026
John Deere Mower Deck Spindle Assembly Failure — 5 Causes & How to Fix
May 29, 2026

Product Description

Why Choose Our GY21098 Mower Deck Spindle Assembly?

🔧
Built to OEM SpecificationsHeight 7-3/16", outer diameter 5", precision-engineered for the 7-point star spindle shaft — identical dimensions to the original John Deere GY21098 unit.
🌿
Wide Deck CompatibilityFits 42", 48" and 54" mower decks across John Deere 100, D100–D160, E100–E170, LA100–LA165, S100–S170 and X105–X167 series riding lawn tractors.
⚙️
Complete Hardware IncludedShips with grease zerk, pulley lock nut, blade lock nut and washer — everything needed for a straightforward bolt-on installation without additional trips to the hardware store.
💪
Heavy-Duty HousingDurable cast housing with sealed precision bearings delivers smooth, consistent blade rotation season after season — reducing vibration and delivering an even cut.
🛢️
Greaseable DesignIntegrated grease zerk fitting allows routine lubrication to extend bearing life significantly. Always grease spindle before first use and after every 25 hours of operation.
💰
Fraction of Dealer PriceOEM John Deere GY21098 lists at $47–$89 per spindle at authorized dealers. Our aftermarket replacement delivers the same fit and function at a significantly lower cost.

💡 Pro Tip: Is Your Spindle the Problem?

Your part is likely the culprit if you notice any of the following:

⚠️ Loud grinding, squealing or rumbling noise coming from the mower deck during operation

⚠️ Blades cutting unevenly or leaving uncut strips of grass

⚠️ Excessive vibration felt through the mower deck or handles

⚠️ Spindle shaft visibly wobbling, bent, or blade not sitting level under the deck

🔍 Diagnostic tip: With the engine OFF and spark plug wire disconnected, grab each blade tip and wiggle it up and down. Any play or roughness when spinning by hand indicates worn spindle bearings that need immediate replacement.

📦 What's in the Box

✅ 1× Mower Deck Spindle Assembly (Height 7-3/16", OD 5", 7-pt star shaft)

✅ 1× Grease Zerk fitting

✅ 1× Pulley Lock Nut

✅ 1× Blade Lock Nut + Washer

Questions & Answers

No questions yet — be the first to ask.

We typically respond within 1 business day. Include your appliance model number for the fastest answer.




    Customer Reviews

    Reviews

    There are no reviews yet.

    Be the first to review "GY21098" Cancel reply

    Your email address will not be published. Required fields are marked *

    Related Parts

    WH49X10042 Washer Agitator Coupling Kit Compatible with GE Hotpoint RCA Kenmore, Replaces AP3964635 PS1517844 WH02X10037 WH43X10009 175D2846P001
    WH49X10042
    WH49X10042 Washer Agitator Coupling Kit Compatible with GE Hotpoint RCA Kenmore, Replaces AP3964635 PS1517844 WH02X10037 WH43X10009 175D2846P001
    $20.99 Original price was: $20.99.$14.99Current price is: $14.99.
    4323EA2001C Washer Shift Actuator Coupling Assembly Compatible with LG Kenmore, Replaces PS7786658 AP5674447 ACP72929002 PS3522903
    4323EA2001C
    4323EA2001C Washer Shift Actuator Coupling Assembly Compatible with LG Kenmore, Replaces PS7786658 AP5674447 ACP72929002 PS3522903
    $40.99 Original price was: $40.99.$29.99Current price is: $29.99.
    DD81-02635A Dishwasher Drain Pump Assembly Compatible with Samsung, Replaces AP6807450 PS12593038 B20-3A01 4958703
    DD81-02635A
    DD81-02635A Dishwasher Drain Pump Assembly Compatible with Samsung, Replaces AP6807450 PS12593038 B20-3A01 4958703
    $191.99 Original price was: $191.99.$117.99Current price is: $117.99.
    131560100 Drive Motor with Pulley Compatible with Frigidaire Electrolux Gibson Kenmore, Replaces AP2107144 134156500 PS418132 407697
    131560100
    131560100 Drive Motor with Pulley Compatible with Frigidaire Electrolux Gibson Kenmore, Replaces AP2107144 134156500 PS418132 407697

    Disclaimer: Compatibility information, part numbers, and model fitment data on this page are sourced from manufacturer databases and third-party references. While we strive for accuracy, please verify your appliance model number before ordering. Heima is not responsible for errors or omissions in compatibility listings.

    Home / Lawn Mower Parts / Mower Deck Spindle Assembly / GY21098 Mower Deck Spindle Assembly Compatible with John Deere, Replaces AUC15811 GX21694 GY20454 GY20867 GY20962
    H
    heima

    Heima manufactures appliance parts in our own facilities and ships direct — no distributor, no markup. 200+ brands, 1.8M+ parts, 500K+ satisfied customers.

    Shop Parts
    Refrigerator Washer & Dryer Oven & Range Dishwasher AC & HVAC All Categories
    Support
    Find Your Model Number Installation Videos Live Chat Track My Order Start a Return FAQ
    Company
    About Heima Our Factory Quality Standards Return Policy Privacy Policy Contact Us
    © 2025 Heima Parts  ·  Factory Direct Appliance Parts  ·  All Rights Reserved
    VISA MC AMEX PayPal Discover