Description

Quick Change Gear Set – 8500 Series – Set 39 – 10 Spline – 4.12 Ratios 6.64 / 2.56 – 4.86 Ratios 7.83 / 3.02 – Steel – Polished – Each

Why Choose Us?



Frequently Asked Questions​

As an Authorized Automotive Retailer in the United States, we take pride in guaranteeing 100% authentic products from all brands available on our website. With partnerships spanning 1,000+ brands and a network of 20+ distributor warehouses nationwide, we maintain millions of auto parts in inventory across the USA, ensuring quick shipping and reliable service to our customers. When you shop with us, you're investing in quality and trust.
We believe we have the fastest backorder system in the U.S. auto parts industry, thanks to our strong partnerships with brands and vendors. Nearly all backordered auto parts are shipped directly by the vendors without any additional delays, or they are placed as special orders on the same day. In most cases, backordered parts are delivered within 5-10 days.
We offer unbeatable prices and the best shipping rates on auto parts, with exclusive protection and insurance included to safeguard your order from damage or loss. Enjoy convenient door-to-door delivery, real-time tracking, and our 100% satisfaction guarantee for a smooth, worry-free experience.
Our standard shipping typically takes 1-3 business days. We will provide estimated shipping time for each product. While we aim to deliver as quickly as possible, this timeframe ensures all orders are processed, prepared, and dispatched with care. If the products are not ready for shipping in 72 hours, we will refund you 100%
Absolutely. Once your order is dispatched, you’ll receive an email with tracking details, so you can follow your shipment every step of the way. Every step of shipping process will be sent through email notifications or using tracking page.
Every product page includes a stock level indicator to show what’s available. We always update the inventory 24/24. We’ll be happy to check availability and provide updates on new stock arrivals if you need a help.
We’re sorry to hear that your order wasn’t delivered in perfect condition. Please email us with your order number, a description of the issue, and photographs of the damaged item. Once we receive this information, we’ll arrange for a replacement or refund and handle the return process.
You can return items within 30 days of receipt. Ensure the product is new in its original packaging and securely wrapped for safe transit. Once we receive the item in sellable condition, we’ll issue a full refund for the product value. Contact us for the return address and further instructions.

About WINTERS

For more than 60 years, Winters Performance Products has been producing high-performance rear ends and driveline components for racing and street use. Their product offering includes everything from quick-change gear sets to shifter assemblies, as well as many components specifically for the sprint car market.

International Shipping

Below are estimated rates and delivery times for popular destinations; full carrier options are available at checkout.

Our dedicated team has years of experience managing international logistics and customs documentation to ensure smooth delivery from our US warehouse to your door. Please review our shipping policy and local import regulations before ordering.

Loading international estimates...

Reviews

There are no reviews yet.

Be the first to review “WINTERS Quick Change Gears 8539”

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

Recently viewed products

  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    RATECH Diff Shims Dana 50 1114

    SKU: RAT1114
    Product information
    Details...
    Original price was: $14.36.Current price is: $12.49.Add to cart
    Original price was: $14.36.Current price is: $12.49.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    SKYJACKER Nitro Shock w/ Red Boot N8053

    SKU: SKYN8053
    Product information
    • Weight6.425 lbs
    • Dimensions24.55 × 3.4 × 3.05 in
    • Hardware Included

      Yes

    • Quantity

      Each

    • Application Specific

      Yes

    • Product Line

      Nitro 8000 Series

    • Internal Design

      Twintube

    Details...
    Original price was: $68.00.Current price is: $61.61.Add to cart
    Original price was: $68.00.Current price is: $61.61.
    Quantity Only 2 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    KEEP IT CLEAN Adjustable Brake Light Switch KICBLSW

    SKU: KICKICBLSW
    Product information
    • Weight0.22 lbs
    • Dimensions7.55 × 3.5 × 2.1 in
    • Adjustable

      Yes

    • Hardware Included

      Yes

    • Quantity

      Each

    • Activation Method

      Lever

    • Bracket Included

      Yes

    Details...
    Original price was: $34.44.Current price is: $29.95.Add to cart
    Original price was: $34.44.Current price is: $29.95.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    JP PERFORMANCE BBF Billet Double Roller Timing Set JP5990

    SKU: JPP5990
    Product information
    • Weight3.4 lbs
    • Dimensions10.2 × 6.9 × 1.5 in
    • Chain Included

      Yes

    • Chain A Style

      Roller

    • Chain A Rows

      Double

    • Chain Length Shorter Than Oe

      Standard

    • Chain Link Quantity

      66.0

    Details...
    Original price was: $126.00.Current price is: $114.06.Add to cart
    Original price was: $126.00.Current price is: $114.06.
    Quantity Only 3 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    Ti22 PERFORMANCE Spark Plug Guards Complete Black TIP5100

    SKU: TIP5100
    Product information
    • Weight1.17 lbs
    • Dimensions22.4 × 7.85 × 4.35 in
    • Material

      Aluminum

    • Color

      Black

    • Finish

      Anodized

    • Quantity

      Kit

    • Chassis Position

      Spark Plug Guard

    Details...
    Original price was: $123.59.Current price is: $102.99.Add to cart
    Original price was: $123.59.Current price is: $102.99.
    Quantity Only 7 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    VENTSHADE Window Ventvisor 4Pc. 94943

    SKU: VEN94943
    Product information
    • Weight2.75 lbs
    • Dimensions47.25 × 12.25 × 1.88 in
    • Product Line

      Original Ventvisor

    • Application Specific

      Yes

    • Front Mounting Style

      Stick-On

    • Rear Mounting Style

      Stick-On

    • In Channel / Out Of Channel

      Out of Channel

    Details...
    Original price was: $77.00.Current price is: $69.99.Add to cart
    Original price was: $77.00.Current price is: $69.99.
    Quantity Only 3 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    HUSKY LINERS Front Floor Liners 18371

    SKU: HSK18371
    Product information
    • Weight7.23 lbs
    • Dimensions33 × 23 × 4 in
    • Product Line

      WeatherBeater

    • Material

      Plastic

    • Color

      Black

    • Finish

      Natural

    • Quantity

      Pair

    Details...
    Original price was: $85.00.Current price is: $76.49.Add to cart
    Original price was: $85.00.Current price is: $76.49.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    HOLLEY Solenoid – Boost Control 557-201

    SKU: HLY557-201
    Product information
    • Weight1.05 lbs
    • Dimensions5.7 × 3.4 × 3.4 in
    • Material

      Aluminum

    • Color

      Black

    • Finish

      Anodized

    • Quantity

      Kit

    • Wiring Harness Included

      Yes

    Details...
    Original price was: $508.00.Current price is: $460.95.Add to cart
    Original price was: $508.00.Current price is: $460.95.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    GT PERFORMANCE GT9 Horn Button Plain Billet Button -291888

    SKU: GTP11-1100
    Product information
    • Weight0.745 lbs
    • Dimensions6.6 × 5.4 × 3.75 in
    • Product Line

      GT9

    • Height

      Flat

    • Diameter

      3-1/2 in

    • Intended Steering Wheel

      9-Bolt

    • Hardware Included

      Yes

    Details...
    Original price was: $54.57.Current price is: $49.61.Add to cart
    Original price was: $54.57.Current price is: $49.61.
    Quantity Only 2 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    WINTERS Quick Change Gears 8531A

    SKU: WIN8531A
    Product information
    • Weight6.95 lbs
    • Dimensions8.8 × 4.9 × 1.9 in
    • Spline

      10.0

    • Set Number

      31A

    • Gear 1 Tooth Count

      21.0

    • Gear 2 Tooth Count

      36.0

    • 4:12 Ring And Pinion Low Ratio

      2.4

    Details...
    Original price was: $128.16.Current price is: $116.51.Add to cart
    Original price was: $128.16.Current price is: $116.51.
    Quantity Only 2 left in stock!
    -+
    Add to cart
    Add to wishlist

    69