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USA Standard Gear ZA W24120 GM Axle Kit 1979-1987 GM Truck Blazer 8.5" 28 Spline 4340 Chrome Moly
$1547.89
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USA Standard Gear ZA W24120 Axle Kit

When it comes to enhancing the performance of your classic GM truck or Blazer, the USA Standard Gear ZA W24120 is a top-tier choice. Crafted with precision and built to last, this axle kit is designed specifically for the GM 8.5-inch axle found in select models from 1979 to 1987. Customers rave about the durability and reliability of these axles, making them a favorite among off-road enthusiasts and daily drivers alike.

Key Features:

  • 28 spline inner and 19 spline outer for optimal performance.
  • Includes robust 4340 Chromoly axles that provide superior strength and resistance to wear.
  • Equipped with Yukon Super Joints, ensuring smooth operation and enhanced reliability.

Benefits:

With the ZA W24120, you can expect a noticeable improvement in your vehicle’s handling and stability. The high-quality materials used in construction mean you can tackle tough terrains without worrying about axle failure. Plus, the 5-year warranty against manufacturer defects adds peace of mind to your investment.

Customer Feedback:

"I installed the ZA W24120 on my 1986 C/K 10 and couldn't be happier. The fit was perfect, and I immediately noticed a difference in how my truck handled off-road. Highly recommend!" - Mike T.

"These axles are tough! I’ve taken my Blazer through some serious mud and rocks, and they’ve held up great. Worth every penny." - Sarah L.

Technical Data:

  • Fits GM 8.5 inch axle in select models from 1979-1987.
  • Includes both inner and outer axles for complete installation.
  • Designed for 1/2 ton and 3/4 ton vehicles, ensuring a reliable upgrade.

Compatibility:

The ZA W24120 is compatible with the following vehicles:

  • Chevrolet Blazer 1987
  • Chevrolet C/K 10 1979-1986
  • Chevrolet C/K 20 1979-1986
  • Chevrolet K5 Blazer 1979-1986
  • Chevrolet R/V 10 1987
  • Chevrolet R/V 20 1987
  • Chevrolet Suburban 1979-1988
  • GMC C/K 1500 1979-1986
  • GMC C/K 2500 1979-1986
  • GMC V1500 1987
  • GMC V2500 1987

Upgrade your vehicle with the USA Standard Gear ZA W24120 axle kit and experience the difference in performance and reliability. Whether you're hitting the trails or cruising the streets, these axles are built to keep you moving.

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WARNING: Cancer and Reproductive Harm
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Vehicle Make/Model
Chevrolet Blazer 1987 Silverado
Chevrolet Blazer 1987 Custom Deluxe
Chevrolet C10 1979-1986 Custom
Chevrolet C10 1979-1986 Silverado
Chevrolet C10 1979-1980 Big Ten
Chevrolet C10 1979-1986 Scottsdale
Chevrolet C10 1979-1980 Custom Deluxe
Chevrolet C10 1979-1981 Cheyenne
Chevrolet C10 1981 Deluxe
Chevrolet C10 Suburban 1979-1980 Custom Deluxe
Chevrolet C10 Suburban 1979-1980, 1982-1986 Silverado
Chevrolet C10 Suburban 1979-1980, 1982, 1984-1986 Scottsdale
Chevrolet C10 Suburban 1981 Deluxe
Chevrolet C10 Suburban 1981-1986 Custom
Chevrolet C20 1979-1980 Custom Deluxe
Chevrolet C20 1979-1986 Silverado
Chevrolet C20 1979-1986 Scottsdale
Chevrolet C20 1979-1981, 1986 Cheyenne
Chevrolet C20 1981 Deluxe
Chevrolet C20 1981-1986 Custom
Chevrolet C20 1986 Base
Chevrolet C20 Suburban 1979-1980, 1982, 1984-1986 Scottsdale
Chevrolet C20 Suburban 1979-1980 Custom Deluxe
Chevrolet C20 Suburban 1979-1980, 1982-1986 Silverado
Chevrolet C20 Suburban 1981 Deluxe
Chevrolet C20 Suburban 1981-1986 Custom
Chevrolet K10 1979-1986 Silverado
Chevrolet K10 1979-1981 Cheyenne
Chevrolet K10 1979-1980 Custom Deluxe
Chevrolet K10 1979-1986 Scottsdale
Chevrolet K10 1981-1986 Custom
Chevrolet K10 1981 Deluxe
Chevrolet K10 Suburban 1979-1980 Custom Deluxe
Chevrolet K10 Suburban 1979-1980, 1982-1983, 1985-1986 Silverado
Chevrolet K10 Suburban 1979-1980, 1982, 1984-1986 Scottsdale
Chevrolet K10 Suburban 1981-1986 Custom
Chevrolet K10 Suburban 1981 Deluxe
Chevrolet K20 1979-1986 Scottsdale
Chevrolet K20 1979-1983, 1985-1986 Silverado
Chevrolet K20 1979-1981 Cheyenne
Chevrolet K20 1979-1980 Custom Deluxe
Chevrolet K20 1981-1986 Custom
Chevrolet K20 1981 Deluxe
Chevrolet K20 Suburban 1979-1980, 1982, 1984-1986 Scottsdale
Chevrolet K20 Suburban 1979-1980 Custom Deluxe
Chevrolet K20 Suburban 1979-1980, 1982-1983, 1985-1986 Silverado
Chevrolet K20 Suburban 1981-1986 Custom
Chevrolet K20 Suburban 1981 Deluxe
Chevrolet K5 Blazer 1979-1980 Custom Deluxe
Chevrolet K5 Blazer 1979-1980 Cheyenne
Chevrolet K5 Blazer 1980-1986 Silverado
Chevrolet K5 Blazer 1981-1986 Custom
Chevrolet K5 Blazer 1981 Deluxe
Chevrolet K5 Blazer 1984 Scottsdale
Chevrolet R10 1987 Custom Deluxe
Chevrolet R10 1987 Silverado
Chevrolet R10 1987 Scottsdale
Chevrolet R10 Suburban 1987 Custom Deluxe
Chevrolet R10 Suburban 1987-1988 Silverado
Chevrolet R10 Suburban 1987-1988 Scottsdale
Chevrolet R20 Suburban 1987-1988 Silverado
Chevrolet R20 Suburban 1987-1988 Scottsdale
Chevrolet R20 Suburban 1987 Custom Deluxe
Chevrolet S10 Blazer 1987 High Country
Chevrolet S10 Blazer 1987 Tahoe
Chevrolet S10 Blazer 1987 Base
Chevrolet S10 Blazer 1987 Sport
Chevrolet Suburban 1987-1988 Base
Chevrolet V10 1987 Custom Deluxe
Chevrolet V10 1987 Silverado
Chevrolet V10 1987 Scottsdale
Chevrolet V10 Suburban 1987-1988 Scottsdale
Chevrolet V10 Suburban 1987 Custom Deluxe
Chevrolet V10 Suburban 1987-1988 Silverado
Chevrolet V20 1987 Custom Deluxe
Chevrolet V20 1987 Scottsdale
Chevrolet V20 1987 Silverado
Chevrolet V20 Suburban 1987 Custom Deluxe
Chevrolet V20 Suburban 1987-1988 Silverado
Chevrolet V20 Suburban 1987-1988 Scottsdale
GMC C1500 1979-1986 High Sierra
GMC C1500 1979-1982 Sierra Grande
GMC C1500 1979-1982 Street Coupe
GMC C1500 1979-1986 Base
GMC C1500 1979-1980 Heavy Half
GMC C1500 1979-1986 Sierra Classic
GMC C1500 Suburban 1979-1982 Sierra Grande
GMC C1500 Suburban 1979-1986 High Sierra
GMC C1500 Suburban 1979-1986 Sierra Classic
GMC C1500 Suburban 1979-1986 Base
GMC C2500 1979-1986 Base
GMC C2500 1979-1986 Sierra Classic
GMC C2500 1979-1986 High Sierra
GMC C2500 1979-1982 Sierra Grande
GMC C2500 Suburban 1979-1986 Sierra Classic
GMC C2500 Suburban 1979-1986 Base
GMC C2500 Suburban 1979-1986 High Sierra
GMC C2500 Suburban 1979-1982 Sierra Grande
GMC K1500 1979-1986 Sierra Classic
GMC K1500 1979-1986 High Sierra
GMC K1500 1979-1982 Sierra Grande
GMC K1500 1979-1986 Base
GMC K1500 Suburban 1979-1982 Sierra Grande
GMC K1500 Suburban 1979-1986 High Sierra
GMC K1500 Suburban 1979-1986 Base
GMC K1500 Suburban 1979-1986 Sierra Classic
GMC K2500 1979-1986 Sierra Classic
GMC K2500 1979-1982 Sierra Grande
GMC K2500 1979-1986 High Sierra
GMC K2500 1979-1986 Base
GMC K2500 Suburban 1979-1986 Sierra Classic
GMC K2500 Suburban 1979-1982 Sierra Grande
GMC K2500 Suburban 1979-1986 Base
GMC K2500 Suburban 1979-1986 High Sierra
GMC V1500 1987 Base
GMC V1500 1987 High Sierra
GMC V1500 1987 Sierra Classic
GMC V1500 Suburban 1987 Sierra Classic
GMC V1500 Suburban 1987 High Sierra
GMC V1500 Suburban 1987 Base
GMC V2500 1987 Base
GMC V2500 1987 Sierra Classic
GMC V2500 1987 High Sierra
GMC V2500 Suburban 1987 Base
GMC V2500 Suburban 1987 High Sierra
GMC V2500 Suburban 1987 Sierra Classic

USA Standard Gear Banner

Who is USA Standard Gear?

USA Standard Gear is a company that supplies high-quality parts for the automotive industry. They are a one-stop-shop for all your drivetrain component needs and have one of the industry's most comprehensive parts list and inventory. Today, they are considered the leading supplier of these parts in the United States.

Drivetrain Experts

The company offers various parts ranging from axles, differential gears, lockers, limited slips, drivelines, and more. It is built by a team of craftsmen who has years of experience when it comes to assembling and modifying their own builds. This passion is what drives the company to create some of the best products in the market.

Quality In Every Product

All their parts are manufactured in their facility equipped with the latest and most sophisticated tools available today. They also have two high-tech testing labs to ensure that every product comes out with the company's quality.

The USA Standard Gear engineering team is constantly on edge trying to find ways to develop and further improve their products. That is why they can produce innovative parts that adapt to the changing trend in the automotive world.

Purchase USA Standard Gear at Vivid Racing

If you are in the market for reliable and top-notched drivetrain components, then USA Standard Gear is the brand for you. With years of experience developing their products, they have provided their customers with parts they could trust, whether it's a replacement component or an upgrade. 

To know more about USA Standard Gear, visit Vivid Racing and check out their list of offerings that fit your specific requirement.





USA Standard Gear® ("USA Standard") warrants the original retail purchaser that all USA Standard products will be free from defects in materials and workmanship for the periods shown herein. USA Standard makes no other warranty of any kind, express or implied. All other warranties, including but not limited to an implied warranty of merchantability or fitness for a particular purpose, are excluded. This warranty is offered provided that the USA Standard product has been installed and maintained in accordance with USA Standard instructions, and that it has not been subject to modification, accident, abnormal use or misuse. At USA Standard's discretion, this warranty may be voided if installation of USA Standard product(s) occurs on vehicles with tires that exceed USA Standard Maximum Recommended Tire Size.

Upon notification of a warranty claim, USA Standard shall investigate the claim of defect, and, in the event of a verified defect, shall, at their sole choice, either repair the defective product or replace it.

This warranty does not cover, and USA Standard shall not be liable for, incidental or consequential damages, including loss of time, road service charges, labor charges, inconvenience, loss of vehicle use, loss of revenues, or loss or damage to personal property (including loss or damage to vehicle parts due to the failure of the USA Standard product). In addition, this warranty does not cover, and USA Standard shall not be liable for, any undertaking, representation, or agreements made by dealers or other third parties selling USA Standard Gear® products, except where such agreements are within the provisions of this Warranty statement. Also, this warranty does not cover damage to the axle caused by or facilitated by failure of a non-USA Standard component.

This agreement offers you specific legal rights. You may also have other rights which vary from state to state.

USA STANDARD GEAR® WARRANTY BY PRODUCT
USA Standard Product Length of Warranty (From date of sale) NOTES
SpoolAs long as original purchaser owns vehicle in which Spool is originally installed It is normal for Spools to cause tire chatter, squeal, or scrubbing when vehicle is not moving in a straight line. Both rear tires must measure the same height from ground to top of wheel for Spool to function properly without premature wear.
Rear Axle (1040/1050)Five (5) Years Covers parts for five years against manufacturing defects.
Front Axle (Series ZA W)Five (5) Years Five year warranty covering manufacturing defects and axle breakage. This warranty is not transferable to another party. “No Questions Asked” replacement for first warranty return, however, USA Standard Gear reserves the right to either replace axle or refund original purchase price after the first warranty claim. USA Standard Gear (through RANDYS Worldwide Automotive) makes final determination on warranty considerations.
Ring & Pinion Gear SetOne (1) YearWarrantied against manufacturing defects for one (1) year.
Positraction DifferentialOne (1) Year Exclusions apply, does not cover premature clutch wear or abuse. It is normal for Positraction differentials to cause tire chatter, squeal, or scrubbing when vehicle is not moving in a straight line. Both rear tires must measure the same height from ground to top of wheel for differential to function properly without premature wear. Limited slip additive or appropriate friction modifier must be used with oil to reduce Positraction chatter.
Spartan LockerOne (1) YearWarrantied against manufacturers defects for one (1) year.
Install KitsOne (1) Year Includes ZBK, ZPK, and ZK. Covers parts for one year against manufacturing defects.
Spider Gear Kits (ZIK)One (1) YearOne year against manufacturing defects. Exclusions apply, does not cover clutch wear in limited slip differentials.
Replacement Driveshafts (ZDS)One (1) Year Warrantied against manufacturing defects for one (1) year.

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