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USA Standard Gear

USA Standard Gear (ZG GM8.5-456) Ring & Pinion Gear Set for GM 8.5 Differential, 4.56 gear ratio

  • Based on 858 reviews
Condition: New
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Availability: In Stock.
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Arrives Sunday, Jul 19
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Style: GM 8.5" 4.56 Ratio


Features

  • usa standard ring and pinion sets are the right choice to add confidence to your install
  • usa standard gear offers a full line of ring and pinion sets for a variety of common and hard to find applications
  • usa standard gear offers a standard one year warranty against defects on their ring and pinion sets
  • this product is used in a 4.56 axle ratio
  • Fit type: Vehicle Specific

Description

USA Standard ring & pinion sets are designed to provide a quality and quiet gear set for OEM replacement. USA Standard uses rigorous in-house quality testing and inspections to ensure products pass dimensional, material and fitment testing. USA Standard gears come in OE and aftermarket ratios, providing a wide variety of product to meet the needs of most any installation: from 1948 to present popular vehicle models. USA Standard gears are designed to exceed OEM specification while providing an affordable drivetrain solution. All USA Standard Ring and Pinion Gear Sets come with a standard one year warranty against manufacturing defects.

Manufacturer: ‎USA Standard Gear


Brand: ‎USA Standard Gear


Model: ‎Ring & Pinion Gear Set fits GM 8.5" in a 4.56 Ratio


Item Weight: ‎18.61 pounds


Product Dimensions: ‎16 x 12 x 6 inches


Item model number: ‎ZG GM8.5-456


Exterior: ‎Machined


Manufacturer Part Number: ‎ZG GM8.5-456


OEM Part Number: ‎ZG GM8.5-488


Date First Available: February 13, 2012


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Jul 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Gears
Style: GM 8.5" 4.56 Ratio
Great set of gears used in a drag car for 4 seasons.
Reviewed in the United States on April 1, 2026 by Jerry Key
    • Hold 525 hp great gears as good as yukon
Style: GM 8.5" 4.56 Ratio
Great quality got these gears behind a 525hp built lq9 6.0 with 2800 stall converter abused them from day one they run quite very little noise as u get with aftermarket gears have 1200 miles differential is barley warm very happy for the price unbelievable.
Reviewed in the United States on August 5, 2016 by Joe
    • So far so good
Style: GM 8.5" 4.56 Ratio
Seemingly good product. Have about 800 miles on since installing this in the front and rear of my 88 suburban 8.5" axle. Happy so far
Reviewed in the United States on March 25, 2019 by Kris Moore
    • Chipped Item and no warranty
Style: GM 8.5" 4.56 Ratio
The pinion was chipped I tried getting a warranty for this item and USA standard said they will not honor it through this site.
Reviewed in the United States on August 14, 2024 by Connor
    • Good value
Style: GM 8.5" 4.56 Ratio
Good quality for the price point. No noise that I can hear. Set up well.
Reviewed in the United States on June 16, 2018 by Josh
    • Pulls the truck just fine
Style: GM 8.5" 4.56 Ratio
It’s awsome I put it in my truck
Reviewed in the United States on December 27, 2018 by Amazon Customer
    • Wrong size
Style: GM 8.5" 4.56 Ratio
Received the wrong part. Says it fits the front but is way off.
Reviewed in the United States on May 17, 2018 by Amazon Customer

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