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Yukon Gear & Axle YGK2121 Differential Gear Install Kit for Select Vehicles
$976.89

If you're diving into a re-gear project, you’ll want to check out the Yukon Gear Kits. These kits are like a one-stop shop for everything you need to get your differential back in shape. You get front and rear ring and pinion gear sets, plus a Yukon Master Overhaul Kit—all bundled into one convenient part number. No more hunting around for individual parts; it’s all right here.

Now, let’s talk quality. Yukon Gear & Axle isn’t just another name in the automotive world; their high-performance ring and pinion gear sets are pretty much the gold standard. The engineers over at Yukon use some serious tech—think advanced heat-treating and meticulous quality testing—to make sure everything meets strict standards. You can count on these gears to hold up under pressure.

These kits come with everything you need: gears, bearings, and all those little bits that make a big difference during installation. You can choose from gear ratios ranging from 3.73 to 5.38, so whether you're looking to up your tire size, boost towing capacity, or just replace some old, worn-out gears, Yukon has you covered.

Oh, and they offer the Y.E.S. Plan, which is a lifetime protection plan. That means if anything goes sideways with your gear set, you’re covered for as long as you own your vehicle. Pretty sweet deal, right?

Features:

  • Designed for applications with a 14 Bolt Rear Cover and a 12 Bolt Ring Gear.
  • Pro Kits are built with top-notch components and come with a killer warranty.
  • Includes premium Yukon ring and pinion sets, along with Yukon Master Install kits featuring high-quality Timken bearings.
  • Compatible with carrier cases designed for gear ratios of 4.10 and lower.
  • Ring Gear Diameter measures 10.5 inches.
  • Pro Kits save you time and money by bundling all essential parts into one easy package.
  • This kit specifically includes a 4.56 Thick Ring & Pinion Gear Set.

Products Fitment:

  • Chevrolet Avalanche 1500 2002-2006
  • Chevrolet Avalanche 2500 2002-2006
  • Chevrolet C/K 2500 1989-2000
  • Chevrolet C/K 3500 1989-2000
  • Chevrolet Express 1996-2015
  • Chevrolet G20 1989-1995
  • Chevrolet G30 1989-1995
  • Chevrolet P30 1997-1998
  • Chevrolet Silverado 2500 2001-2010
  • Chevrolet Silverado 3500 2001-2010
  • Chevrolet Suburban 1989-1999 & 2010
  • GMC C/K 2500 1989-2000
  • GMC C/K 3500 1989-2000
  • GMC G3500 1989-1995
  • GMC Savana 1996-1998 & 2010
  • GMC Sierra 2001-2010
  • GMC V2500 Suburban 1989-1991
  • GMC Yukon XL 2010
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Vehicle
2002-2006
Chevrolet Avalanche 1500
2002-2006
Chevrolet Avalanche 2500
1989-2000
Chevrolet C/K 2500
1989-2000
Chevrolet C/K 3500
1996-2015
Chevrolet Express
1989-1995
Chevrolet G20
1989-1995
Chevrolet G30
1997-1998
Chevrolet P30
2001-2010
Chevrolet Silverado 2500
2001-2010
Chevrolet Silverado 3500
1989-1999, 2010
Chevrolet Suburban
1989-2000
GMC C/K 2500
1989-2000
GMC C/K 3500
1989-1995
GMC G3500
1996-1998, 2010
GMC Savana
2001-2010
GMC Sierra
1989-1991
GMC V2500 Suburban
2010
GMC Yukon XL
Yukon's mission is to build quality parts that exceed your expectations. We achieve this through state-of-the-art product design and an in-house engineering team. Our parts are then produced by leaders in OEM manufacturing and endure rigorous testing.
Yukon Gear & Axle ("Yukon") warrants the original retail purchaser that all Yukon products will be free from defects in materials and workmanship for the periods shown herein. Yukon 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 Yukon product has been installed and maintained in accordance with Yukon instructions, and that it has not been subject to modification, accident, abnormal use or misuse. At Yukon's discretion, this warranty may be voided if installation of Yukon product(s) occurs on vehicles with tires that exceed Yukon Maximum Recommended Tire Size.

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

This warranty does not cover, and Yukon 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 Yukon product)*. In addition, this warranty does not cover, and Yukon shall not be liable for, any undertaking, representation, or agreements made by dealers or other third parties selling Yukon Gear & Axle 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-Yukon component.

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

YUKON WARRANTY BY PRODUCT

Spool
  • Length:As long as original purchaser owns vehicle in which Spool is originally installed
  • Notes: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.
Super Joint
  • Length:As long as original purchaser owns vehicle in which Super Joint is originally installed
  • Notes:Warranty coverage is for breakage of cross section or caps only. Failure by wear or galling is not covered.
YP - Series Products (other than Spool and Super Joint)
  • Length:One (1) Year
  • Notes:Covers parts for one year against manufacturers defects.
Front Axle (1541H)
  • Length:Ten (10) Years
  • Notes:Covers parts for ten years against manufacturing defects.
Rear Axle (1541H)
  • Length:Ten (10) Years
  • Notes:Covers parts for ten years against manufacturing defects.
Rear Axle 4340 (YA W)
  • Length:Limited Lifetime
  • Notes:Limited Lifetime warranty covering manufacturing defects and axle breakage for as long as you own the vehicle. This warranty is not transferable to another party. "No Questions Asked" replacement for first warranty return, however, Yukon reserves the right to either replace axle or refund original purchase price after the first warranty claim. Yukon (through RANDYS Worldwide Automotive) makes final determination on warranty considerations.
Front Axle (Series YA W)
  • Length:Limited Lifetime
  • Notes:Limited Lifetime warranty covering manufacturing defects and axle breakage for as long as you own the vehicle. This warranty is not transferable to another party. "No Questions Asked" replacement for first warranty return, however, Yukon reserves the right to either replace axle or refund original purchase price after the first warranty claim. Yukon (through RANDYS Worldwide Automotive) makes final determination on warranty considerations.
Ring & Pinion Gear Set
  • Length:One (1) Year
  • Notes:Warrantied against manufacturing defects for one (1) year.
Positraction Differential
  • Length:One (1) Year
  • Notes: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.
Zip Locker (YZL)
  • Length:Six (6) Years
  • Notes:All Zip Lockers come with a six (6) year warranty against manufacturer defect, including any collaterally damaged parts and associated labor, up to $2,000*, for the first two (2) years. Collaterally damaged parts must be submitted for inspection. Receipts for parts and associated labor must be submitted as well. Only claims deemed reasonable by Yukon Gear & Axle will be accepted. Offer may be discontinued without advance notice.
Grizzly Locker (YGL)
  • Length:One (1) Year
  • Notes:Covers the replacement of the unit and any collaterally damaged parts and associated labor, up to $2,000. Collaterally damaged parts must be submitted for inspection. Receipts for parts and associated labor must be submitted as well. Only claims deemed reasonable by Yukon Gear & Axle will be accepted. Offer may be discontinued without advance notice.
Yokes
  • Length:One (1) Year
  • Notes:Covers parts for one year against manufacturing defects.
Carriers (YC)
  • Length:One (1) Year
  • Notes:Covers parts for one year against manufacturing defects.
Tools (YT)
  • Length:One (1) Year
  • Notes:Covers parts for one year against manufacturing defects.
Install Kits
  • Length:One (1) Year
  • Notes:Includes BK, MK, PK, and YK. Covers parts for one year against manufacturing defects.
Spider Gear Kits (YPK)
  • Length:One (1) Year
  • Notes:One year against manufacturing defects. Exclusions apply, does not cover clutch wear in limited slip differentials.
YHC Drive Flanges
  • Length:Limited Lifetime
  • Notes:Limited Lifetime warranty covering manufacturing defects and breakage for as long as you own the vehicle. This warranty is not transferable to another party. "No Questions Asked" replacement for first warranty return, however, Yukon reserves the right to either replace the part or refund original purchase price after the first warranty claim. Yukon (through RANDYS Worldwide Automotive) makes final determination on warranty considerations.
Yukon Hardcore Locking Hubs
  • Length:Limited Lifetime
  • Notes:Limited Lifetime warranty covering manufacturing defects and breakage for as long as you own the vehicle. This warranty is not transferable to another party. "No Questions Asked" replacement for first warranty return, however, Yukon reserves the right to either replace the part or refund original purchase price after the first warranty claim. Yukon (through RANDYS Worldwide Automotive) makes final determination on warranty considerations
Driveshafts
  • Length:One (1) Year
  • Notes:Warrantied against manufacturing defects for one (1) year. Longer warranty is available through purchase of a Y.E.S. plan.

Installation Instructions

Click to view the Installation Instructions here

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