ClickCease 1999-2008 GM 1500 8.25"/8.6" Front & Rear Ring and Pinion Gear Package – Rigid Axle


1999-2008 GM 1500 8.25"/8.6" Front & Rear Ring and Pinion Gear Package w/ Master Bearing Kits

$1,106.00 $626.34

GM8.25IFS-308-RA GM8.25IFSMK-B GM8.5-308-RA GM8.6MK

Gear & Install Package

Rigid Axle

+ -

GM 8.25"/8.6" Gear Package


Package Includes:

(1) Front 8.25" IFS Ring and Pinion Gear Set
(1) Front Master Bearing Install Kit
(1) Rear 8.6" Ring and Pinion Gear Set
(1) Rear Master Bearing Install Kit

- *Note: Rigid Axle's OE Dry 2-Cut is only available for rear 8.6" ring and pinions. The GM 8.25" IFS has a carrier break at 3.23 & numerically lower / 3.42 & numerically higher. That means if you have 3.08-3.23 ratios from the factory, and would like to run 3.42-5.13 ratios, you will need to buy a new carrier. Contact support if you need help figuring out what carrier you have.

- Rigid Axle's OE Dry 2-Cut and aftermarket ring and pinion gear sets are made from heat treated 8620 steel. Our OE Dry 2-Cut ring and pinions are made using a two-cut, face hobbed manufacturing process. The advantage to running a 2-Cut gear is how quiet they operate. If you want a guaranteed quiet gear, upgrade to our Dry 2-Cut gear set! When these gears are set up properly and rolled with gear marking compound, the pattern will show up slanted. Our aftermarket gear set is made using a five-cut, face milled manufacturing process. Once set up correctly, this will give a square contact pattern on the drive and coast side of each tooth. We are proud of our ring and pinion lines, and you will be too!

- Remember to properly break in your new gear set! Click here for instructions!

- Our Master overhaul kits come with everything you need to replace, modify, or rebuild your differential. This will allow you to get the job done quicker, and cheaper at the end of the day. Rigid Axle master bearing install kits include:

  • Both (Inner & Outer) Pinion Bearings and Races
  • Carrier Bearings and Races
  • Pinion and Carrier Shims
  • Pinion Seal
  • Pinion Nut
  • Ring Gear Bolts
  • Crush Sleeve
  • Complete Shims
  • Threadlocker
  • RTV Sealant or Cover Gasket

- Rigid Axle is proud to offer our customers a full line of differential, transfer case, and transmission parts. We specialize in complete rebuild kits for domestic cars and trucks. Give us a call with your year, make, and model and we'll build you a custom kit for your build!


  • Cadillac Escalade (1999-2008)

  • Chevrolet / Chevy Avalanche 1500 (2002-2013)

  • Chevrolet / Chevy Tahoe 1500 1/2 Ton (1999-2008)
  • Chevrolet / Chevy Suburban 1/2 Ton (1999-2008)

  • Chevrolet / Chevy Silverado 1500 1/2 Ton (1999-2008)
  • GMC Suburban 1/2 Ton (1999-1999)
  • GMC Sierra Denali (1999-2008)
GMC Yukon 1500 1/2 Ton (1999-2008)
  • GMC Yukon XL 1500 1/2 Ton (2000-2008)
  • GMC Sierra 1500 1/2 Ton (1999-2008)

  GM 8.25" IFS Front Specifics

  • Differential Model: GM 8.25" IFS
  • Carrier Breaks: 3.23 & Numerically Lower / 3.42 & Numerically Higher
  • Ring Gear Bolt Quantity: 10
  • Ring Gear Bolt Size: 7/16" X 20 LH
  • Ring Gear Diameter: 8.25 Inch
  • Ring Gear Material: 8620 Steel
  • Ring Gear Rotation: Reverse
  • Ring Gear Tooth Quantity: 30
  • Pinion Diameter: 1.625 Inch
  • Pinion Gear Tooth Quantity: 13
  • Pinion Spline: 30

  GM 8.6" Rear Specifics

  • Differential Model: GM 8.6"
  • Cover Bolt Quantity: 10
  • Ring Gear Bolt Quantity: 10
  • Ring Gear Diameter: 8.5 Inch
  • Ring Gear Material: Heat Treated 8620 Steel
  • Ring Gear Rotation: Standard
  • Pinion Shaft Diameter: 1.626 Inch
  • Pinion Spline Count: 30
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