Installation Time
(approx) 3 Hours
Difficulty Level:
Mechanical expertise or professional installation required.
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G2 Axle and Gear 8.5-Inch and 8.6-Inch Rear Axle Ring and Pinion Gear Kit; 4.88 Gear Ratio (99-18 Sierra 1500)
Item S506518
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Our Price
$224.99 (kit)
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Product Information
Features, Description, Q&A, Specs & Installation
Features
- Intended for Performance Vehicles
- With a 4.88:1 Gear Ratio
- Has an 8.5” Ring Gear Diameter
- Designed with a 30 Spline Pinion
- Comes with 10 Ring Gear Bolts
- Precision-Cut from 8620 Steel
- Installation Requires Professional Mechanic or Technical Skill
- Configured for Standard Ring Gear Rotation
- Fits 1999-2018 GMC Sierra 1500 Models
Description
More Torque and Power. The above-average gear ratio of the G2 8.5 in. & 8.6 in. Rear Ring Gear and Pinion Kit for 4.88 Gears effectively increases the torque available to your tires. This improves truck’s overall acceleration and performance when under load. The higher gear ratio also helps maintain speed when climbing steep roads or trails.
Made for Performance Application. G2’s Performance Series 8.5 in. & 8.6 in. Rear Ring Gear and Pinion Kit is made from forged 8620 steel known for its strength and wear-resistance. Both the ring and pinion were also heat-treated to meet the demands of driving in all environments. Although gears and pinions look like devices from the medieval era, these ring and pinions are actually carefully machined to strict OE specifications using an advanced manufacturing process and precision equipment to ensure a smooth finish and perfect fit.
Installation by a Mechanic is Highly Recommended. Transmission systems are complicated, and replacing parts requires specialized skills and tools. This is why installing this rear ring gear and pinion kit is a task best left to professionals or experienced gearheads. Review and follow the installation instructions for best results.
10 Years Limited Manufacturer Warranty. G2 warrants their gear and pinions to be free from workmanship and material defects for the period stated. Please refer to G2’s warranty policies for more details.
Application. The G2 8.5 in. & 8.6 in. Rear Ring Gear and Pinion Kit for 4.88 Gears will fit 1999-2018 GMC Sierra 1500 trucks.
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Fitment:
- 1999 GMC Sierra 1500
- 2000 GMC Sierra 1500
- 2001 GMC Sierra 1500
- 2002 GMC Sierra 1500
- 2003 GMC Sierra 1500
- 2004 GMC Sierra 1500
- 2005 GMC Sierra 1500
- 2006 GMC Sierra 1500
- 2007 GMC Sierra 1500
- 2008 GMC Sierra 1500
- 2009 GMC Sierra 1500
- 2010 GMC Sierra 1500
- 2011 GMC Sierra 1500
- 2012 GMC Sierra 1500
- 2013 GMC Sierra 1500
- 2014 GMC Sierra 1500
- 2015 GMC Sierra 1500
- 2016 GMC Sierra 1500
- 2017 GMC Sierra 1500
- 2018 GMC Sierra 1500
G2 Axle and Gear 2-2021-488
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (1) Ring Gear
- (1) Pinion Gear
4.9
Reviews of G2 Axle and Gear Drivetrain Products (71)
Reviews of G2 Axle and Gear Drivetrain products have an average rating of 4.9 out of 5
Questions & Answers
10 More Questions
