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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)Find parts that fit my vehicle

Item S506518
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AmericanTrucks no longer carries the 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). Please check out 1999-2006 GMC Sierra Drivetrain for an updated selection.
23 Reviews of G2 Axle and Gear
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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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    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    Installation & What's in the Box

    Installation Info

    Installation Time

    (approx) 3 Hours

    Difficulty Level:

    Mechanical expertise or professional installation required.

    Installation Guides

      No guide available for this part yet.

    What's in the Box

    • (1) Ring Gear
    • (1) Pinion Gear
    4.7

    Reviews of G2 Axle and Gear Drivetrain Products (23)

    Questions & Answers

    No questions about this product yet. Ask the First Question