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Motive Gear 8.80-Inch Front and 9.75-Inch Rear Axle Complete Ring and Pinion Gear Kit; 4.88 Gear Ratio (Late 99-10 4WD F-150)Find parts that fit my vehicle

Item T559912
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$1,209.59
4 Reviews
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-18% $1,209.59 Was $1,478.87

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      Product Information

      Features, Description, Reviews, Q&A

      Features

      • Achieve Close-To-Factory Speeds With Larger Tires
      • 9.75-Inch Rear And 8.80-Inch Front Gear Diameters
      • 4.88 Gear Ratio
      • 31-Spline Rear Pinion
      • 30-Spline Front Pinion
      • One2 Rear Gear Bolts
      • One0 Front Gear Bolts
      • Made Using Solid 8620 Steel
      • Requires Ford 8.8 IFS Carrier For Front And Ford 9.75 Carrier For Rear
      • Reverse Front Rotation And Standard Rear Rotation
      • Complex Installation
      • One-Year Or 50,000-Mile Limited Warranty
      • Made To Fit Late 1999-2010 Ford F-150 4WD Models

      Description

      Improve Fuel Efficiency. With the Motive Gear 8.80-Inch Front and 9.75-Inch Rear Axle Complete Ring and Pinion Gear Kit, you enhance fuel efficiency when using larger tires. That means stronger performance on-road and off, without having to worry about increased costs.

      Re-Gearing. When you install tires with a larger diameter than your stock tires, your factory ring and pinion kit have to rotate more to turn them. The result is more engine power required to achieve the same performance. By re-gearing, you come closer to factory performance levels with larger tires.

      Solid Construction. The 8620 steel used to make these ring and pinion sets ensure they’re strong enough to handle years of daily spinning.

      Professional Fitting Suggested. The intricacy of the installation process means that professional installation is recommended in most cases. Those installing at home will need to have an expert understanding of their vehicle’s drivetrain.

      Covered By Warranty. You’re protected against manufacturing and material faults with a limited warranty that lasts for either 50,000 miles or 1 year.

      Application. The Motive Gear 8.80-Inch Front and 9.75-Inch Rear Axle Complete Ring and Pinion Gear Kit is designed to fit Ford F-150 4WD models built between late 1999-2010.

      Application Note. The rear ring and pinion set requires a 9.75 carrier, with the front set needing an 8.8 IFS carrier.

      Fitment:

      Details

      Motive Gear MGK-321

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      5.0

      Customer Reviews (4)

      Review Summary

      5 out of 5 overall ratings from 4 customers

      Feb 27, 2025

      Review shared from Motive Gear 8.80-Inch Front and 9.75-Inch Rear Axle Complete Ring and Pinion Gear Kit; 4.56 Gear Ratio (11-20 4WD F-150)

      5
      2015 XLT -
      Installation Time: Weekend

      Torque

      All the torque you could dream of. I can break lose in 4high on asphalt. I do have other mods to though.

      Fit 5/5
      Quality 5/5
      Bang For Your Buck 4/5

      Nov 5, 2024

      Review shared from Motive Gear 8.80-Inch Front and 9.75-Inch Rear Axle Complete Ring and Pinion Gear Kit; 4.56 Gear Ratio (Late 99-10 4WD F-150)

      5
      2001 Lariat - Loggerroger
      Installation Time: Full Day

      Gears for my f150

      Awesome woke the old girl up 303000 miles and still kicking thanks you guys works great

      Fit 5/5
      Quality 5/5
      Bang For Your Buck 5/5

      Dec 5, 2023

      Review shared from Motive Gear 8.80-Inch Front and 9.75-Inch Rear Axle Complete Ring and Pinion Gear Kit; 4.56 Gear Ratio (Late 99-10 4WD F-150)

      5
      Bahamut
      Installation Time: Afternoon

      Motive Gear 4.56

      Very good quality product! Was a huge upgrade from my stock 3.55 ratio to 4.56 with 37” tires. Freed up so much power! Had them professionally installed and took about 4 hours.

      Fit 5/5
      Quality 5/5
      Bang For Your Buck 5/5

      Apr 16, 2023

      Review shared from Motive Gear 8.80-Inch Front and 9.75-Inch Rear Axle Complete Ring and Pinion Gear Kit; 4.88 Gear Ratio (11-20 4WD F-150)

      5
      CrowandFerret
      Installation Time: Full Day

      Raptor SVT with 39 K2Os

      I used this to get closer to the stock torque after installing 39-in BFG tires. On my 2014 Raptor SVT I pull a 12-ft 8000 lb trailer 90% of the time. And was looking for a way to get some better get up and go power

      Fit 5/5
      Quality 5/5
      Bang For Your Buck 5/5
      Brand Image

      Reviews of Motive Gear Drivetrain products have an average rating of 4.7 out of 5

      Feb 27, 2025

      Review shared from Motive Gear 8.80-Inch Front and 9.75-Inch Rear Axle Complete Ring and Pinion Gear Kit; 4.56 Gear Ratio (11-20 4WD F-150)

      5
      2015 XLT -

      Torque

      All the torque you could dream of. I can break lose in 4high on asphalt. I do have other mods to though.

      Dec 26, 2024

      Review shared from Motive Gear Super 8.8 and 9.75-Inch Differential Ring Gear Bolt (97-21 F-150)

      5
      2018 Platinum - VictorAlb480

      Superior product

      Glad I was able to purchase this and even better that the shipping was fast and easy

      Dec 26, 2024

      Review shared from Motive Gear Differential Lock Washer (99-20 Silverado 1500)

      5
      2018 Platinum - VictorAlb480

      Strong washer

      Will have to order more because of great the quality is and they do their job great!

      Dec 26, 2024

      Review shared from Motive Gear 8.50-Inch Differential Pinion Gear Thrust Washer (99-14 Silverado 1500)

      5
      2018 Platinum - VictorAlb480

      Fitment is great

      Way better quality then the factory one my truck came with.

      Dec 19, 2024

      Review shared from Motive Gear 9.25-Inch Differential Pinion Nut (07-15 Sierra 2500 HD)

      5
      2016 XLT - Augustus96

      Easy install

      Can’t believe this is all I needed to get my truck running and glad it was in stock and ship quickly

      Dec 19, 2024

      Review shared from Motive Gear 7.25-Inch Differential Side Gear Thrust Washer (87-96 Dakota)

      5
      2016 XLT - Augustus96

      Easy Install

      Quality sure is phenomenal Made of strong material that should last a long time

      Dec 19, 2024

      Review shared from Motive Gear Rear Differential Side Gear Thrust Washer (07-18 Sierra 2500 HD)

      5
      2016 XLT - Augustus96

      Great quality

      Way better quality than I expected. I am glad it was in stock here because I needed it soon.

      Dec 19, 2024

      Review shared from Motive Gear 7.25 and 8-Inch Differential Pinion Nut (87-11 Dakota)

      5
      2016 XLT - Augustus96

      Looks and feels great

      Was very easy to install straightforward can’t complain with this price point. I would order again.

      Dec 12, 2024

      Review shared from Motive Gear Ring Gear Bolt for Chrylser 7.25-Inch and 8-Inch Differential (02-10 RAM 1500)

      5
      2019 Limited - Augustus96

      Strong bolt

      Works great and really strong material that it’s made out of. I would order again

      Dec 9, 2024

      Review shared from Motive Gear Super 8.8 and 9.75-Inch Differential Ring Gear Bolt (97-21 F-150)

      5
      2022 - Augustus96

      Easy to install

      Less than 10 minutes to install. Quality product that is shipped super fast

      Questions & Answers

      No questions about this product yet. Ask the First Question

      Will It Fit My F-150

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