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Motive Gear Performance Plus Ring and Pinion Gear Kit; 4.10 Gear Ratio (99-04 V6)

Item 21101G99
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Ship to: Ashburn - 20149
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Superior Quality
      • CNC-Cut from 8620 Gear Steel
      • 4.10 Gear Ratio
      • 7.5" Ring Gear Diameter
      • For Street or Track Use
      • Fits 1999-2004 V6 Mustangs


      Improve Performance. Wake up your V6-powered pony for faster acceleration off the line with a set of 4.10 Motive Performance Plus gears. A steeper set of gears will get you into your power band faster for faster launches and more punch off the line.

      Superior Construction. These Motive ring and pinon gears are CNC cut from high grade 8620 gear steel, and factory lapped for precision fit. Each set is hardness tested prior to leaving the factory to ensure the highest quality.

      Recommended Upgrade. Changing the rear axle gear ratio will throw off the calibration of your Mustangs speedometer, but a Ford Racing Speedometer Recalibration Tool is an inexpensive way to fix this issue.

      This Motive Performance Plus Ring and Pinion Gear set will fit all 1999 to 2004 V6 Ford Mustangs equipped with a 7.5" rear end. A master bearing kit is recommended by most installers, especially on high mileage vehicles, see drop down option above.

      Installation note. The Ring and Gear Pinion kit will require a notched cross-pin for proper installation.

      Technical Note. Installation costs will vary, but a good rule of thumb is between $250 and $300. Be sure to work with a reliable shop that you trust for installations.

      Fitment: 1999 2000 2001 2002 2003 2004 Details

      MPN# F7.5-410

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (25)

      Write a Review

      Ratings Summary

      4.6 out of 5 overall rating from 25 customers

      Installation Time: Shop Install

      Installation Cost: $250-$500

      • February 27, 2018

        5 2002 V6 - RyanG Installation Time: Weekend

        Great Speed increase

        Had to cut down the spider gear pin in order to fit past the bigger 4.10 gear to lock them in place

        Helpful (2)
      • May 10, 2017

        4 2003 V6 - MustangZincKing17 Installation Time: Shop Install Installation Cost: $100-$250

        Seriously worth it!

        I just got my gears and install kit installed at a local mechanic shop (250.00) not a bad deal at all! Only problem they came across was the "Cross shaft pin" didn't fit correctly. And I'm talking about the original one.. please please please,if you buy these gears buy that cross shaft pin on It's a must for the 7.5 rear ends. Yes it's 49.99 but it's worth it and like my mechanic did for me,he put it in for free. (You could get that luck too) Don't go cheap on this,and you won't have any issues:)

        Helpful (4)
      • July 24, 2016

        5 2000 V6 - skins


        excellent set of gears. made my car accelerate better

        Helpful (3)
      • February 04, 2016

        5 2002 V6 - Ethan Installation Time: Shop Install


        Great way to wake up your Mustang! Came very well packaged and in less than a week.

        Helpful (3)
      • February 01, 2013

        5 2000 V6 - welxx Installation Time: Shop Install Installation Cost: $500-$1000

        4.10 Gears

        The 4.10 is definitely different. It takes getting used to. Yes, it does rev higher, but that's no surprise. You get through the gears very quickly. Here's the truth. At a traffic light, when the light goes green, I have to get into 2nd gear before I cross the street. I'm in 4th gear by 40 mph. I've only had it for 4 hours so I haven't gone above 70 yet and only 2 races tonight. That's taking it easy. Can't wait till I've broken them in. Keep in mind that wasn't the only change made at the same time. Also added posi, aluminum drive shaft and Bama tune. So it's like learning to drive it all over again. I've had my car for 13 years and will always have it. Getting used to shifting much sooner is the task at hand. I've had 3.55 and 3.73 gears. 3.73 is probably more drive-able but I'll stick with the 4.10.

        Helpful (5)
      • October 01, 2010

        1 - Dan B.

        Absolutely terrible

        took these to a shop to get professionally installed and they said the pinion thread was not right so they cannot tighten it. Probably going to have to return them and buy Ford Racing gears. Car is ripped apart right now and wont be able to drive it until I get something to put in. DO NOT RECOMMEND!!!

        Helpful (3)
      • April 28, 2010

        5 - Gillian


        These gears are awsome, I get so much acceleration in my first three gears now with only a little drop in mpg. This is a great product with Limited Slip Differential. Smokin them ricers all the time now. lol

        Helpful (14)
      • April 19, 2010

        3 - JEAN

        its a mess but worth it to install

        Well i bought these and when i went to install them i noticed some problems. the number one problem was that the cross shaft pin absolutely has to be grinded down if you do not buy the posi trac diffriental. the ring gear is alot thicker than that of the stock 323 gears. another thing is that the recommended parts does not say anything about this. TRUST ME IT IS A MESS TO INSTALL BY YOUR SELF BUT WELL WORTH THE POWER DIFFERENCE. IT IS NICE TO SHIFT INTO FOURTH GEAR AND HEAR A BARK WITH BRAND NEW TIRES LOL AND BY THE WAY EVERY ONE THAT COMPLAINS ABOUT THE WHINING NEEDS TO CHECK THEIR BACK LASH ON THEIR CRUSH SLEEVE BECAUSE THAT IS WHAT CAUSES IT TO WHINE

        Helpful (6)
      • March 23, 2010

        5 - Ryan M

        4.10 Gears (V6)

        Got these installed and at first I was taking it easy on the car and began to wonder why I'd bothered getting the gears. Then I stepped on it and that was the moment I fell in love. The car pulls much better combined with the 7.5" Tlok.

        Helpful (3)
      • March 18, 2010

        5 - John Broman

        4.10 Gears On V6

        What a difference Gears can make to a V6 Mustang, The moment i first drove it after the Install it was an immediate difference in acceleration threw every gear this is how it should be Great Product Thanks American Muscle.

        Helpful (3)

      Questions & Answers (3 answers)

      3 Top Rated Questions


      • Yes these work with an automatic

      Helpful (0)

      Gains without a posi What kind of gains in 0-60 could I get without a limited slip differential?

      • Without posi, that one tire will be spinning all day long. If u do alot of hiway driving I'd go with a 3.73. Also motive is know to have a lot of whine while driving. Go with a ford racing gear! As for gains I can't tell you an exact time. But it definitely is the biggest bang for your buck for performance mods.

      Helpful (0)

      Will these Motive 4.10 gears fit inside this? Since the Ford Racing T-Loc is no longer available, I'd like to know if these 4.10 gears will fit with the Auburn HP Series Limit Slip Differential - 28 Spline 7.5in before I plop down the cash.

      • Yes, any gears made for 7.5in differentials should work.

      Helpful (0) Show 1 more answer
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      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Ring gear
      • (1) Pinion gear

      Tech Specs

      Will It Fit My Mustang

      • V6 - 99, 00, 01, 02, 03, 04

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