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

Market Price $257.99 You Save 12% ($30.51)
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  • Item 21101G99

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    Features & Details

    • 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.

    Application. 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 -

    What's in the Box
    • (1) Ring gear
    • (1) Pinion gear
    Installation Info
    Tech Specs
    Will it fit my Mustang?

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    Questions & Answers (3)

    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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    Customer Reviews (25) Write a Review

    Overall Rating 4.6

    out of 5 stars

    Installation Time:Shop Install

    Installation Cost:$250-$500

    • Performance Gain 4.75 4.8
    • Fit 4.25 4.3

    • 5/5

      Installation Time: Weekend

      February 27, 2018

      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


      Year: 2002 Submodel: V6

      Helpful (2)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      May 10, 2017

      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:)


      Year: 2003 Submodel: V6

      Helpful (3)

    • 5/5

      July 24, 2016


      excellent set of gears. made my car accelerate better


      Year: 2000 Submodel: V6

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      February 04, 2016


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


      Year: 2002 Submodel: V6 Leawood, KS

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $500-$1000

      February 01, 2013

      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.


      Year: 2000 Submodel: V6 Gilbert, AZ, USA

      Helpful (5)

    • 1/5

      October 01, 2010

      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!!!

      Dan B.

      Helpful (2)

    • 5/5

      April 28, 2010


      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)

    • 3/5

      April 19, 2010

      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)

    • 5/5

      March 23, 2010

      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.

      Ryan M

      Helpful (3)

    • 5/5

      March 18, 2010

      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.

      John Broman

      Helpful (3)

    • 5/5

      March 06, 2010


      I had this installed with a T-Lok. After a day of driving, I still have a stupid smile i can't get rid of. American Muscle is the Best. Can't wait to get my tuner and CAI.

      Bill Waudby

      Helpful (8)

    • 4/5

      February 05, 2010




      Helpful (5)

    • 5/5

      January 27, 2010


      great addition to any v-6 owner's mustang. Brings an entirely different feel to the car.


      Helpful (3)

    • 5/5

      October 16, 2009

      4.10's & Royal Purple

      Bought these and put them in along with a couple of other mods and put royal purple gear lube in to make sure they would set better and the result?? Roasting both tires like a Gt and getting around a whole lot faster! The only downfall is that if they arent set to the exact point then the driveshaft gets out of balance and you have to buy a coastline 4" 1 piece aluminum cause it will vibrate you to death if you dont!


      Helpful (3)

    • 5/5

      October 09, 2009


      These really wake your pony up big time. Be sure you have a tuner or your speedometer will be off by about 15mph. Also be sure to be very gentle with your throttle for the first 500 miles or you'll break your gears.


      Helpful (3)

    • 5/5

      September 07, 2009

      OH YEAH!!!

      These gears have been the best modification I have done to my car. Linked to my 5 speed my car feels like a rocket now!!! REALLY fast shipping too!!!

      Paul Schacknies

      Helpful (2)

    • 5/5

      August 29, 2009

      Pucnh it!

      These gears really gave my v6 a new life. The acceleration is far better then stock. I'm running these on a manual tranny, and it is fun!


      Helpful (3)

    • 5/5

      August 26, 2009


      I had to get my gears from somewhere else because I couldn't wait for restocking but AM still has the best price with free shipping. I had to do a small grind on the cross shaft pin after setup was complete to finish up the install. motive's site states that a special cross shaft pin is needed with these gears. a grind hooked it up though. overall, great! the accelleration is awesome and there is no whining or grinding.

      Jamar Risinger

      Helpful (4)

    • 5/5

      July 16, 2009


      these gears really woke up my v6 it was the best bang for the will not regret buyin these gesars


      Helpful (2)

    • 5/5

      May 28, 2009

      Thank You

      Just want to say thanks to Frank C. for the layout of each gear. It\'s nice to know what I will be getting myself into before the purchase.

      Rob B.

      Helpful (2)

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