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Motive Gear Performance Plus Ring and Pinion Gear Kit - 3.73 Gear Ratio (05-10 V6)

Item 21107G05
Market Price $257.99 You Save 12% ($30.51)
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      Review & Installation Video

      Product Information

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


      • Superior Quality
      • CNC-Cut from 8620 Gear Steel
      • 3.73 Gear Ratio
      • 7.5" Ring Gear Diameter
      • For Street or Track Use
      • Fits 2005-2010 V6 Mustangs


      Improve Performance. Wake up your V6-powered pony for faster acceleration off the line with a set of 3.73 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.

      3.73 Gear Ratio. 3.73 gears are a great combination of performance and fuel economy that's ideal for a daily-driven 'Stang that sees a lot of highway time. If you put a lot of miles on your Pony and don't want to increase your cost at the pump, a 3.73 ratio will still give you the added acceleration you want without compromising fuel economy dramatically.

      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 2005 to 2010 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.

      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: 2005 2006 2007 2008 2009 2010 Details

      MPN# F7.5-373

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (24)

      Write a Review

      Ratings Summary

      4.6 out of 5 overall rating from 24 customers

      Installation Time: Weekend

      Installation Cost: $250-$500

      • December 19, 2019

        4 2008 V6 - JT8101997 Installation Time: Shop Install Installation Cost: $250-$500

        Worth the performance

        When I picked the car up from the shop after installing I only made it about a block away before I brought it back with how loud they were screaming. They took a look at it and said the axel was slightly out of position by accident and fixed it for free. After that there's a very slight whine but you can barely hear it even with the radio off and it doesn't bother me in the slightest. So if they make a lot of noise for you, bring it back to the shop or take another shot at it yourself before you drive too far and wear the pattern in. Performance wise these were a decent improvement in low end acceleration. My only issue now is getting the speedometer reprogrammed but it's only off by about 3mph and that should be an easy fix.

        Helpful (1)
      • May 05, 2018

        5 2006 V6 - AlvinM Installation Time: Full Day


        Loved it, there was a noticeable difference in performance...

        Helpful (2)
      • July 09, 2017

        4 2007 V6 - RichW Installation Time: Shop Install Installation Cost: $250-$500

        3.73 gear

        i did like this gave me a better hole shot out the gate.

        Helpful (2)
      • June 26, 2017

        5 2006 V6 - Dallas

        Love it

        Made a big difference. would refer these to anyone

        Helpful (2)
      • June 19, 2017

        4 2005 V6 - Codith Installation Time: Afternoon

        Not what I expected

        "This will wake your pony up" is a bit overboard here. It didn't give me that I CAN'T LIFT MY HEAD FROM THE SEAT that I thought it would based on the reviews of these in comparison to the 4.10's. Also, noisy set of gears. I had them installed at a shop that specializes in rear ends, yes they were put in correctly with new bearings etc.. Just a sliiight whine when I'm light on the pedal that is annoying. Wish I read more reviews on the Motive and not just the product, seems they're almost always somewhat noisy.

        Helpful (3)
      • August 14, 2016

        5 2005 V6 - Jd


        Great gears. Worth the money. Def woke up my v6 . paired with it a new posi diff works Awsome. Drives like a v8 now. No more one wheel burn out . 2 wjeel burn outs for now on.

        Helpful (5)
      • July 25, 2016

        5 2007 V6 - Alec


        Totally different car, had them installed at the shop and right away you can feel the acceleration difference so happy with the purchase I would recommend getting a set!

        Helpful (4)
      • July 11, 2016

        2 2008 V6 - Wawa

        Depth off smdh

        Great set of equipment had it installed in the shop do not have the tools to do overhaul jobs. The mechanic told me it was a big set they had to shave it down a bit put it in and was making a chattering even tho I used RP gear oil and friction modifier it chartered when coasting acceleration and deceleration I've taken it back before and they claimed they fixed it but it's still making so much noise smdh

        Helpful (3)
      • October 05, 2012

        4 2008 V6 - SCMustang Installation Time: Shop Install Installation Cost: $250-$500

        Motive 3.73 Gears

        Had these gears installed along with the T-LOK from FRPP at a local performance shop. After install the shop owner noted that although the gears were installed to spec, there is a whine when cruising at a constant speed, but not while accelerating or decelerating. It took some getting used to, especially on the freeway when it get very loud.

        Helpful (5)
      • February 18, 2012

        4 2007 V6 - fasteddie64 Installation Time: Shop Install

        Gear Upgrade

        I recently had Motive 3.73's put in my Stang along with a Ford Trac-Loc Posi. I took it to a shop being I didn't have the tools required to set the pinion depth. This is critical to avoid "Gear Whine", to deep or shallow and you will get noise on accell. or decell. On to the good part the gears they are top notch and fit great and are stronger than stock. After 500 miles break in they really surprised me. I have a whole different Mustang, rolling slow and punch it both tires break loose and a little sideways drift. From a dead stop it jumps like a cougar pouncing in for the kill, it has so much more "BALLS"!! And yes I have a automatic and the shift from 1st to 2nd chirps V-6. And that was without my Bama Tuner. Don't be tempted to get the 4:10's unless you plan to drag race every weekend you'll run out of wind up top showing who's who on the Interstate and Highways. GEARS SHOULD BE YOUR FIRST UP GRADE AND POSI IF YOU CAN SWING IT!! Hey and if I'm wrong I'll eat my hat!. The best MONEY I ever SPENT Hands Down, You won't be sorry, End Of Story!!!!

        Helpful (16)

      Questions & Answers (7 answers)

      5 Top Rated Questions

      I have a 2008 V-6 automatic and need to replace the rear. I was thinking of these gears. However, is a tune required or recommended?

      • The installation of the Motive Performance Plus Ring Gear and Pinion Kit - 3.73 Gears will require your speedometer to be recalibrated and this can be done with either a tuner or a speedometer recalibration tool.

      Helpful (2)

      I drive a 2007 auto V6. Dual exhaust, BBK CAI and more to come. How bad do the 3.73 gears ruin gas mileage in city and highway driving at normal speeds? Obviously speeding/hard accelerating will make an impact, but what about just normal driving? Is there anything else to worry about with 3.73 gears? any potential hazards to the car or is it just gas mileage? Thanks in advance!

      • Hello! You will notice more of a decrease in mpg during highway driving. With higher mileage mustangs, it is recommended to add a bearing kit for installation. The gears will also throw off your speedometer, but ford racing has a re-calibration tool to fix it.

      Helpful (2)

      0-60 times What kind of 0-60 gains would a midly modded 2008 v6 (gms coil,taylor wires, NGK spark plugs, BBK cai, american thunder axleback, all without a tune-soon to come) see with these gears.

      • The stock specs are 0-60 mph : 6.6 sec.(manual), 6.9 sec.(auto). How much time the gears shave off depends on many variables. The driver, tires, temp, the gas, do you have a Posi-Traction Rear, do you have a tuner that has adjusted your shift points? It will make a big difference on how the car accelerates. I have the same set up in my car but I put a Posi-Traction Differential in and the hook up is awesome. Also if you are getting a Bama Tuner (I did) they can adjust your speedometer for the new gears. I was able to cut my 0-60 by 0.8 to 1.0 sec depending on the day with a Automatic Trans.

      Helpful (2)

      I purchased the 3.73 gears and there was a noticeable difference in performance. I'm thinking about a 3000 torque converter. They are hard to find and pricey, is it worth the time, effort and expense....

      • A new and better torque converter would be a good buy if your car is running a higher stage cam. However if your cams are stock your stock torque converter would be just fine!

      Helpful (1) Show 1 more answer

      I had these 3.73 gears installed a week ago and am getting a LOT of gear whine. The shop that did the install is a driveline specialty shop with a good reputation. I called them to ask about the gear whine and they said, "That's normal for these aftermarket gears. It will probably die down over time." Is anyone else experiencing the same thing?

      • When installing new gears you will have a whining sound coming from them for the first few thousand miles until the gears are broken in. Within this period you will also want to do easy driving to break the gears in.

      Helpful (1)
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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 - 05, 06, 07, 08, 09, 10

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