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Motive Performance Plus 3.73 Gears (99-04 V6)

19 Reviews
Our Price

$169.99

  • Item #21107G99
  • MPN# F7.5-373

  • Market Price $179.99
  • You Save 6% ($10.00)
In Stock Ships same business day.
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Customer Photos
Features
  • Superior quality
  • CNC-cut from 8620 gear steel
  • 3.73 Gear Ratio
  • 7.5" Ring Gear Diameter
  • For street or track use
  • Fits 1999-2004 V6 Mustangs
Description
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 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.

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.

Mustang Fitment: 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (1) Ring gear
  • (1) Pinion gear
Installation Info
Will it fit my Mustang?
  • V6 - 99, 00, 01, 02, 03, 04

Most Helpful Reviews Read All Reviews

Overall Rating 4.9/5 Write a Review
5/5
big time must

got this 3.73...came from factory 3.27...2000 v6 mustang 5sp... i only lost 300 rpms..65mph is now 2250 rpms..factory was 1950... definatly is a whole lot quicker getting into the "power band" also got

Read More
Helpful (8) (0)

5/5
one word "awsome"

put gears in,took just a few hours.Did the 500 mile break in.Now i race all over town! I love the new power.Thanks,American Muscle.Im glad i went with the 373,perfect fit for my daily driver!!

Helpful (5) (1)

Customer Photos (3) View All Customer Photos

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Q & A (3 Questions, 7 Answers) Ask a Question

Do you really need a tune after ?

TaylorWakeham Year: 1999 Model: V6

Question Resolved
Good Question (1) (0)
  • Short answer is no. However, you're speedometer will be off. If you go forward with this, I recommend the master install kit and Royal Purple fluid. If using RP, no friction modifier is necessary. Also, after cleaning the mating surfaces on the differential and cover, use black RTV to create a seal and DO NOT use the gasket, as it will almost certainly leak.

    Helpful (0) (0)

    Tracy67 Year: 2004 Model: GT

    Top 50 Contributor

Show 1 more answer

will there's gears fit is a stock rear end or do i have to get a bigger rear end?

2000v6 Year: 2000 Model: V6

Question Resolved
Good Question (0) (0)
  • These new gears will fit in your stock rear without any problems. Installing these will throw off your speedo though, so I recommend getting a new tune to correct for that. Also, it's a great idea to get the installation and bearing kit and the necessary gear oil for a perfect install. Combining these gears with an LSD would be an awesome combo for your V6, putting all your power to the pavement and eliminating those 1 wheel burnouts! Best of luck!

    Helpful (1) (0)

    LisaS Year: 1992 Model: GT

Show 1 more answer

or 4.10 I have a v6 daily driver. Do minimal high way driving. Which set would go best?

Corbs Year: 2004 Model: V6

Question Resolved
Good Question (0) (0)
  • I personally like 3:73 ratio however if you don't do much highway driving and looking for the most from standing start acceleration then the 4:10 ratio is best.

    Helpful (0) (0)

    MGCSR Year: 1997 Model: GT

    Top 1000 Contributor

Show 2 more answers

Reviews (19) Write a Review

  • 5 Stars .95 95%
  • 4 Stars .05 5%
  • 3 Stars 0 0%
  • 2 Stars 0 0%
  • 1 Stars 0 0%
4.9

out of 5 stars

19 Customers Recommend this Product

Installation Time:Weekend

Installation Cost:$500-$1000

  • Performance Gain: 5 5/5
  • Fit: 5 5/5
  • Bang For Your Buck: 5 5/5
Filter By Sort By
  • 5/5 Yes, I recommend this product

    January 11, 2011

    big time must

    got this 3.73...came from factory 3.27...2000 v6 mustang 5sp... i only lost 300 rpms..65mph is now 2250 rpms..factory was 1950... definatly is a whole lot quicker getting into the "power band" also got the t-lok with it...best thing i have done so far to this car..well other than getting the wireless tuner for it :) thanks AM !!

    justin p

    Year: 2000 Model: V6 Driving Style: Street / Strip

    Helpful (8) (0)

  • 5/5 Yes, I recommend this product

    November 03, 2009

    one word "awsome"

    put gears in,took just a few hours.Did the 500 mile break in.Now i race all over town! I love the new power.Thanks,American Muscle.Im glad i went with the 373,perfect fit for my daily driver!!

    colleen hartman

    Helpful (5) (1)

  • 5/5 Yes, I recommend this product

    July 08, 2008

    Wow

    I bought these gears along with the installation kit, and Royal Purple fluid. This really woke the car up. I do a lot of highway driving and noticed no change in noise or fuel economy. An SCT tuner will allow you to correct your speedometer and get some extra power at the same time.

    Ron B

    Helpful (3) (0)

  • 5/5 Yes, I recommend this product

    June 26, 2008

    NASTY

    These gears are exactly what the title says, nasty! All together it was around $750 for the works, however, I do recommend getting a posi-traction differential. My car is a lot more fun to drive now.

    Tyler Malek

    Helpful (2) (0)

  • 5/5 Yes, I recommend this product

    May 15, 2011

    Motive Performance Plus 3.73 Gears (99-04 V6)

    I ordered these gears with an install/bearing kit for my 01 V6 Convertible and WOW! what a difference it made. Don't fet me wrong it's still not my GT but it really woke it up! Great upgrade and bang for the buck!

    Dominic

    Year: 2001 Model: V6

    Helpful (3) (1)

  • 5/5 Yes, I recommend this product

    March 24, 2010

    REAL POWER

    373,perfect fit for my V6 The difference is much, now runs with more power with better acceleration THANK YOU AMERICAN MUSCLE

    JUNIOR

    Helpful (3) (1)

  • 5/5 Yes, I recommend this product

    April 19, 2011

    V6 Auto w. TLok

    Major improvement in acceleration. I installed these myself which saves me a lot of money, and it wasnt to hard to install just have to make sure backlash and preload is correct or else they will whine. If your like me and you want hard launches get the 4.10 gears or upgrade the rear end to a 8.8 and get even higher gears. I really like these gears but wished i swapped rear ends and wint with 4.30 gears.

    dakota

    Year: 2001 Model: V6 Driving Style: Daily Driver

    Helpful (4) (3)

  • 5/5 Yes, I recommend this product

    November 08, 2007

    great gears!

    These gears are awesome. They don\'t whine or anything, I have about 5-10k miles on them so far and no problems! it woke my sixer up.

    John

    Helpful (0) (1)

  • 5/5 Yes, I recommend this product

    March 16, 2011

    well worth the money

    I added this to my stang along with a ford racing tlok and a 4 bank elim chip. i must say installing all of it was a process. make sure you get the right backlash in the gears and compound mesh and your set. id get professional help if you dont have the tools. great acceleration and performance. makes GTs jealous now

    shawn

    Year: 2000 Model: V6 Driving Style: Daily Driver

    Helpful (0) (2)

  • 4/5 Yes, I recommend this product

    February 17, 2011

    Woke the pony up!

    This was a great product. Made my V6 really fly.. Only thing I didn't like is that it didn't come with and spacers or any of the bearings or crush collar that are pretty much mandatory. I wouldn't recommend doing rhis yourself unless you are a very experienced tech with a hoist. Don't count on finishing it in 1 day either. Took 2 buddies and I 2 7 hr. Days with a hoist. Very pleased with the product thus far. Just doin the 500 mile break in.

    Brad Coxe

    Driving Style: Daily Driver

    Helpful (0) (2)

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