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Motive Performance Plus 3.73 Gears (79-85 V8; 86-10 V6)

13 Reviews
Our Price

$169.99

  • Item #21107
  • MPN# F7.5-373

  • Market Price $179.99
  • You Save 6% ($10.00)
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Features
  • CNC-cut from 8620 gear steel
  • For street or track use
  • Superior quality
  • 3.73 Gear Ratio
  • Fits 79-85 V8 & 86-10 V6 Mustangs
  • 7.5" Ring Gear Diameter
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 1979 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. You can also save money on your installation labor by having your Trac-Lok rebuilt at the same time as your gears are installed.


Installation & Tech
Differential Gears - Installation Instructions! Differential Gears - Installation Instructions! Mustang Rear Gears - Tech Article Mustang Rear Gears - Tech Article

Mustang Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Details

What's in the Box
Hardware included:
  • Ring
  • Pinion
Installation Info
Will it fit my Mustang?
  • Foxbody - 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10

Fits Mustangs equipped with a 7.5" rear end

Most Helpful Reviews Read All Reviews

Overall Rating 4.9/5 Write a Review
5/5
less slow!

I had to rebuild the rear end of my mustang so I figured I would throw in some lower gears to get some more pep from my slow single port. I am very happy with the result, the acceleration is much better.

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Helpful (9) (0)

5/5
Worth It, Does The Job

I bought 3.73 Gears for my V6, I decided to stay with the 7.5in rear. But I must say, the gears do a VERY noticeable difference in acceleration off the line and in the low-mid RPM range. These gears wont

Read More
Helpful (7) (1)

Customer Photos (3) View All Customer Photos

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Q & A Ask a Question

Manual vs automatic My 3.8 with 7.5' gear is an automatic. I have read confusing statements about going to the 3.73 gears. Some have said that it is pointless with an A/T car, there are no benefits. To me, final drive is final drive, auto or not. So is there something about how A/T works that nullifies the benefit of a lower gear?

Knievel6 Year: 2002 Model: V6

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Good Question (0) (0)

Reviews (13) Write a Review

  • 5 Stars .92 92%
  • 4 Stars .08 8%
  • 3 Stars 0 0%
  • 2 Stars 0 0%
  • 1 Stars 0 0%
4.9

out of 5 stars

13 Customers Recommend this Product

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  • 5/5 Yes, I recommend this product

    May 29, 2009

    less slow!

    I had to rebuild the rear end of my mustang so I figured I would throw in some lower gears to get some more pep from my slow single port. I am very happy with the result, the acceleration is much better. The down side is that at 65mph im at 2500rpm (5spd). At least it keeps me from getting speeding tickets on the freeway.

    Joe

    Helpful (9) (0)

  • 5/5 Yes, I recommend this product

    May 15, 2009

    A must!

    This product is a definite MUST a long with the T-lock to V6 enthusiasts! If you want more bang for your buck, then this is surely your item!

    Nikky

    Helpful (7) (1)

  • 5/5 Yes, I recommend this product

    June 15, 2008

    Worth It, Does The Job

    I bought 3.73 Gears for my V6, I decided to stay with the 7.5in rear. But I must say, the gears do a VERY noticeable difference in acceleration off the line and in the low-mid RPM range. These gears wont hurt your MPG either, it will be near stock. Dont waste your money on FRPP gears or others, Motive Performance is an inexpensive and reliable way to go to upgrade gears. Also, gears only whine if the technician doesnt take the time to align them correctly. Definitely recommended though.

    Andrew F.

    Helpful (7) (1)

  • 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 (4) (0)

  • 5/5 Yes, I recommend this product

    February 19, 2010

    Great Mod

    Great mod albeit expensive with POSI, bearing kit and a $ 430 prof. installation. It was worth waiting and saving. It really gives a boost to your V6. After long search on Inet, AM provided the best prices for these parts.

    Fabian Hug

    Helpful (4) (1)

  • 5/5 Yes, I recommend this product

    November 18, 2008

    One beefy ring

    Got this along with my T lock. Talk about one solid piece of equipment!

    Keith

    Helpful (2) (0)

  • 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 (2) (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

    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 (2) (0)

  • 5/5 Yes, I recommend this product

    January 02, 2011

    More Get Up And Go!!!!

    Bought and had these installed by a professional in my 5 speed 2000 v6 mustang along with the 7.5 28 T-LOK slip differential and felt the difference immediately. A must buy for anyone with a v6 looking for better acceleration and handling, their even better when combined with a custom tune. For those of you who want to buy the gears and the T-LOK and are wondering how much it will cost at a garage to have BOTH installed it will be around $500.00-$600.00 just for installation but worth it.

    Johnathon May

    Year: 2000 Model: V6 Driving Style: Daily Driver

    Helpful (1) (0)

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