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Motive Performance Plus Ring Gear and Pinion Kit - 4.10 Gears (86-93 GT)

Market Price $252.99 You Save 25% ($63.00)
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  • Item 21103G87
  • MPN# F888410

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Features & Details

  • Superior Quality
  • CNC-Cut from 8620 Gear Steel
  • 4.10 Gear Ratio
  • 8.8" Ring Gear Diameter
  • For Street or Track Use
  • Fits 1986-1993 GT and 5.0 LX Mustangs
Improve Overall Performance. Wake up your V8-powered Pony and get better acceleration off the line with a set of steeper gears. These high quality 4.10 gears from Motive will give your Mustang more pull off the line and get you into your power band faster for quicker quarters and lower ET's.

Superior Construction & Precision Fit. 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. Unlike other brands, Motive Gears do not have a reputation for "gear whine".

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

Application. This Motive Performance Plus 4.10 Ring and Pinion Gear set will fit all 1986 to 1993 V8 Mustangs including the GT, LX 5.0 and Cobra models. 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, see drop down option above.

Fitment: 1986 1987 1988 1989 1990 1991 1992 1993 Details

What's in the Box
  • (1) Ring gear
  • (1) Pinion gear
Installation Info
Tech Specs

Approximate RPM for 1986-1993 GT

Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4261 5965        
2 2516 3523 4529 5535 6542  
3 1682 2354 3027 3700 4372 5045
4 1264 1770 2276 2782 3287 3793
5 847 1186 1525 1864 2203 2541

Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 3034 4248 5462 6676    
2 1854 2596 3338 4080 4821 5563
3 1264 1770 2276 2782 3287 3793
4 843 1180 1517 1854 2192 2529
Will it fit my Mustang?
  • Foxbody - 86, 87, 88, 89, 90, 91, 92, 93

Most Helpful Reviews

Plan First...

These 4.10 gears from Motive were the third modification I had done to my GT. The difference in acceleration was very noticeable. One thing everyone warned me about was a drop in fuel efficiency, which ...

Read More
Helpful (4)

Not bad

Great price on the gears! They work well. Overall, worth it.

Helpful (1)

Overall Rating 5 out of 5 stars
Read All 11 Reviews

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Customer Reviews (11) Write a Review

Overall Rating 5.0

out of 5 stars

  • 5/5

    August 15, 2008

    Plan First...

    These 4.10 gears from Motive were the third modification I had done to my GT. The difference in acceleration was very noticeable. One thing everyone warned me about was a drop in fuel efficiency, which I did not see. The gears allow the engine to operate at a more efficient speed, which won\'t really affect mileage if you keep your foot out of it. Another common misconception is a drop in \"top speed.\" That is totally false. Your top achievable speed will actually increase now that the engine will be operating at a slightly higher rpm. Sure, the top redline speed is lowered to 156, but unless you can run 8\'s in the 1/4 mile, you have nothing to worry about. These gears did have a little bit of whine, mostly heard when no load was placed on them (coasting). Unless you hear excessive whine (almost like a loud hum heard at all times), you have nothing to worry about. I recommend you give these gears a couple of heat/cool cycles before putting the pedal to the floor. That hardens them up. Lastly, plan things out before you get 4.10s. For an N/A Mustang, they provide a good increase in acceleration at the cost of 500 rpms. If you plan on supercharging your Mustang, I urge you to consider 3.73s. Overall these are a very good set of gears, and ideal for most Mustang owners. I recommend purchasing the differential bearing kit with these gears.

    Chris V

    Helpful (4)

  • 5/5

    May 20, 2008

    Not bad

    Great price on the gears! They work well. Overall, worth it.

    Matt P.

    Helpful (1)

  • 5/5

    September 14, 2010

    Motion 4:10 Gears

    These gears are quiet and smooth and make your car feel like someone hid a big block under your hood!

    Jim Wyche

    Helpful (0)

  • 5/5

    August 22, 2010

    Great Gears

    if you have a mustang with an 8.8 rear axle, you have to have these gears, it is NIGHT AND DAY, just from these gears alone i saw a huge increase in power all across the powerband


    Helpful (0)

  • 5/5

    August 21, 2010


    have the 4.10's with my supercharger and WHOOO DOGGY you wanna talk about BANG for your buck, good lord, this is worth the money folks, what are you waiting for? Time to get serious? These gears will give you something to be proud of


    Helpful (0)

  • 5/5

    November 04, 2009

    LoOoOve It

    makes your car really fun to drive. i really recommend to get the bearing kit with this part. it would make your life easier in installing them + no ugly noise afterward.

    sharaf Malebary

    Helpful (0)

  • 5/5

    August 07, 2009


    love the 4.10's, i've used both Ford Racing, and the Motive gears in 3.73 both with the motive gear bearing kit and have no problems at all, no while no clunking, awesome customer service and shipping was very fast, at the best price i could find


    Helpful (0)

  • 5/5

    March 23, 2009


    go with ford racings gear(At least thats what my shop told me). These gears whine. It annoys me, if it doesnt annoy you then buy them. The 4.10 and the tune made the car so stupid fast. Just got my first ticket in them!!!! LOL. That\'s why i give the 4.10\'s a five star! Definitly needs to be first mod

    matt r.

    Helpful (0)

  • 5/5

    February 02, 2009

    Nice stuff

    Great product. Really noticeable with a new LCD. I love em! Get the Predator Diablo tuner to go with, it is awesome.


    Helpful (0)

  • 5/5

    June 05, 2008


    I had these installed last night and WOW! Well worth it.

    Scott Headley

    Helpful (0)

  • 5/5

    September 24, 2007


    Hands down one of the best mods you can do on a Non-PI mustang. All I can compair it to is, it feels like the car has a shot of nitrous. Once again has the best/fastest shipping times around!

    Matthew Brooks(red281gt)

    Helpful (0)

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