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Motive Gear Performance Plus Ring Gear and Pinion Kit - 4.30 Gears (86-93 GT)

Item 21104G87
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    Features & Details

    • Superior Quality
    • CNC-Cut from 8620 Gear Steel
    • 4.30 Gear Ratio
    • 8.8" Ring Gear Diameter
    • For Street or Track Use
    • Fits 1986-1993 GT and 5.0 LX Mustangs
    Improve Overall Performance. Improve your V8-powered Mustang's off-the-line responsiveness with a set of 4.30 gears from Motive. Steeper gears get you into your power band faster for improved acceleration and lower times. A set of 4.30 gears are a great choice for the performance-oriented Pony that still needs to be driveable on the street.

    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 4.30 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

    MPN# F888430

    CA Residents: WARNING: Cancer and Reproductive Harm -

    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 4469 6256        
    2 2639 3694 4750 5805 6861  
    3 1764 2469 3175 3880 4585 5291
    4 1326 1856 2387 2917 3448 3978
    5 888 1244 1599 1955 2310 2665

    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 3182 4455 5728      
    2 1945 2723 3501 4279 5057 5835
    3 1326 1856 2387 2917 3448 3978
    4 884 1238 1591 1945 2298 2652
    Will it fit my Mustang?

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          Customer Reviews (3) Write a Review

          Overall Rating 5

          out of 5 stars

          • 5/5

            March 09, 2010

            Motive 4.30's

            Switched from 4.10s, and like these even better. I can only imagine how much I'd love them if I was still cruising around with 3.27's.


            Helpful (6)

          • 5/5

            February 04, 2009

            Motive is the way to go

            Great product, No gear noise and pulls really hard!

            Jordan D

            Helpful (5)

          • 5/5

            November 29, 2007

            Wake Up Call!!!

            If you are on the fence to go with 4.10\'s or 4.30\'s with your mustang (manual). I say go all out with 4.30\'s. At 70 mph my tach rides at just a hair under 2.5k. The car strait up scoots. (Take your time with install) No gear howl to report. Great product. (Bearing kit w/shims is a must.) Great buying experience. Have and will buy from American Muscle again!!!


            Helpful (6)

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