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Yukon Gear Ring Gear and Pinion Kit - 3.73 Gears (79-85 V8)

Market Price $262.77 You Save 12% ($30.23)
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$232.54

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  • Item 393209G87
  • MPN# YG F7.5-373

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    Features & Details

    • 3.73 Gear Ratio
    • 7.5" Ring Gear Diameter
    • Superior Quality
    • Premium Grade 8620 Triple Alloy Steel
    • Ideal for Street and Track Use
    • Fits 1979-1985 V8 Mustangs
    Improve Performance. Add more low end grunt to your classic V8-powered Fox Body Mustang by installing a set of 3.73 Yukon Gears. A set of steeper rear Gears will place your Pony into the power band much quicker for faster off the line acceleration. These Gears are ideal for both street and track applications.

    3.73 Gear Ratio. 3.73 gears are a great combination of performance and fuel economy that are ideal for a daily-driven Mustangs that see 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 dramatically compromising fuel economy.

    Quality Construction. Made from incredibly durable forged 8620 triple alloy steel for superior strength, Yukon backs their Ring and Pinion with a 1-year limited warranty. Yukon also takes full advantage of the most up to date state of the art technology in their design and manufacturing process. No matter how you look at it, this gear set is built to last.

    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 3.73 Yukon Ring and Pinion Gear set will fit all 1979 to 1985 V8 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: 1979 1980 1981 1982 1983 1984 1985 Details

    CA Residents: Warning: California's Proposition 65

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

    Approximate RPM for 1979-1985 GT


    Manual
    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 3876 5427 6977      
    2 2289 3205 4120 5036 5951 6867
    3 1100% 2142 2754 3366 3978 4590
    4 1150 1610 2070 2531 2991 3451
    5 771 1079 1387 1695 2004 2312


    Automatic
    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 2761 3865 4969 6073    
    2 1687 2362 3037 3712 4386 5061
    3 1150 1610 2070 2531 2991 3451
    4 767 1074 1380 1687 1994 2301
    Will it fit my Mustang?

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    Questions & Answers (1)

    1 Top Rated Question

    Will these gears fit an 88 LX 5.0L

    • These Yukon Gear 3.73 Gears are designed for the 7.5" rear axle, for the 1988 LX 5.0L you would have an 8.8" rear. At this time we do not offer any 3.73's for your car from Yukon Gear. We do offer 3.73's from Ford Perfomance (Item #24001G87) Excel from Richmond (21526G87) and Richmond (66501G87)

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    Customer Reviews (1) Write a Review

    Overall Rating 5

    out of 5 stars

    Installation Time:Shop Install

    Installation Cost:$250-$500

    • Performance Gain 5 5
    • Fit 5 5



    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      November 12, 2016

      Wow! Should be everyone's first mod!

      Out of all the aftermarket and engine mods on my 85 gt, this is the most cheapest and most noticeable one by far! My car is a beast with this ratio, little price but it's Yukon and it's for a odd year mustang as well, hard to come by for good quality, thanks American muscle. You guys are always looking out!

      zayy5224

      Year: 1985 Submodel: GT

      Helpful (3)

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