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Ford Performance Ring and Pinion Gear Kit; 3.31 Gear Ratio (99-04 Mustang GT)Find parts that fit my vehicle

Item 50470G99
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$202.99

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    Frequently Bought Together

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation

      Features & Specs

      • Ford Racing Quality
      • Strong Forged Construction
      • 3.31 Gear Ratio
      • 8.8" Ring Gear Diameter
      • For Street or Track Use
      • Fits 1999-2004 GT, Bullitt and Mach 1 Mustangs

      Description

      Upgrade OEM Gears. Are you looking to upgrade to a stronger set of rear gears? Then look no further than installing a set of genuine Ford Racing Gears in your Pony. Ford Racing Ring and Pinion Gears are perfect for street, road, and race applications.

      Superior Quality. Manufactured in the USA, these Ford Racing Mustang ring and pinion gears feature a super strong forged construction, CNC cut & lapped gear teeth, and are completed in a black oxide finish to resist corrosion.

      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 Ford Racing Ring and Pinion Gear set will fit all 1999 to 2004 4.6L V8 Mustangs including the GT, Bullitt and Mach 1 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.

      Ford Performance M-4209-88331

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (10) Differential housing cover bolts
      • (1) Differential housing cover
      • (1) Rear brake components
      • (1) Differential pinion shaft
      • (1) Differential pinion shaft lock bolt (remove and discard old bolt)
      • (1) Axle shaft U-washer
      • (1) Axle shaft oil seal
      • (1) Companion Flange Holding Tool
      • (1) Companion Flange Remover
      • (1) Soft-faced hammer
      • (1) Rear axle drive pinion seal
      • (1) Pinion Bearing Cone Remover
      • (1) Pinion Bearing Cone Replacer
      • (1) Differential case (ring gear removed) with differential bearings and bearing cups
      • (1) Dial Indicator with Bracketry TOOL-4201-C or equivalent
      • (1) Pinion Bearing Cup Replacer
      • (1) Rear axle pinion bearing cups (new)
      • (1) Drive Pinion Bearing Adjustment Shim
      • (1) Drive Pinion Bearing Adjustment shim set (0.254 mm to 0.965 mm thickness range)
      • (1) Rear Axle Pinion Depth Gauge Set 205-S127 (T79P-4020-A) including:
        • (1) Screw
        • (1) Differential Pinion Bearing
        • (1) Handle
        • (1) Alignment Adapter (1.612 Inch OD)
        • (1) Gauge Disc (1.884 Inch Thick)
        • (1) Gauge Block (1.700 Inch Thick)
        • (1) Gauge Tube
      • (1) Differential drive pinion collapsible spacer (new)
      • (1) Premium-Life Grease XG-1-C or equivalent meeting Ford specification ESA-M1C75-B
      • (1) Pinion Seal Replacer
      • (1) Maximum strength retaining compound (Loctite 638)
      • (10) New differential ring gear bolts
      • (1) Differential Shim Installer
      • (1) Marking compound (Motorcraft® High Contrast Hypoid Gear Marking Compound XG-14)
      • (1) New differential pinion shaft lock bolt
      • (1) Rear wheel speed sensor bolt
      • (1) Silicone sealant for differential housing cover
      • (2.84-2.98L) Motorcraft® SAE 75W-140 Synthetic Rear Axle Lubricant XY-75W140-QL or equivalent
      • (118ml) Friction Modifier additive XL-3 (4.0 oz.) (Traction-Lok® only)
      • (1) Driveshaft (reinstallation)

      4.9

      Customer Reviews (500+)

      Questions & Answers

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      Will It Fit My Mustang

      • Bullitt - 01
      • GT - 99, 00, 01, 02, 03, 04