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Ford Racing 3.73 Gears and Install Kit (10-14 V8; 11-14 V6)

30 Reviews
Our Price

$279.99

  • Item #100573
  • MPN# 100573

  • Market Price $354.99
  • You Save 21% ($75.00)
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Customer Photos
Features
  • Money Saving Combo Kit
  • Ford Racing 3.73 Gears - 8.8"
  • Ford 8.8in Rear Gear Pinion Bearing
  • Motive 8.8" Rear End Installation and Bearing Kit
  • 1 bottle of Ford Racing Friction Modifier
  • 2 quarts of Royal Purple Max Gear 75w140 Gear Oil
  • Fits 2005-2014 V8 and 2011-2014 V6 Mustangs with 8.8" solid rear axle
Description
Improve ET's and low end torque. Are you looking to get more low end grunt off the line and lower ET's at the same time? Then look no further than installing a set of steeper gears in your Pony. This Ford Racing Ring and Pinion Gears are perfect for street, road, or race use.

Complete Kit. This Ford Racing Gear and Installation Kit comes complete with all the components needed to swap out your ring and pinion gear. It includes Ring gear, Pinion gear, inner rear gear pinion bearing, 1 bottle of Friction Modifier, 2 bottles of 75w140 Gear Oil, gaskets, seals, shims, bearings and all the required hardware.

Legendary Ford Racing Quality. When you're adding performance parts to your Pony, you can't go wrong by installing parts from the folks that know it best. Ford Racing's legendary quality ensures years of hassle-free use.

Recommended Upgrade. Changing the rear axle gear ratio will throw off the calibration of your Mustangs speedometer, but a Ford Racing Speedometer Recalibration Tool or a Bama SF4/X4 Power Flash Tuner is a quick and easy way to fix this issue.

Application. This Ford Racing 3.73 Rear Gear and Installation Kit is designed for use with 8.8in solid rear axle equipped Mustangs, including the 2005-2014 GT, Bullitt, BOSS, Shelby GT500 and 2011-2014 V6 models.

Application Note: Does not fit 2013 Boss or 2013-2014 Shelby GT500 Mustangs with axle codes S-215-D and S-219-D.

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: 2010 2011 2012 2013 2014 Details

Won't fit? Add an exception

What's in the Box
  • (1) Ring gear
  • (1) Pinion gear
  • (1) Rear Gear Pinion Bearing
  • (1) 3.8 fluid oz bottle of Friction Modifier
  • (2) one quart bottle of Royal Purple Max Gear 75w140 Gear Oil
  • Front & Rear Pinion Bearing
  • Pinion Seal
  • Carrier Bearings
  • Carrier Shims
  • Differential Bearings
  • Crush Sleeve
  • Pinion Nut
  • Cover Gasket
  • Ring Gear Bolts
  • Brush
  • Gear Marking Compound
  • Loctite
Installation Info
Will it fit my Mustang?
  • GT - 10, 11, 12, 13, 14
  • GT500 - 10, 11, 12, 13, 14
  • V6 - 11, 12, 13, 14
  • Boss 302 - 12, 13

Does not fit 2013 Boss or 2013-2014 Shelby GT500 Mustangs with axle codes S-215-D and S-219-D.

Most Helpful Reviews

5/5
Good bundle

Just had these installed so im still breaking them in. As far as the kit itself the only thing it needs is another thing of oil because the two aren't enough. Other than that I'm in sixth gear at 38mph ...

Read More
Helpful (3)

5/5
Quality product

Still breaking them in... Nice improvement over the stock 3.31's...

Helpful (2)

Read All 30 Reviews
Overall Rating 4.7 out of 5 stars

Customer Photos (5) View All Photos

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4 Questions / 5 Answers

Ask a Question

Do I have to change my slip differential if I install this?? I want to buy this great combo kit to save money but I was wondering if I get this kit do I need to buy a better slip diff or can I keep the stock mustang v6 2013 slip diff.

JaviGrandlux Year: 2013 Model: V6

  • The stock limited slip diff. Will work just fine, no need to upgrade unless you have over a 100K miles on it or ran it low on lube. Get the gears and bearings installed, then go out and enjoy your stang.

    Best Answer

    95PonyGT Year: 1995 Model: GT

    Good Answer (2)

Show 1 more answer Question Resolved

Traction-LOK Rebuild Kit Necessary? Do I need this to change the gears from stock 2.73 to 3.73 on a 2013 base model V6? What is the purpose of the rebuild kit?

TheDrew Year: 2013 Model: V6

  • Not necessary to do the swap unless you feel that there is a problem with the current traction-LOK or there are a ton of miles on the car. Being a 2013, I doubt that either of these two situations are relevant

    HATE2W8GT Year: 2000 Model: GT

    Good Answer (0)

Show 1 more answer Question Resolved

13 Mustang GT Rear Gear Pinion Bearing Does this kit come with the 8.8 Rear Gear Pinion Bearing? I have a 13 GT and notice on the gears without the kit it says to upgrade the Rear Gear Pinion Bearing. Does this kit come with the upgraded Rear Gear Pinion Bearing for my 13 GT?

MustangGTandHayabusa Year: 2013 Model: GT

  • Buy the install kit grab your wrenches and get started

    spe700 Year: 2014 Model: GT

    Good Answer (0)

Question Resolved

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Customer Reviews (30) Write a Review

Overall Rating 4.7

out of 5 stars

Installation Time:Weekend

Installation Cost:$250-$500

  • Performance Gain 4.8 4.8
  • Fit 4.533333 4.5
  • Bang For Your Buck 4.633333 4.6



  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    May 12, 2014

    Good bundle

    Just had these installed so im still breaking them in. As far as the kit itself the only thing it needs is another thing of oil because the two aren't enough. Other than that I'm in sixth gear at 38mph now haha. Must resist urge to floor it. Cost me about $450 to install in california.

    dbowman

    Year: 2011 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 3 California, USA

    Helpful (3) (0)

  • 5/5

    January 28, 2014

    Quality product

    Still breaking them in... Nice improvement over the stock 3.31's...

    Tdbigt

    Year: 2013 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Denver, CO, USA

    Helpful (2) (0)

  • 5/5

    Installation Time: Afternoon

    August 05, 2015

    Automatic that drives like I would a manual

    Made the decision for this install after speaking with my mechanic and AM Customer Support person. While the purchase price was the best on the market for the full kit, the install was significant. I decided to add SR Performance Lower Control Arms since wheel hop is one of the anticipated results of this mod. Total install cost me $600 by transmission shop but, Ford wanted to charge between $850 and $900 just for the gear install so, I guess I can't complain. Anyway, after adding a new BAMA performance tune I am amazed at the results. Ran 120 mile roundtrip errand today and have to say THIS IS THE BEST MOD YET!! First, with the tune, my automatic transmission works like a dream. No lag. No running in 5th gear at 25 MPH. In fact, at highway cruising speed (70 MPH) it remains in 5th gear providing excellent acceleration without having to drive in manual mode. Not sure if this tune will allow it to get to 6th gear, unless driven manually since I didn't go over 70 due to my preference of allowing a comfortable break in. If I had a stick, I'd drive the way it does now. 1st to second gear shift doesn't happen until 1900 to 2000 RPM (as opposed to 1300 to 1400), Shifting is purposeful, obvious and sounds like a manual. At one point I went to manual mode to get to run in 6th. Will only need to do that going forward when my girlfriend is riding with me - LOL. This is a great mod!! Thank you American Muscle for your advice, great product and helping me make the best of my 380HP V6... On it's way to 400HP!! (P.S. A Tune or recalibration tool is a must!!! Without it, your speedo will read 55 when you're doing 40)

    Top 500 Contributor

    Nicksmoak

    Year: 2013 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 2 Hawthorne, NJ

    Helpful (1) (0)

  • 5/5

    Installation Time: Full Day

    April 18, 2014

    the best mod to my mustang yet

    I have a bama tuner, cold air intake and flow master mufflers on 2012 mustang v6 but the car was sluggish off the line or at normal hwy driving after gear install the car has pull at low speed and continues to pull. The car feels like a MUSTANG now.

    doegermbj

    Year: 2012 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 4 san antonio texas

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    July 08, 2014

    must have

    I have upgraded my stang with exhaust lowering springs and everything you can do to a v6 engine with no supercharger but hands down the 3.73 gears are out of this world!!!!!!!! My stang is pushing 405 horsepower because of the upgrades I did but the gears really woke her up. If you dont have these get them it is such an improvement. Be sure to get a tune it really helps change the shift points it your stang is a automatic. Gas milage did go down some prob lost about a mile per gallon but who cares!!! American muscle is the bomb when it comes to aftermarket parts stop reading this and order the gears you will not be disappointed!!!!!!!!

    Top 500 Contributor

    dollartree

    Year: 2011 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 2 murphy nc

    Helpful (0) (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    May 27, 2014

    3.73 are a bit extreme but awesome!

    3.73 are a bit extreme but awesome! I rarely use first gear now unless I am wanting to race someone, otherwise it is really short for stop and go driving. They totally changed the laid back feel of the car to a much more energetic and bold experience. I love them! Rpm is 6th at 70 is around 2400 rpm so fuel economy did drop on the freeway about 2mpg. Install was also pretty expensive with all the shimming involved. Don't forget the install kit!

    MrMiller14

    Year: 2014 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 1 Roseburg, OR, USA

    Helpful (0) (1)

  • 4/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    May 23, 2014

    Makes a difference

    Got mine installed at a shop for about 400. Price was a little more than I hoped for but it was definitely worth it. You can feel the car pull much harder now and my wide 10 inch tires even chirp when in wot. Gas mileage in the city stood about the same but highway went down about 4 mpg. I would not go any steeper than these gears even though I'm sure for city driving 410 would great.

    joeblo

    Year: 2012 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 1 tri cities, washington

    Helpful (0) (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    April 10, 2014

    BUY THEM NOW!

    These gears completely changed my 3.7 in the best way possible. I started with 2.73 gears, the cai, tb, and the tunes made things better as far as acceleration and power. Then I went ahead and took the dive for 3.73's, holy h*ll hahahaha awesome. You step on it and you and you fly forward while you're being pushed back! Acceleration and response is dramatically improved, I own an auto so the response is NOW instead of "hold on a second.. now go." As far as mpg.. maybe 2-3 miles loss.. with 2.73 it was 350 a full tank, now its like 340 a full tank (with cai tune included). Get these gears you won't regret it especially if you have an auto, they make daily driving fun.

    Xgeua

    Year: 2012 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 1 Katy, TX, USA

    Helpful (0) (1)

  • 5/5

    Installation Time: Full Day

    March 21, 2014

    Totally different

    I bought the 3.73 gears for my 2014 Mustang v6. I have a manual 6spd and I weighed the options between this and the 4.10. It was inexpensive for the parts. The labor at the shop was a little more but well worth the cost. Before the car was sluggish and lagged in first and second. Now it moved pretty good and makes me want to buy more mods. I would recommend this to anyone who wants to improve on the performance of their mustang.

    dib14

    Year: 2014 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 2

    Helpful (0) (1)

  • 4/5

    Installation Time: Full Day

    February 21, 2014

    Install kit was troublesome...

    My installer had great difficulty with the Motive Gear install kit that came with this set. He ended up trashing the kit and using Ford parts, which cost me extra since I basically wasted money on the install kit. Ultimately, the gears don't make a sound. No gear whine whatsoever. Performance wise, they are ok, I suppose. I haven't been able to really get on it yet because they're still in their break in period.

    MatthewL

    Year: 2012 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 4 Hurlburt Field, FL, USA

    Helpful (0) (1)

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