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Ford Performance 3.73 Gears and BAMA X4 Tuner (99-04 V8)

Market Price $699.99 You Save 11% ($80.00)
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  • Item 101657

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    Features & Details

    • Money Saving Combo Kit
    • Bama SF4/X4 Tuner with 3 Custom Tunes
    • Free Tunes for Life
    • Ford Racing 3.73 Gears - 8.8"
    • Motive Gears 8.8" Rear End Installation and Bearing Kit
    • 2 Quarts Royal Purple Max Gear 75w90 Gear Oil
    • 1 Quart of Ford Racing Friction Modifier
    • Includes datalog reviews to ensure your vehicle is fully optimized
    • Fits 1999-2004 V8 Mustangs
    Bama Performance

    The Gears
    The Gears

    Improve ET's and Low End Torque. Installing a set of steeper rear gears is a great way to get more low end grunt off the line and lower your ET's at the same time. Ford Racing Mustang ring and pinion gears feature a super strong forged construction, CNC cut & lapped gear teeth, and a black oxide finish to resist corrosion making them perfect for street, road, or race use. More info about these gears - Here

    The Tuner
    The Tuner

    Power. Performance. Personalized. The SCT Power Flash Tuner features Bama Performance custom tunes that are written specifically for your Mustang. Our tunes are based on a 19 point questionnaire to deliver the most power and performance possible for your Mustang’s modifications. All Bama Performance tunes are tested and proven on our very own in-house Dynojet 224xLC Chassis Dyno. More info about this tuner - Here

    The Combo
    The Combo
    • More horsepower and torque
    • Better throttle response
    • Enhances existing modifications
    • Custom Dyno proven tunes
    • Free Tunes for Life


    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.

    **NOTE: Programming custom tunes may take 2-3 business days plus applicable shipping time. We recommend ordering other products separately to avoid delay. Some heavily modified cars are not tunable with a mail order tune. Click for details. Membership in the Tunes for Life program is is valid for as long as you own the car that was originally tuned and is non-transferrable.

    Fitment: 1999 2000 2001 2002 2003 2004 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • (1) SF4/X4 Power Flash Tuner
    • (1) One USB PC Interface Cable
    • Ford Racing 3.73 Gears
    • Motive Gears 8.8" Rear End Installation and Bearing Kit
    • (2) quarts Royal Purple Max Gear 75w90 Gear Oil
    • 1 quart of Ford Racing Friction Modifier
    • Free Tunes For Life
    Installation Info
    Tech Specs
    Bama Custom Tuning at AmericanMuscle. Power. Performance. Personalized. Proven
    Ordering a Custom Tune?Whether it's a new mod or just an octane change on your existing tunes, our Bama Performance calibrators have got you covered in a few easy steps:
    1. Buy this Tuner & Submit your Mustang's Info
    2. A Bama Performance Calibrator writes custom tunes just for your Mustang & Mods
    3. Load 'em on your Mustang and GO!
    4. As you add new mods, Bama will update your tune files for FREE!
    That's right, Free Tunes for Life!

    More Power. Do you want the ultimate power package for your Mustang? Well look no further, because it has arrived. AmericanMuscle introduces the kit that will launch you into quarter mile times that you have never dreamed of possible; designed to give the best possible performance upgrade for your car, without having to empty your wallet.

    Kit includes: (click on each item for full product description)

    Increased HP and torque. From the factory, the manufacturer programs their vehicles to cater to the needs of the daily driver, not the performance enthusiast. After loading the custom Bama Tune on a vehicle, even a bone stock, unmodified Mustang will realize noticeable gains in HP, Torque, and Fuel Economy.

    Increase your mod's potential. Factory computer settings are calibrated for the original factory components. When making performance modifications, you need to recalibrate the vehicle's computer to realize the full potential that these modifications can achieve.

    Free tunes for life! Every customer that purchases a tuner is enrolled in the "Free tunes for life" program. Any time that you make additional mods to your vehicle, our team of SCT certified Bama Custom Tuners will create new tunes for you.

    Custom Bama Tunes specific to your vehicle. When you order a tuner, you aren't just getting a tuner - you are getting the tuner and 3 dyno-tested custom Bama tunes:

    • Street (87-93 octane) - the street tune is designed as a daily driver program that focuses in on increasing mid-range power. It does give up a few HP at higher RPMs, but that's why there is a Performance file. Automatic vehicles are further enhanced by making adjustments to the transmission's shift points and firmness.
    • Performance (87-93 octane) - The Performance program is designed to add power at 3000 RPMs and higher, focusing more on the top end horsepower and all out performance driving. Timing, fuel and throttle response settings are slightly more aggressive than the street tune. This is a great track tune but also works well for daily drivers that are looking for a little more "get up and go" than the street tune. The automatic transmission settings are the same as in the street tune.
    • Race (91 - 93 octane) - The race tune will ensure the largest increase in vehicle performance. Using the highest grade of fuel available in your area is mandatory. This file is designed for "Race only Use" as the timing, fuel, and throttle response settings are very aggressive. in fact, the adjustments are so aggressive, that we do not recommend it for daily driving as it may cause your vehicle to try to jump out from a stop and easily spin the tires. Finally, with the automatics, we implement entirely new shift points and firmness settings to further enhance the all-out performance of the vehicle.

    Nitrous (91-unleaded race gas) - Our nitrous option can be added to any of our previously mentioned tune options, but only for 91-octane unleaded fuel.

    Easy to load; easy to restore. Not only are the custom tunes easy to load on your vehicle, it is just as easy to restore your factory settings. When you load your custom tune on the vehicle, the tuner automatically stores your vehicle's factory settings. To return the vehicle to its factory settings, just plug the tuner back in, select the option to restore the factory settings, and you're done.

    SCT SF4/X4 Power Flash Tuner Features:

    • The SF4/X4 by SCT is the newest replacement for the popular SF3/X3
    • Reads / Clears DTC Trouble Codes
    • On screen data logging and monitoring
    • Full color LCD display with auto dim feature
    • Built-in WiFi for easy updates
    • PC/Windows compatible
    • Custom tuning applications for 1999-2004 GT, Bullitt, Mach 1 and SVT Cobra Mustangs
    • Click for Instructions on Loading Custom Tunes to your Mustang.

    Approximate RPM for 1999-2004 GT


    Manual
    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 3888 5443 6998      
    2 2301 3221 4141 5061 5981 6902
    3 1518 2126 2733 3340 3948 4555
    4 1150 1610 2070 2531 2991 3451
    5 782 1095 1480 1721 2034 2347


    Automatic
    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 3267 4573 5880      
    2 1783 2496 3209 3922 4636 5349
    3 1150 1610 2070 2531 2991 3451
    4 805 1127 1449 1771 2093 2416
    Will it fit my Mustang?

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    Customer Photos

    Questions & Answers (108)

    5 Top Rated Questions

    I have read the contents of this kit, I have watched the video, but I STILL DON'T KNOW if this kit includes the rear gear pinion bearing kit necessary for 2010 Mustang gear swaps? And this is from a person who reads, writes and interprets complex written language for a living... Also, can not find this "drop-down" menu you are talking about in the video. You warn about it being necessary all the time, yet do not state clearly if this bearing kit contains it or not. Please indicate this CLEARLY for everyone to see, it is really confusing. Apart from that (assuming the kit DOES NOT include the rear, which I seem to deduct from one of the answers for previous questions), why make a bearing kit without the most important and needed bearing? Does ANY kit you sell include this 2010 rear gear pinion bearing (maybe those big kits with bottles for 279$ or any other kits by Ford?) or the only way is to buy the bearing separately?

    • We do apologize that the listing is not clear enough. The Motive Rear End Installation and Bearing Kit does not include the Rear Gear Pinion Bearing for 2010-2014 Mustangs. The bearing is not included in the kit because the kit is designed for 1986-2014 Mustangs, and it is not necessary for the majority of the years this kit works on. It is included in the Gear Combo Kits for the 2010-2014 GT and 2011-2014 V6 Mustangs found here: https://www.americanmuscle.com/2010-mustang-gears.html#shop-by7

    Helpful (5)

    Will this correct speedo for a rear gear change

    • Yes this Bama tuner would be able to calibrate your vehicle for the gear change that you made to it.

    Helpful (2)

    Whats the difference? What is the difference between this kit and the kit for 35 dollars?

    • This kit comes complete with everything you need for a full rebuild: bearings, shims, crush sleeve, etc... The $35 kit is a basic kit that is the same as the more expensive version, but there are no bearings included. We highly recommend getting the complete kit and replacing all your bearings and shims at the same time to prevent any costly problems down the road. It's better to replace them all at once, rather than having to tear the car apart again just for a bearing gone bad.

    Helpful (2) Show 2 more answers

    I have a bolt on 99 GT ( intake, intake plenum, intake manifold, pulleys, offroad H, 4.10 gears ) would this be able to extract more whp then my current old revision predator u7146 with canned tunes?

    • The Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes will be able to get you some more horsepower than the preloaded tunes yes!

    Helpful (1)

    Will Bama be able to tune for an Eaton TVS 1900 Supercharger on my 2002 Mustang GT?

    • Unfortunately, Bama does not tune for aftermarket superchargers.

    Helpful (1)
    Post Your Question
    10 More Questions
    Do you know if these kits will fit a 99 f150 4x4 with an 8.8 rear gear? 1 answer
    What type of bearing come in this kit? Koyo or Timken? 1 answer
    can the Bama SF4/X4 be used to turn off theft system I have a 2003 mustang GT, I've had several occasions when car would not start due to theft system. I would like to bypass/turn off the theft system 1 answer
    Can i data log AFR and Boost on my X4? 1 answer
    Will this work after a engine swap? I own a 2000 Mustang GT 5 speed and was considering purchasing this tuner to wake it up some more. I am in the process of putting a new 4.6 SOHC motor in the car. If I buy this tuner and use it with the 4.6 already in the car will it work when I put the new engine in? The engine is just a rebuilt version of what's already in there. 3 answers
    Is the 93 OCT tune a tune that you have to use different fuel with? what is that? 0 answer
    Will the tunes down load on a old window vista home version 0 answer
    What’s the difference between a custom tuner, versus a preloaded tuner? Both same price of $399. 0 answer
    Hey what is the difference between the 2 tunes performance and race? Hp and tq gains wise 0 answer
    Would I be able to tune to 92 octane? 0 answer

    People Who Bought This Item Also Bought

    Customer Reviews (100+) Write a Review

    Overall Rating 4.8

    out of 5 stars

    Installation Time:Weekend

    Installation Cost:$250-$500

    • Performance Gain 4.618117 4.6
    • Seat Of Your Pants Feel 4.448632 4.4
    • Ease Of Use 4.697241 4.7
    • Bang For Your Buck 4.396424 4.4
    • Preferred Tune: Performance
    • Fit 4.875 4.9



    • 5/5

      September 15, 2018

      Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

      Bama t4 tuner

      You can definitely tell a big difference with the tunes from stock

      BradleyK

      Year: 2004 Submodel: GT

      Helpful (0)

    • 1/5

      September 12, 2018

      Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

      Sct Tuner

      Its complete... I've wasted my money twice to have no tunes work... one on my 93, and now this.

      JonT

      Year: 2003 Submodel: GT

      Helpful (0)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $500-$1000

      September 11, 2018

      Review from Ford Performance Ring Gear and Pinion Kit - 3.73 Gears (11-14 V6; 86-14 V8, Excluding 13-14 GT500)

      Better acceleration response

      Had it professionally installed with a one piece aluminum drive shaft. It still has a whirring sound at high speed. Response acceleration is greatly improved. If we can get the whirring noise fixed I will give it 5 stars.

      JeffW

      Year: 2007 Submodel: GT

      Helpful (0)

    • 5/5

      September 07, 2018

      Review from Motive Rear End Installation and Bearing Kit - 8.8 in. (11-14 V6; 86-14 V8, Excluding 13-14 GT500)

      2008 P71

      Being on a low budget after three open heart surgeries, this good priced and high quality product was perfect for the 4.10 posi install.

      JamesM

      Year: 2004 Submodel: GT

      Helpful (0)

    • 4/5

      September 06, 2018

      Review from Motive Rear End Installation and Bearing Kit - 8.8 in. (11-14 V6; 86-14 V8, Excluding 13-14 GT500)

      3.73's

      Good less the cheesy housing gasket . The 3.73 gears turned out great !

      mark

      Year: 2014 Submodel: V6

      Helpful (0)

    • 4/5

      September 02, 2018

      Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (03-04 Cobra)

      Instructions are not easy to find

      Once downloaded made a nice difference in throttle response. Nice options of monitoring cars important gauges. Car still needs to go to a Dyno shop to be totally dialed in.

      BrettD

      Year: 2004 Submodel: Cobra

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      September 01, 2018

      Review from Ford Performance Ring Gear and Pinion Kit - 3.73 Gears (11-14 V6; 86-14 V8, Excluding 13-14 GT500)

      3.73 Gears

      Great quality, they run quiet, and really woke up the Mustang.

      VaRocker

      Year: 2001 Submodel: Bullitt

      Helpful (0)

    • 5/5

      August 08, 2018

      Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

      Bama X4/SF4

      Great product had a little problem down loading but Bama Tech talked me though it. Will get my car Dyno tested on Aug 17. But car runs great.

      Ranger1

      Year: 2004 Submodel: GT

      Helpful (1)

    • 5/5

      August 06, 2018

      Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

      Unleash the beast

      The tune seems to have taken a few rides to be noticed, but boy is it noticeable!

      JohnK

      Year: 2000 Submodel: GT

      Helpful (2)

    • 5/5

      July 23, 2018

      Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

      Im a believer

      Never really believed im chip tuning or handheld tuners butttt i was proven wrong. I have a 99 gt with very light mods and raced my friend with a 2017 v6. Before the tuner i lost by about half a car length. After the tuner i was in front by a full 2. The power is there, easy install, 100 would suggest.

      Krowdkilla

      Year: 1999 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      July 22, 2018

      Review from Ford Performance Ring Gear and Pinion Kit - 3.73 Gears (11-14 V6; 86-14 V8, Excluding 13-14 GT500)

      Seat of the pants.

      Great seat of the pants feel! Wakes up the performance of the car! I would definitely recommend swapping out gears.

      Sally

      Year: 2005 Submodel: GT

      Helpful (1)

    • 3/5

      July 20, 2018

      Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

      Good tuner

      Works great and everything but it doesn’t offer a description, only the DTC number, on most of the codes my car has had and it could use some more helpful data monitor categories, such as AF ratio.

      TB

      Year: 2004 Submodel: GT

      Helpful (3)

    • 5/5

      July 17, 2018

      Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

      Wake up

      I like the bama tuner it worth the money. The tuner has awakened my car and now runs like it should. Im very happy with the tuner. would rec to anyone

      Chris

      Year: 2004 Submodel: GT

      Helpful (2)

    • 5/5

      July 13, 2018

      Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

      The best thing to happen to my car

      I love my Bama X4. It woke my stang up from a sleep that it had from the time that I brought it. Thanks

      ClaudeP

      Year: 2003 Submodel: GT

      Helpful (2)

    • 5/5

      July 08, 2018

      Review from Motive Rear End Installation and Bearing Kit - 8.8 in. (11-14 V6; 86-14 V8, Excluding 13-14 GT500)

      Good kit

      A need for a regear. Has everything you need but the oils

      AlexR

      Year: 2005 Submodel: GT

      Helpful (1)

    • 4/5

      July 05, 2018

      Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

      Here it is

      Had to restart a few times to download program once it got past a point it loaded ok

      PhilG

      Year: 2003 Submodel: GT

      Helpful (2)

    • 5/5

      July 03, 2018

      Review from Motive Rear End Installation and Bearing Kit - 8.8 in. (11-14 V6; 86-14 V8, Excluding 13-14 GT500)

      Good!

      Good parts will continue to order from American muscle! Shipping is usually fast but could be faster!

      PaigeC

      Year: 2003 Submodel: GT

      Helpful (2)

    • 1/5

      July 01, 2018

      Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

      Bama tuner

      sounded like there was detonation problems when I downloaded my custom tunes. Car lacked power. Made awful noise.

      RonanK

      Year: 2003 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      June 29, 2018

      Review from Ford Performance Ring Gear and Pinion Kit - 3.73 Gears (11-14 V6; 86-14 V8, Excluding 13-14 GT500)

      Ford 3.73 gears

      Theses gears are great . They gave me the extra boost I needed. Cost 450$ to install and it is worth every penny. Great for acceleration and torque.

      RonaldA

      Year: 2006 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Full Day

      June 25, 2018

      Review from Ford Performance Ring Gear and Pinion Kit - 3.73 Gears (11-14 V6; 86-14 V8, Excluding 13-14 GT500)

      373 gear set

      Complete set comes with every thing you need too rebuild your 8.8 rear end. Installed prefect. Good gear set for manual trans. Rpms are still good. Your Speedo will b off a little. And you may want to get another bottle of royal purple to top off the oil. I would recommend!

      JeremyP

      Year: 2009 Submodel: GT

      Helpful (2)

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