What Is the Gear Ratio for a 2005 Automatic V6 Mustang UPDATED

What Is the Gear Ratio for a 2005 Automatic V6 Mustang

What Exactly Are Mustang Gears?

Gears can exist a pretty general term merely in this example, they refer to the band and pinion gears residing in the rear differential. Your entire Mustang'south rear consists of your axles, the gear housing, a ability transfer device (IE a spool, LSD, posi-unit, etc.), and of course the ring and pinion gear gear up. Without getting too much into the technical details of how gears piece of work, they convert the power coming from your driveshaft to power needed to turn your wheels.

Gears are referred to by ratios, such as 3.31 gears. This means the driveshaft needs to plow 3.31 times in order to plow your tires once. People upgrade to numerically higher gears because increasing this number gives your engine more leverage and makes it easier to accelerate faster. Higher gears, such every bit 4.10 gears, can be referred to as a steeper gear. A prepare of 4.10 gears will also result in a subtract of your top speed which is why they can likewise be referred to as shorter gears.

• Replacing a Mustang's stock rear gears with a higher ratio will give y'all quicker acceleration, greatly improving your 60 pes times--depending on what ratio you lot choose
• A ratio of three.55 will go you down the drag strip quicker than most stock ratios, but iii.73s or iv.10s are an even greater improvement and and so on
• Going with too extreme a gear ratio can result in lost traction and reduced superlative speeds, depending on your overall setup
• For a street machine that might as well run across the rail, three.55s, three.73s and 4.10s gears are recommended, with 4.10s being the gear of pick for automated transmissions
• 3.73 vs 4.10 gears: 4.10s volition let you experience quicker revs & lower gas mileage, but greater passing power on the highway (recommended shift signal - iii,000 rpms)

Every bit nosotros've established the numerically higher the gear ratio is, the easier it is to go the vehicle moving and better accelerating, but later lowers pinnacle speed. Why does it lower top speed? Keep in mind our V8 engines have a finite RPM limit. Consider this simplified example, where nosotros do not take the manual into consideration (for the sake of the case, the engine is continued direct to the differential). If the engine has a rev limit of 6000 RPM and the beam ratio is 3.08, and so at 6000 RPM the wheels will be turning 1948 RPM (6000/three.08). Say the automobile had a numerically higher axle ratio of 3.55, then our final wheel speed would be 1690 RPM, which is less than the peak speed of the 3.08 axle ratio.

Why Would You Want to Change Your Mustang's Gear Ratio?

There are many reasons, but the near common on a tardily model Mustang is to get your car into the power band faster, or similar mentioned above, to accelerate faster. The crusade for such sluggishness, at least for the belatedly model Mustangs is when Ford switched from the five.0L pushrod motor to the 4.6L modular motor. A common complaint was that the new motor was slower off the line. This is because the 4.6L does not beginning making its torque until to a higher place in the RPMs unlike the five.0L. Changing to a steeper gear volition get that pig out of its blanket, and really wake information technology up off the line.

Past changing the ratio, you lot are non actually irresolute whatever power levels, but you are manipulating the available torque. This is why it's considered the best bang for your buck mod. No actual power changes, merely in that location can be a huge departure in functioning and race times afterward swapping gears. If you are plenty happy with the manner your Mustang drives, there is admittedly no demand to change the rear gears.

What Gear Ratio Should I Purchase?

Most owners tend to choose a iii.55, 3.73, or iii.90 for a Mustang that is daily driven. If you are serious about speed, then yous might consider the 4.ten or a iv.thirty. Yet, the higher the ratio the faster y'all will advance, but it will as well result in much higher engine RPMs when cruising on the highway (this handy gear ratio to RPM chart will show you what your Mustang's estimated RPMs will exist at prowl). Y'all'll also exist sacrificing your tiptop end speed and some fuel economy. If highway gas mileage is a major concern, a good compromise is a lower ratio such as 3.55 or 3.73. Also notation changing your rear gear will affect your speedometer readings, and to right them you will need a handheld tuner.

Transmission	2.73 Gears	3.08 Gears	3.55 Gears	3.73 Gears	4.ten Gears	iv.56 Gears
AOD / AODE Automobile Trans	1400 RPMs	1650 RPMs	1800 RPMs	200 RPMs	2300 RPMs	2550 RPMs
4R70W Auto	1500 RPMs	1850 RPMs	2000 RPMs	2250 RPMs	2350 RPMs	2600 RPMs
T5/T4 Transmission
TR3650 Manual	1450 RPMs		1900 RPMs
TR6 Manual	1200 RPMs	1500 RPMs	1600 RPMs	1800 RPMs	2150 RPMs	2400 RPMs
MT-82 Machine & Transmission	1560 RPMs	1750 RPMs	2000 RPMs	2150 RPMs	2350 RPMs	2600 RPMs

For 'Stangs equipped with an automatic transmission, it is recommended to go with either iii.73s or four.10s. This is considering the torque converter and dissimilar gear ratios inside the transmission itself. Automated transmissions exhibit more skid and power loss due to their greater complexity, therefore a shorter gear is necessary to overcome these furnishings. Automatic cars tend to exist heavier than their manual brethren, and thus suffer somewhat from that as well.

For heavily modified naturally aspirated engines, forced induction, and big-shot nitrous cars, what gear ratios to purchase is actually a trick question. In that location are many factors that come into play, and it is best to talk to the shops that did the work on your engine, manual, and chassis to find out what ratio to use.

Gearing for Performace: Autocross and Road Racing

Choosing gears for autocross/road racing can be like, however different from i another. 1 major item to consider is the form itself (one will primarily be racing on). The general idea is to remain in gear for the majority of the runway; shifting as little as possible. Shifting consistently slows downwards times past non putting the ability to the wheels. Somethings to consider for proper gear selection tin can be items as average course speed, altitude, the degree of turns, etc.

three.73'south tend to be a pop pick, but it really comes downwards to a variety of factors. Your all-time bet is talking to people with like Mustang'due south to yours to become an thought what works best.

Some additional options to squeeze every picayune advantage out of a new gear install are to have the outer ring lightened. This process removes about 1 lb to two lbs of rotating weight. Other options include cryogenic handling for some additional force, and/or micro bluish coatings that help in lubrication.

How Does Tire Size Effect Final Drive Ratios?

On a Mustang or any vehicle, tires work like gears do. This ways that changing the tire height will impact how the terminal drive performs. Generally speaking, taller tires will get in human activity like a higher gear ratio and will fifty-fifty impact the vehicle's top speed capabilities. It tin quickly go a balancing act every bit you want the motorcar to launch harder, just a taller tire nevertheless offers more contact with the basis. If yous take too much contact, the tires tin possibly hook up plenty to destroy axles.

Taller tires are also heavier and the gears will have to piece of work harder to turn them. Ultimately, you want to consider how powerful the motorcar is and what you need out of it. If it can have the beating and more than top end is needed taller tires are a must, but for street/strip applications, you shouldn't accomplish for the tallest tire you could fit in the wheelhouse.

What Gear Ratios Does My Mustang Have Stock?

Over the years, Mustangs accept been offered with a myriad of gear ratios, and so figuring out which ones are in your car can exist tough. Specially with belatedly model Mustangs, it can be difficult to effigy out what gears your Mustang has since Ford has offered everything from iii.31s to 3.73s from the mill 2011 and upward. Typically, the stock ratio is on the build sheet, or could be on a sticker on the door panel or glove compartment. Y'all tin as well find the gear ratio stamped into the differential cover or written on to it from the manufactory, but these aren't ever visible and tin be difficult to locate. Using a VIN decoder tin help and as a last resort you can go to a dealer and have them cheque to tell you.

If you suspect the gears already may have been changed, you can MacGyver information technology past jacking upwardly the rear end, spin the tire one fourth dimension and count how many revolutions the driveshaft made (it's a good idea to utilize white-out or a sharpie to make a reference point on the driveshaft). Or, remove the differential encompass and count the teeth. Only be certain y'all know what you lot are starting with. If yous're starting with 3.55s and experience they are non plenty, information technology'southward difficult to say going with 3.73s will rock your world, every bit it is only an incremental step. Below is a breakup of Mustang gear ratios by year:

1979-1993 (Foxbody) Mustang Stock Gear Ratios	1994-1998 (SN95) Mustang Stock Gear Ratios	1999-2004 (New Edge) Mustang Stock Gear Ratios	2005-2009 (S197) Mustang Stock Gear Ratios	2010-2014 (S197) Mustang Stock Gear Ratios*	2015-2017 (S550) Mustang Stock Gear Ratios	2018 (S550 Mustang Stock Gear Ratios
2.26 (78-82 4.2L V8 automatics)	ii.73	3.27 (V6, GT, and '99-'01 Cobras)	3.31 (All V6s, automatic GTs, and GT500s)	2.73	three.15 (V6)	3.15 (Automatic EcoBoost)
2.47 (79 v.0L V8 automatics)	3.08 (manual trans)*	three.55 (Mach 1 and '03-'04 Cobras)	three.55 (GT manuals)	3.xv	3.31 (V8 and EcoBoost)	iii.31 (Transmission EcoBoost)
ii.73 (87-93 V8 manuals)	3.27 (automatic trans)*			3.31 (GT500s too)	3.55 (Performance Packet)*	three.55 (Automatic GT)
3.08 (82-85 V8s)*				three.55	three.73 (Torsen Perfromance Package)	three.73 (Manual GT, GT350, and GT350R)
3.27 (87-93 V8 automatics)*				three.73 (2013 Track Pack and Boss models)
3.45 (4cyl Turbos w/ vii.5" rear)*

*1979-1993: The 3.08 rear gears as well came in the 1993 Cobra. The 3.27 rear gears also came in the not-turbo, 4 cylinder engines with a vii.5" rear diff. The 3.45 rear gears DID NOT come up in the 1985-1986 SVO. The transmission turbo coupes came with 3.55 rear gears, but the automatic turbo coupes came with 3.73 rear gears.

*1994-1998: Cobras accept 3.08 rear gears, but the Cobra R Mustangs came with 3.27 rear gears.

*2010-2014: The axle codes are equally follows - BB is iii.73, CC is 2.73, DD is three.55, GG is iii.31, and YY is 3.xv.

*2015-2016: The 3.55 rear gears are options on the V6 and the V8, but 3.15 and 3.31 are the standard gears respectively.

Speedometer Calibration and Transmission Shift Points

Changing the gears will brand your speedometer read incorrectly. This can be annoying and can go y'all in trouble with the law! Also if yous have an automatic transmission this will cause your shift points to be incorrect and could cause some serious problems that could pb to manual damage. There are several methods to correct these bug though.

17 Molar Speedo Gear

New In Mustang Gears

Do I Need a Tune When Installing New Gears?

Y'all have a couple of options as far as correcting your Mustang's speedometer and odometer reading. Depending on the twelvemonth of your Mustang, the correction can be washed by installing a speed calibrator, reprogramming with a chip or tuner, or installing the adjustment gear bachelor through Ford racing.

A custom tune requires the use of a bit or handheld tuning device such as the SCT Eliminator, X3 PowerFlash, or LiveWire tuner. Your dealer volition create a custom melody that specifically calibrates your speedometer and if you lot have an automatic, it will calibrate your transmission's shift points. This method volition work on all Mustangs with figurer controlled electronic gauges (1999 Mustangs).

SpeedCal Devices

A SpeedCal is an electronic device that allows you to adjust the bespeak being transmitted from your transmission to calibrate for gear changes. This works on Mustangs with both calculator controlled electronic gauges and non-computer controlled electronic gauges (1994-2004 Mustangs).

Foxbody Speedometer Gears

If y'all have a 1979-1998 Mustang, replacing the speedo gear is a low cost choice to correct your speedometer. The install is not as well hard and it'due south important for safety considerations to get your speedo reading correctly. In order to assistance you detect the correct gear for your ride, we have a helpful guide beneath and on all speedo gear product pages:

Beam Ratio	six Tooth Bulldoze Gear	vii Molar Drive Gear	viii Tooth Drive Gear
2.73	-	xvi	xviii
3.08	-	18	20
3.27	xvi	19	21
3.55	17	20	23
iii.73	18	21	-
4.10	20	23	-
iv.30	21	-	-
4.56	23	-	-

Transmission	16T	17T	18T	19T	20T	21T
Manual	Vino	White	Yellow	Pink	Black	Cherry
Automated	Blue	Green	Gray	Tan	Orangish	Purple

Mustang Transmissions and Their Speedometer Gears

Manual Transmissions with 7 Tooth Drive Gears:

• 1983-1989 T-v OEM
• Pre 1993 T-5 Aftermarket
• 1996-1998 Cobra T-45 OEM
• All Tremec Transmissions

Transmission Transmissions with viii Tooth Bulldoze Gears:

• 1990-1998 T-v OEM
• 1996-1998 T-45 OEM Except Cobra

Automatic Transmissions with 7 Tooth Bulldoze Gear:

• 1983-1989 Automatic Transmissions

Automatic Transmissions with 8 Tooth Bulldoze Gear:

• 1990-1998 Automatic Transmissions

Bearings and Install Kits

If your Mustang is over or is close to 30,000 miles, your bearings are worn to your onetime gears. If you have less than 30,000 miles, it is generally accepted y'all can install gears using just the install kit and your current bearings. Personally, I always recommend getting the total install kit with new bearings and seals. Information technology is cheap insurance to forbid having to supplant your bearings and other parts the worn bearings damaged downwards the road.

VIDEO: 8.8in. Rear Cease Bearing Installation Kit Review

How Practice I Install My Mustang'due south Gears?

Irresolute rear gears on whatsoever vehicle is a very circuitous task. While it is straight forward upon starting time glance, the precision and fourth dimension it takes to consummate the task tin can be overwhelming. If one does not utilize the proper equipment (measuring device, torque wrench, beam blazon torque wrench, slide hammer, etc) the job can be almost impossible to do correctly. If installed incorrectly, gears can have improper, premature wear. As a event from improper installation, they can too whine and exist quite noisy. Improper installation is easier to achieve than a correct install of the gears; a simple micrometer off the right backlash can cause improper wear.

4.10 Gears Installed

Do I Need to Change My Mustang'south Gear Oil?

After putting in the new gears, you'll want to put fresh gear oil dorsum in the differential. Make certain to utilize high quality synthetic gear oil to get maximum performance out of your Mustang. If you have a limited slip differential, Regal Purple comes with the friction modifier added, so you lot don't have to get a split bottle.

How Much Gear Oil Does My Diff Hold?

On Mustangs from 1986-2014 (with the exception of the 1999-2004 Cobras) utilize the 8.8 rear terminate. This fluid capacity is roughly 3 quarts (including a bottle of friction modifier). For 2015 and newer models, the fluid capacity is 1.6 quarts and 4 oz of fluid capacity. This does non use to the GT350 as it holds slightly more than fluid. On V6 models until 2011 (in 2011, they received an 8.eight rear stop) the capacity is the same as the viii.viii counterpart.

What Size Rear Stop Does My Mustang Have?

• 1979-1985 V8s: 7.5
• 1986-2010 V6: 7.v
• 2011-2018 & EcoBoost: 8.8
• 1987-2018 Mustang GT and Threescore - 8.8
• 1999-2001 & 2003-2004 IRS Mustangs: 8.viii

From 1979-1985 Mustang'due south came with the vii.v" rear. Up until 2011, the 7.5" was factory for everything without a V8. The 8.8" rear was the differential of choice for the V8 engines (4.6, 5.0, and the 5.4). Later 2011 the 3.7L V6 and the Coyote powered Mustangs shared the 8.8". The Mustangs with IRS (Independent Rear Break) under them also came with the eight.8" rear cease (99-01 and 03-04).

Granted, people change out the stock rear differentials for a number of reasons. Ane style to tell the difference is by the comprehend gasket and the pinion gear splines. The 7.v" rear has two flat edges on the gasket whereas the 8.eight" is mostly circular with two divots. Lastly, the 7.5" pinion has 28 splines, and the viii.eight" has 30 splines.

Go on in mind if you have a 7.5 differential it tin can't adjust 8.8 diff gears. You can, however, get the same ratios as those found in the 8.viii diffs. In other words, your V6 can house the same ratio as a GT.

Differential Cover Gasket for viii.8in Diffs

Does My Mustang Come up with an LSD from the Factory?

Upwards until 2011, all V6 models came with an open differential (in the 7.v) while V8 models came with an LSD (in the eight.8). After 2011, all models came with an LSD with the eight.8.

V6 Mustang Differentials and Interchangeability

Up until 2011, the V6 models had unlike rear ends than their 8 cylinder counterparts. A 2010 older V6 Mustang has a 7.v rear end. As a consequence, they accept their own gears (although the same size at the 8 cylinder 8.8 rear ends). Therefore, you tin apply V6 gears on all V6 Mustangs from 1994-2010. Nonetheless, a 2011-2014 gear from a V6 volition not be compatible with a 2010 and older model. V8 models employ 8.eight rear ends and are interchangeable between all V8 models and V6 models from 2011 to the electric current production twelvemonth.

three.73 Ratio Band and Pinion Installed in a 2010-2014 Differential

Should I Rebuild My Mustang'south Rear Differential?

The whole signal of a differential is to get power to tires with traction. Limited skid differentials make information technology so your Mustang can use both rear tires to push frontwards rather than one, making winter months a fleck easier to bargain with. LSDs are too pop for drifters since both tires spin in a drift which not but looks cooler, but makes it easier to swing out the back end. The easiest mode to tell if your Mustang's LSD needs a rebuild is to do a burnout and have a friend tell you if both tires are smoking or if just i is spinning. If it's only the one, it'south time for a rebuild.

Practice I Want a Traction-Lok Rebuild Kit?

If y'all accept a Mustang with Trac-Lok, accept tried doing a burnout, and noticed only i of your wheels spinning, your Trac-Lok unit may demand a rebuild. Having a worn out Trac-Lok won't damage anything, but y'all could be losing out on some serious grip off the line if information technology's not working as it should.

Limited Slip Differential

Fitment includes: 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, GT, V6, Cobra, ShelbyGT500, Mach1, Bullitt, Boss, LX, SVO, EcoBoost, ShelbyGT350

Peak Sellers

DOWNLOAD HERE

What Is the Gear Ratio for a 2005 Automatic V6 Mustang UPDATED

Posted by: josephtoneve.blogspot.com