The gear ratios for 05-09 S197's are as follows: V6 (All Years): 3.31's with or without limited slip (manual or automatic) GT (05-06): 3.55's standard on Manual & 3.31's standard on automatics.
Full Answer
What is a rear gear ratio on a Ford Mustang?
This is what turns the rear axle and with it, your Mustang’s rear wheels. The number of times the driveshaft rotates for each rear wheel rotation is your Mustang’s rear gear ratio. This is also sometimes referred to as the final-drive ratio since it’s the last gear that must turn before power hits the pavement.
What is the axle ratio of an automatic Mustang?
The gold standard for automatic Mustangs is an axle ratio of 4.10:1. This extra bit of gear makes up for the lower first gear of the transmission and the slip of the converter. This is for street and strip use.
What kind of transmission does a Mustang GT have?
Cutaway of T3650 transmission as fitted in the Mustang GT. The differential gears, also referred to as a ring and pinion, is an additional gearset located in the rear axle of the Mustang. The differential works in tandem with the transmission to supply power to the rear wheels of the car.
What gear ratio for a forced induction Mustang?
Anyway, just for reference, most forced induction street Mustangs run between a 3.08:1 and a 3.27:1 axle gear. There is enough power out of the hole and across the band that leaving the line nor high speed running is a problem.
What gear ratio is in a 2006 Mustang GT?
3.31 gearsThe vehicle speed sensor will operate with the mindset that the car still has 3.31 gears in the rear instead of the 4.10s. The engine may also rev so much more quickly that it will hit the rev limiter before the computer commands it to upshift.
What gear ratio does Mustang GT have?
The majority of Mustangs come with a ratio of 2.73-3.31 from the factory.
What is the stock gear ratio on a 2005 Mustang GT?
Mustang Rear End Gear Ratios1979-931994-982005-092.73 (87-93 V8 Manual)2.733.31 (V6/Auto GT)3.08 (82-85 V8 Auto)3.08 (Manual)3.55 (Manual GT)3.27 (86-93 V8 Auto)3.27 (Auto)3.45 (SVO w/7.5" Rear)
What Mustangs have 8.8 rear end?
All 1979-1985 Mustangs featured the 7.5 rear end. Starting in 1986 Ford introduced the popular 8.8” rear end in the Mustang. From 1986-2010 the Ford Mustang 8.8 rear end went into all V8 Mustangs (5.0L, 4.6L and 5.4L) and the Ford 7.5” rear end went into all 4 cylinder (2.3L) and V6 Mustangs (3.8L).
What's the difference between 3.15 and 3.55 gears?
The 3.55 will make the gears seem shorter meaning you will shift more often. The trade off is faster acceleration for less gas mileage with the 3.55's and vise versa with the 3.15's.
How do I identify a Ford 8.8 rear end?
0:191:36How to Identify Ford Differential Housing Tags - YouTubeYouTubeStart of suggested clipEnd of suggested clipIt's an 8 point 8 inch differential. Sometimes they'll have a limited-slip. And they'll throw an LMoreIt's an 8 point 8 inch differential. Sometimes they'll have a limited-slip. And they'll throw an L in between the first two numbers. So you'll see a three L seven three eight eight.
What gears does a 2005 Mustang GT have?
Many Mustangs came from Ford with either 3.31 or 3.55 gears (a few did come with 3.73s) that were thrown in to skew fuel economy slightly higher in the MPG ranges than give you outstanding performance.
What is the difference between 3.55 and 3.73 gears?
PERFORMANCE: The larger the axle ratio number, the quicker the truck will accelerate. For example, a truck equipped with 3.55:1 axle gearing will accelerate faster than one equipped with a 3.31 axle ratio. Similarly, a pickup with a 3.73 axle ratio will be faster than one with 3.55s.
How do you tell the difference between a Ford 8.8 and 9?
0:053:07How to tell the difference between a Ford 9 inch and an 8 ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd the 9 inch is almost perfectly round the pumpkin in that it also has an extra ribbed in theMoreAnd the 9 inch is almost perfectly round the pumpkin in that it also has an extra ribbed in the structure there and the 8 inch does not have that aside from being a little bit beefier.
Are Ford 8.8 rear ends strong?
This rearend is lighter than a 9-inch and is as strong as a 12-bolt (except for the axles), and many Mustangs came from the factory with Traction-Lok limited-slip differentials.
What rear end is in a 2005 Mustang GT?
The 2005-2010 V8 Mustangs with 8.8” rear ends used 31 spline rear axles.
Is Ford 8.8 limited slip?
Ford 8.8" 10 Bolt, 28 spline, 1979-Current. Limited-Slip-to-Locked, Select-able Locking Differential. Limited-Slip-to-Locked, Select-able Locking Differential.
What gear ratio does a 2017 Mustang GT have?
GT manual gets 3.31 standard, GT auto 3.15 standard. 3.55 is an option for both manual and auto without the PP option.
What gear ratio does the 2018 Mustang GT have?
Testing (and computing) to determine a definitive drag-race winner2018 Ford Mustang GT (6M)2018 Ford Mustang GT (10A)REDLINE7,400 rpm7,400 rpmWEIGHT TO POWER8.4 lb/hp8.4 lb/hpTRANSMISSION6-speed manual10-speed automaticAXLE/FINAL-DRIVE RATIO3.73:1/2.32:13.55:1/2.26:156 more rows•Jun 22, 2018
What is the difference between 3.55 and 3.73 gears?
PERFORMANCE: The larger the axle ratio number, the quicker the truck will accelerate. For example, a truck equipped with 3.55:1 axle gearing will accelerate faster than one equipped with a 3.31 axle ratio. Similarly, a pickup with a 3.73 axle ratio will be faster than one with 3.55s.
What kind of differential does a Mustang have?
The majority of Mustangs come equipped with a limited-slip type differential called Traction-Lok from Ford. A limited slip differential maintains traction by “sensing” when one wheel is slipping, locking the wheels together and thereby redirecting greater torque to the non-slipping wheel.
When was the Mustang manual transmission made?
Mustang Manual Transmission Guide. Ever since the Mustang was born on April 17, 1964, the manual transmission has become a signature staple of performance within every Mustang. Throughout the years, manual transmissions have come a long way from their original roots. In 1965, Ford started with the beloved four-speed, ...
How much horsepower does a 2005 Ford GT have?
For 40 years, it had vanished from the public eye since the original in 1967. Launched with a variation of the infamous 2005-2006 Ford GT 5.4L 32V V8, it produced 500 horsepower and 480 lb/ft of torque. It was no wonder that Ford had to step up their game to back up that much power.
What engine does the 2015 Shelby GT350 have?
When the Shelby GT350 emerged back into the world back in 2015, it was an instant hit amongst Mustang and Shelby enthusiasts. For the first time, Ford featured an engine equipped with a flat-plane crank V8, capable of hitting 8,250 RPM in a 5.2L displacement. The "VooDoo" engine comes standard equipped with 526 horsepower and 429 lb/ft of torque.
What is the longest running manual transmission?
Tremec T-5. The T-5 is the longest-running manual transmission in the history of the Mustang. As the Fox Body Mustang evolved, so did the T-5 manual transmission. First introduced halfway through 1983, it was a significant step forward in transmission engineering and design.
How much lb/ft does a GT500 shift?
With the ability to handle 664 lb/ft and shift in less than 80 milliseconds, needless to say, it has taken the GT500 to new heights of performance never seen before. Unlike a standard manual transmission where you have a clutch, gear handle, clutch pedal, and slave cylinder.
What engine did the 2003 Terminator Cobra have?
For the first time, the 2003-2004 SVT Cobra would receive an Eaton Supercharger on the legendary 4.6L 32V V8. With all this incredible power, it was unfortunate it did not receive the best T-56 engineered to date. Since every Terminator Cobra engine was hand-built, some were higher in horsepower than others.
What year did Ford start the 4 speed transmission?
In 1965, Ford started with the beloved four-speed, which is synonymous with legendary Mustangs like the Shelby GT350/GT350R, GT500, Boss 302, and Boss 429. Since then, each Mustang manual transmission has improved every year due to Ford's innovation, engineering, and technology. Don't know what manual transmission is in your 1979-Present Mustang? ...
What gear ratio is a 2011 Mustang?
Especially with late model Mustangs, it can be difficult to figure out what gears your Mustang has since Ford has offered everything from 3.31s to 3.73s from the factory 2011 and up.
What is the best speed for a Mustang?
Most owners tend to choose a 3.55, 3.73, or 3.90 for a Mustang that is daily driven. If you are serious about speed, then you might consider the 4.10 or a 4.30.
How many miles does it take to replace bearings on a Mustang?
If your Mustang is over or is close to 30,000 miles, your bearings are worn to your old gears. If you have less than 30,000 miles, it is generally accepted you can install gears using just the install kit and your current bearings. Personally, I always recommend getting the full install kit with new bearings and seals. It is cheap insurance to prevent having to replace your bearings and other parts the worn bearings damaged down the road.
What is a ring and pinion gear?
Gears can be a pretty general term but in this case, they refer to the ring and pinion gears residing in the rear differential. Your entire Mustang's rear consists of your axles, the gear housing, a power transfer device (IE a spool, LSD, posi-unit, etc.), and of course the ring and pinion gear set.
What does 4.10 gears mean?
A set of 4.10 gears will also result in a decrease of your top speed which is why they can also be referred to as shorter gears. Replacing a Mustang's stock rear gears with a higher ratio will give you quicker acceleration, greatly improving your 60 foot times--depending on what ratio you choose.
Why do people upgrade to higher gears?
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 as 4.10 gears, can be referred to as a steeper gear.
What is a good compromise for highway gas mileage?
If highway gas mileage is a major concern, a good compromise is a lower ratio such as 3.55 or 3.73. Also note changing your rear gear will affect your speedometer readings, and to correct them you will need a handheld tuner. Transmission. 2.73 Gears.
How to find rear axle ratio on a Mustang?
Another way to determine your rear axle gear ratio is to open the door and look for the Vehicle Certification (VC) tag. Mustang rear end code characters that indicate whether your car has a limited-slip differential or an (open) conventional differential as well as your rear axle gear ratio can be found on the lower right section of the VC tag, labeled “AX”. This tag, also known as the “data plate”, can be found on the driver side door lock face or the B-pillar de pending on the year that you Mustang.
How to find rear end gear ratio?
There are a few ways that you can find your rear end gear ratio. You could count the number of teeth on the ring gear then divide that number by the number of teeth on the pinion gear.
How many splines are in a 2005 Mustang?
The 2005-2010 V6 Mustangs with a Ford 7.5 rear end used 28 spline rear axles, however, the 2005-2010 V8 Mustangs with 8.8” rear ends were upgraded and came standard with the stronger 31 spline rear axles. For 2011-2014 Mustangs, both the V6 and 5.0L V8 Mustang were now equipped with 31 spline axles.
What size rear axle is on a 1979 Mustang?
All 1979 Mustang rear axles through the 1985 fox body Mustangs featured the 7.5” rear, with the exception of the very first year of the Fox that was equipped with a “carry-over” 6.75” rear end from the Mustang II that was only behind the 4-cylinder and 6-cylinder variants.
What is the differential on a Mustang 99-01?
The 99-01 and the 03-04 Mustang SVT Cobras were equipped with an Independent Rear Suspension (IRS) that used the Ford 8.8” differential . Starting in 2011, the V6 (3.7L) was upgraded to feature the same Ford 8.8” rear end found in the V8 (5.0L Coyote) Mustangs.
What year did Ford introduce the 8.8 Mustang?
Starting in 1986, Ford introduced the popular 8.8” rear end in the V8 Mustang to support the 285 lb/ft of torque that the 302 began to produce. The 8.8” rear end is a much stronger option than the weaker 7.5” option which would remain as the 4-cylinder and v6 options for a number of years. Gear ratios went through a number ...
How many bolts are in a 7.5 rear end?
The 7.5” rear end is also flat on top and bottom. However, the visual difference comes in where it is rounded on right and left and, like the 8.8” rear, also has 10 bolts. When measuring from the top left bolt to the bottom left bolt, the 7.5” rear end will measure at 10” from bolt to bolt.
What year did the Mustang GT leave the factory?
This article applies to the Ford Mustang GT (1996-2004). Ford Mustangs leave the factory with a well rounded mix of performance and fuel economy to meet the demands of a daily driven vehicle. The factory gear ratios in the transmission and rear-end are chosen to allow for RPM-friendly highway cruising, while still providing respectable acceleration ...
What is 3.73 gears?
A set of 3.73 gears will provide a noticeable improvement in acceleration, yet maintain reasonable fuel economy on the highway. On the other hand, a weekend only/track car that has little concern for highway manners and fuel economy may see an additional benefit to choosing 4.10 gears.
What is pinion gear?
The pinion gear is meshed with the larger ring gear, which is attached to the differential and turns the rear axles, thu s transferring power to the wheels . The differential gearset ratios installed from the factory are considered by many owners and performance enthusiasts be to a bit conservative.
How does a transmission work?
The transmission functions to transfer power from the engine to the the rear differential and eventually the wheels. The transmission is filled with numerous gearsets that multiply engine torque to a varying degree. Since engines have a limited operating range, a transmission with multiple gears must be used to allow engines to function within their optimum powerband. A transmission must allow the engine to have enough torque to accelerate in lower gears, while also providing adequate speed in higher gears and all while limiting fuel consumption. In a nutshell, a transmission operates by converting the engine power entering through the input shaft to a different speed depending on the selected gear. This altered power then exits the transmission through the output shaft and to the driveshaft/differential. Each gear has a ratio that alters the engine power to a varying degree. Lower gears can multiply engine speed by as much as 3.5:1 to allow for greater torque to accelerate the car. High gears and overdrive gears are closer to a 1:1 ratio, with the latter spinning at a speed slower than the engine RPM to allow for higher cruising speeds and more MPGs.
How much does a 6 speed tranny cost?
A 6-speed tranny can run anywhere from $2,000 to $4,000 depending if a complete kit is used or if components are pieced together. Tack on a good four to six hours of labor if you plan to have a shop do the heavy lifting. Figure 4. Improved acceleration and burnout power.
Does the Mustang have stock gearing?
Fortunately, the Mustang lends itself well to gear ratio changes and, even with a stock engine configuration, can see impressive improvements in acceleration.