Differential Ratio -1995 GT ? - Mustang Evolution

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Old 03-26-2015, 02:29 PM   #1
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Differential Ratio -1995 GT ?

What is the stock differential ratio on a 1995 Mustang GT?

What would be a good upgrade for it for all around improvement in performance?

Thanks!
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Old 03-26-2015, 03:25 PM   #2
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It could be 2.73 or 3.08 or even 3.27.


Those were the factory gears offered by Ford.
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Old 03-26-2015, 08:32 PM   #3
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Check your vehicle safety certification label stuck on the body of the car where the driver side door shuts.Look on the bottom of that label all the way towards the right hand side and you'll see the letters "AX".There will be a single letter or number under it.Match it to a Ford axle identification code chart to get your answer.If it hasn't been removed by the previous owner(if you're not the original owner)there will be a metal tag attached to the differential cover by one of the cover bolts.That tag has the axle type stamped/embossed into it.If you don't drive the car long distances everyday,a 3.73 is usually best in a stick and a 4.10 is best in a auto.If you do drive it a lot for long trips,a 3.55 is better with a stick car and a 3.73 for an auto.You'll feel a big difference in acceleration by swapping gears.It will feel like you've added 50hp.Replace the bearings and clutch packs while you're in there to save you from pulling it apart again down the road.Royal Purple or similar brand gear oil is a good idea too.Actually if you've got a stick,it really helps with shifting characteristics during winter time when parts get cold.So swap some good synthetic fluid into the tranny down the road.
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Old 03-27-2015, 07:44 AM   #4
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3.73s are fine on the highway, if you aren't going to be going over 70mph for extended periods then get 4.10s. If you are going to commute on the highway a lot then 3.55s or lower. All depends what your goals are and what you use the car for.


And as was said, check your door sticker or put the car in the air and spin the tires/count the axle rotations to figure out what gears you have.
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Old 03-27-2015, 01:21 PM   #5
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The trick Scotty mentioned is another way to find out what ratio you've got.Just jack the rear of the car off the ground,use chalk and put a line/mark on the tire and the driveshaft,put the transmission in neutral then slowly turn the wheel one complete revolution (exactly) Count the number of turns the driveshaft makes.Using a assistant for this procedure makes it easier.The number of turns made by the driveshaft (during one complete rotation of the rear wheel)is an approximation of the rear axle ratio.If the driveshaft turned just a little bit more than 4 times,you have a 4.11 ratio.If it turned
3 3/4 times,that would be a 3.73 ratio.
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