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Old 02-21-2013, 09:03 PM   #1
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gears

Gears??I'm new to this so I hope this is not a stupid question.how do I know what gears are in my stang without tearing them out??any help would be appreciated.
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Old 02-21-2013, 09:05 PM   #2
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Stock gears are 3.27. You can also check by putting it on stands and counting the number shaft rotations per wheel rotations. YouTube will have some good videos to walk you through how to do it.
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Old 02-21-2013, 09:09 PM   #3
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You can also check the diff cover for the tag.. The tag if there will have the gearing, if the tag is gone then at the very least someone has been inside..
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Old 02-21-2013, 09:12 PM   #4
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Awesome,thanks for the info.I'm going to do that and see what I come up with.this was my first post on here.I'm looking forward to some upgrades real soon..as soon as I figure out what I want to add first.

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Where would it be on the diff??
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Old 02-21-2013, 09:15 PM   #5
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This is what she looks like now,

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Old 02-22-2013, 05:21 AM   #6
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Beautiful car, should be proud. What RPM's are you running at 60mph?
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Old 02-22-2013, 08:44 AM   #7
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not all 99-04 are 3.27 it depend on auto/manual etc. You can look on the door jam or the rear end.

If all else fails jack up the rear mark a spot on the driveshaft then rotate the rear wheels one full turn and count the drive shaft revolutions, its the ratio.
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Old 02-22-2013, 09:58 AM   #8
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Old 02-22-2013, 10:12 AM   #9
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What's the stock gears for auto
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Old 02-22-2013, 11:08 AM   #10
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I'm not sure what the Roma are running at 60 but ill go see and let u know
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Old 02-22-2013, 11:23 AM   #11
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Rpm
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Old 02-25-2013, 07:15 PM   #12
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Sorry the weather's been bad.had to put her up.as soon as this snow is gone I'm getting her out to check the rpms.also about to order a cold air intake and throttle body tonight.
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Old 02-26-2013, 06:14 PM   #13
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My 97 auto had 3.27's. Just changed them out friday to the 4.10's.
Was running around 2k stock at 60mph now its about 2350-2400 at 60.
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Old 02-26-2013, 06:51 PM   #14
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My 97 auto had 3.27's. Just changed them out friday to the 4.10's.
Was running around 2k stock at 60mph now its about 2350-2400 at 60.
I have the same car and planning on the 4.10. Us there a significant change in performance that you feel?
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Old 02-26-2013, 07:02 PM   #15
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I have the same car and planning on the 4.10. Us there a significant change in performance that you feel?
I had 4.10s and they were amazing. They made a huge difference. My car was more torquier and got to speed quicker. Killed my gas mileage though.
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Old 02-26-2013, 07:12 PM   #16
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Definitely a difference! Order the gear for the speedo at the same time since you or whoever does it will already have it lifted.
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Old 02-27-2013, 03:22 AM   #17
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Already have the 4.10s. Need to figure out what speedo I need.
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Old 02-27-2013, 06:53 AM   #18
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I'm running 2K RPM's at 60 mph so, I would guess then, that I have stock 3.27 gears? I was told it's stock '96 Cobra. Sounds correct?
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Old 02-27-2013, 09:39 AM   #19
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This is the gear you'll need
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Old 02-27-2013, 09:41 AM   #20
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My bad

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Old 02-27-2013, 11:33 AM   #21
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I'm running 2K RPM's at 60 mph so, I would guess then, that I have stock 3.27 gears? I was told it's stock '96 Cobra. Sounds correct?
That sounds a bit high for 60; I run 2,000 at 60 with 4.10s. I'd love a reference rpm at 70 because that's probably the most familiar speed/rpm combo for me to guess from due to highway driving.
3.73s should be around 2,300-2,400 at 70, and my 4.10s pull 2,600-2,700 at 70
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Old 02-28-2013, 04:31 PM   #22
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Funny, I was just think about this thread. I took my first long highway excursion yesterday where the average speed was 70-75mph and I was paying attention to the rpms. I noticed that it was at about 2K RPM's to 2400RPM's at 60-75mph. Once at 60mph, it didn't raise too much at all.
-I'll ask the prior owner next time I see him. I am also installing Amsoil/Ford Friction Modifier to the differential this weekend. We'll see how that does at lowering the RPM's. The differential fluid is an oversight among alot of people, when it is a key part in reducing drag, friction, sheer, in the entire function of the car's movement. Very important that the fluid is clear and not turning blue/gray.
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Old 03-01-2013, 01:58 AM   #23
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My bad
Ok the orange 20 tooth gear is currently installed. The black one your showing is what I need for the 4.10? I need to do this right because my car's speedometer is checked for calibration every two years. Real pain in the ***.
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Old 03-01-2013, 11:36 AM   #24
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Yes. That's the 4.10 gear from steeda. Its 23 tooth.
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Old 03-01-2013, 01:54 PM   #25
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It also depends on your vin u can look it uo that way as well from FORD my mustang

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It also depends on your vin u can look it uo that way as well from FORD my mustang
Sorry my phone messed up / my mustang came with 308 is what i meant to end with
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Old 03-01-2013, 04:45 PM   #26
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I'm running about 2500 to 2600 rpm at 60 in 4 th gear?? And idea what I have??
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Old 03-02-2013, 06:12 PM   #27
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I'm running about 2500 to 2600 rpm at 60 in 4 th gear?? And idea what I have??
Why are you in fourth at low highway speeds is what I'd like to know.
Anyways, sounds like you'll drop down to around 1,800 when you go to 5th, so you have 3.27.
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Old 03-04-2013, 10:24 AM   #28
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Idk that's where my rpms were at when I was on the highway.if I woulda dropped it down into third at 60 my rpms would of been high.so I figured that was a good reference point for someone to have an idea of what gears I had.I'm wanting to order 410s
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Old 03-04-2013, 11:59 AM   #29
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Idk that's where my rpms were at when I was on the highway.if I woulda dropped it down into third at 60 my rpms would of been high.so I figured that was a good reference point for someone to have an idea of what gears I had.I'm wanting to order 410s
Dear lord. You do know that you have another gear don't you? I didn't even think about going to 3rd. I really suggest going ahead and running in overdrive (5th) at 60+. It saves so much fuel and it's so much quieter.

Anyways! 4.10s are awesome! I love mine and honestly kinda wish I had gotten 4.30s. I drive a Procharged Mach with 3.73 and it really didn't jump off the line on hard launches like my little 2v does; plus that centri squeal pissed me off. I'm definitely considering 4.30 or 4.56 when I get a 4v; it's what those motors want to run.
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Old 03-04-2013, 12:07 PM   #30
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Yup 3.27s
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Old 03-04-2013, 12:53 PM   #31
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Dear lord. You do know that you have another gear don't you? I didn't even think about going to 3rd. I really suggest going ahead and running in overdrive (5th) at 60+. It saves so much fuel and it's so much quieter.

Anyways! 4.10s are awesome! I love mine and honestly kinda wish I had gotten 4.30s. I drive a Procharged Mach with 3.73 and it really didn't jump off the line on hard launches like my little 2v does; plus that centri squeal pissed me off. I'm definitely considering 4.30 or 4.56 when I get a 4v; it's what those motors want to run.
Yes,i wouldn't mind going with 4.30 or 4.56.how big of a difference from the 4.10 gears??and what about gas??is it going to totally kill my mpg.its still my daily driver.
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Old 03-04-2013, 02:22 PM   #32
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Yes,i wouldn't mind going with 4.30 or 4.56.how big of a difference from the 4.10 gears??and what about gas??is it going to totally kill my mpg.its still my daily driver.
If its your dd then i wouldnt go more than 4.10 but at most 4.30.. it shouldnt kill your mpg that much just depends on how you drive. and what speeds and rpms youre at
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Old 03-04-2013, 05:37 PM   #33
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If its your dd then i wouldnt go more than 4.10 but at most 4.30.. it shouldnt kill your mpg that much just depends on how you drive. and what speeds and rpms youre at
This.
4.10s kinda suck for traveling. I go back and forth to college 400mi each way and I average 23-24 highway.
It's really not a HUGE drop, I only averaged 28-30 with 3.27s, but it's noticeable.
4.30s would get you probably 20 highway.
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Old 03-04-2013, 06:49 PM   #34
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This.
4.10s kinda suck for traveling. I go back and forth to college 400mi each way and I average 23-24 highway.
It's really not a HUGE drop, I only averaged 28-30 with 3.27s, but it's noticeable.
4.30s would get you probably 20 highway.
You got a v8?
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Old 03-04-2013, 07:01 PM   #35
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I didn't know the mpg were that good...?
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