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Old 10-01-2011, 08:42 PM   #1
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Gears

Do I need to get the speed recalibrator or a tooth or do I need both 94 Mustang gt 4.10 gears or will my sct chip tuner take care of the speed
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Old 10-01-2011, 08:47 PM   #2
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Re: Gears

you should be able to adjust it with your SCT.
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Old 10-01-2011, 08:55 PM   #3
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You need to change the speedo gears, the chip will not recalibrate it because it's mechanical.
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Old 10-02-2011, 11:43 AM   #4
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Re: Gears

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Originally Posted by Jesse Bach View Post
Do I need to get the speed recalibrator or a tooth or do I need both 94 Mustang gt 4.10 gears or will my sct chip tuner take care of the speed
where n ohio r u? also, i think u will need to swap the speed sensor in back of the tranny as well.
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Old 10-02-2011, 05:00 PM   #5
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A mechanic and I called ford and they said the chip tuner will fix the speed
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Old 10-02-2011, 05:05 PM   #6
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Quote:
Originally Posted by Jesse Bach
Do I need to get the speed recalibrator or a tooth or do I need both 94 Mustang gt 4.10 gears or will my sct chip tuner take care of the speed
94 is not computer calibrated. You will need a new gear.
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Old 10-02-2011, 06:07 PM   #7
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Re: Gears

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A mechanic and I called ford and they said the chip tuner will fix the speed
do u have a tuner? cause if u dont, the speed sensor/speedo gear is like 10times cheaper.

also, your car is obd1 system. your pretty limited on tuner stuff without buying an aftermarket pcm.

sounds to me like u dont wanna get under the car. u rather spend $250 buks than 5-10dollars at the junk yard swapping a part that has one bolt holding it on.
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Old 10-02-2011, 06:55 PM   #8
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Quote:
Originally Posted by Jesse Bach
A mechanic and I called ford and they said the chip tuner will fix the speed
Misinformation from them is going to cause you to spend money on something that won't work. The speedo is mechanical and requires both the tailshaft and speedo gears to be changed for 4.10 gears. There is no way around it if you want your speedometer to read correctly.
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Old 10-02-2011, 07:41 PM   #9
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And as I say that I checked,thought 94-95 were still mechanical. Sorry. If you already have a chip have it tuned, if you don't have one and want to save money you can get a speedo recalibrator.

---------- Post added at 07:41 PM ---------- Previous post was at 07:40 PM ----------

http://www.americanmuscle.com/ford-s...tool-9410.html
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Old 10-03-2011, 10:45 AM   #10
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Re: Gears

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Originally Posted by 93slowstang View Post
Misinformation from them is going to cause you to spend money on something that won't work. The speedo is mechanical and requires both the tailshaft and speedo gears to be changed for 4.10 gears. There is no way around it if you want your speedometer to read correctly.
the tail shaft...really? ive never known that to be necessary. there are like 4 plastic speedo gears if im not mistaken.. and ford color codes them. each one works within a gear ratio spectrum. like 2.73-3.08, then 3.27-3.55, 3.73-4.10.

theres a lil "u" clip that holds the gear to the sensor, so u can swap just the platic gear.

the tail shaft splines are the same tooth count and diameter on most ford rear wheel drive. ive never seen a tail shaft swapped to correct a speedo.

someone chime in on this...
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Old 10-03-2011, 11:03 AM   #11
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Quote:
Originally Posted by svtlx

the tail shaft...really? ive never known that to be necessary. there are like 4 plastic speedo gears if im not mistaken.. and ford color codes them. each one works within a gear ratio spectrum. like 2.73-3.08, then 3.27-3.55, 3.73-4.10.

theres a lil "u" clip that holds the gear to the sensor, so u can swap just the platic gear.

the tail shaft splines are the same tooth count and diameter on most ford rear wheel drive. ive never seen a tail shaft swapped to correct a speedo.

someone chime in on this...
90 and up stock uses a different gear in the tailshaft housing.
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Old 10-03-2011, 11:06 AM   #12
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Re: Gears

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Originally Posted by 93slowstang View Post
90 and up stock uses a different gear in the tailshaft housing.
true, but changing the plastic gear and the tailshaft are two different things..was my point
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Old 10-03-2011, 11:12 AM   #13
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In order for his speedo to read right for 4.10 gears he would have to change both gears. It wouldn't be just the little speedo gear. He has an 8 tooth tailshaft gear and needs a 7 tooth with a 23 tooth speedo gear. Cheaper still, but a lot more work.
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Old 10-03-2011, 11:32 AM   #14
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Re: Gears

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Originally Posted by 93slowstang View Post
In order for his speedo to read right for 4.10 gears he would have to change both gears. It wouldn't be just the little speedo gear. He has an 8 tooth tailshaft gear and needs a 7 tooth with a 23 tooth speedo gear. Cheaper still, but a lot more work.
wut? its like four bolts holdn the tail shaft on and one 8 or 10mm holdn the sensor on. besides for the tranny fluid bath, it goes pretty quickly..lmao
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Old 10-03-2011, 11:44 AM   #15
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I would just do the electronic calibration. No need for a tranny fluid bath. Lol
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Old 10-03-2011, 11:52 AM   #16
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Re: Gears

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I would just do the electronic calibration. No need for a tranny fluid bath. Lol
thats of course if u already have the tuner. my best friend builds trannys, aod,aode, 4r70w and others.. i get stuck helpn him bench alot, so i guesse im just used to tranny fluid baths..lol
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Old 10-03-2011, 12:00 PM   #17
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Quote:
Originally Posted by svtlx

thats of course if u already have the tuner. my best friend builds trannys, aod,aode, 4r70w and others.. i get stuck helpn him bench alot, so i guesse im just used to tranny fluid baths..lol
Yes having a tuner already would make it the best option. I wasn't to crazy about changing the tailshaft gear on my last tranny. Thankfully my new one came with the gear I needed.
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Old 10-03-2011, 12:22 PM   #18
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Re: Gears

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Yes having a tuner already would make it the best option. I wasn't to crazy about changing the tailshaft gear on my last tranny. Thankfully my new one came with the gear I needed.
well ive done several, and all i swaped out was the plastic gear/speed sensor and theyve always read accurate. ive never swaped a tail housing so this is news to me. ill ask my friend thats a trans builder, but he's the one that taught me.

i was always told to just match the plastic gear to the rear end ratio, and its always worked.
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