Can anyone verify if the gear ratio information below is correct? Some of the final gear ratios vary a lot by different sources.
MTX-IV (SHO)
1st: 3.21
2nd: 2.09
3rd: 1.38
4th: 1.02
5th: 0.74
Rev: 3.79
Fin: 3.74
AXOD / AXOD-E / AX4S / AX4N
1st: 2.771
2nd: 1.543
3rd: 1.000
4th: 0.694
Rev: 2.263
AXOD Fin: 3.37
AX4S Fin: 4.10 3.67 3.55 (varies by source)
AX4N Fin: 3.96 3.99 (varies by source)
V8 fin: 3.77
3-spd ATX
1st: 2.84
2nd: 1.54
3rd: 1.00
Rev: 1.97
Fin: 3.23
5-spd MTX-III (anyone happen to know reverse gear?)
1st: 3.60
2nd: 2.12
3rd: 1.39
4th: 1.02
5th: 0.77
Fin: 3.33
Trans Codes:
A = MTX IV
L = AX4S (1995+)
T = AXODE
X = AX4N
Also, does anyone happen to know for sure if the 2.5L I4 uses a chain or belt? IIRC pushrod engines usually come with a chain. And does anyone know if that motor is an interference motor?
Full Version: Gear Ratio And Engine Question
Taurus Car Club of America > Generation 1-4 Taurus & Sable Platform (1986-2007) > Engine and Drivetrain
Didn't Gen III SHOs have a different final drive? Might be the reason for the difference in the AX4N final drives... 
Yeah, that's why he wrote a different final drive for the v8.
| QUOTE |
| AX4N Fin: 3.96 3.99 (varies by source) V8 fin: 3.77 |
I've also heard 3:98 final drive for v6 ax4n.
Do you think that the Vulcan, Duratec, and Essex have different final drive ratios?
The 2.5L uses a timing chain.. can't remember if it's interference or not tho.. sorry.
| QUOTE (mikehawk @ Jul 17 2005, 10:40 AM) | ||
Yeah, that's why he wrote a different final drive for the v8.
I've also heard 3:98 final drive for v6 ax4n. |
The V6 AX4N had the 3.98 final. Paul Nimz put Duratec gears in his SHO tranny. Talk to him about it.
Actually the AX4N Taurus final drives are all the same at 3.77 IIRC. It is the other vehicles the AX4N that have the different final drive. The 3.98 that I have comes out of a '96 Windstar tranny.
So does the po-po have a different drive ratio? I know the V6 SHO ATX has a different final drive ratio than the SLOs. Does anyone know which number that is?
| QUOTE (mikehawk @ Jul 17 2005, 10:40 AM) | ||
Yeah, that's why he wrote a different final drive for the v8.
I've also heard 3:98 final drive for v6 ax4n. |
The final drive on the SHO is 3.77. In '98 Ford put 3.98 and 3.77 in the Taurus. You have to look at your sticker on the door.
which one does what for yuor car?
does the 3.77 give more top end than the 3.98 or is it the other way around?
does the 3.98 give better off the line performance than the 3.77 or is that the other way around??
I just checked both my 98s and they both have the 6R 3.98 gears. So I was just woundering which one does what.
does the 3.77 give more top end than the 3.98 or is it the other way around?
does the 3.98 give better off the line performance than the 3.77 or is that the other way around??
I just checked both my 98s and they both have the 6R 3.98 gears. So I was just woundering which one does what.
Higher the number the greater torque multiplication, ie. higher rpms for same vehicle speed.
so if my 97 has the 3.77, it wont accelerate as well as a 3.98?
I googled the crap out of this subject and everything I found confused me
I googled the crap out of this subject and everything I found confused me
uhhhh this may not be necessarily correct either...........
| QUOTE |
| Qwertz9586 Posted: Jul 16 2005, 10:36 PM Report Post Trans Codes: A = MTX IV L = AX4S (1995+) T = AXODE X = AX4N |
My '93 has an L on the door.
on my AX4N it says 3R, then below it it says UPC. Does this mean anything besides Universal Product Code on a box of cracker jacks?
Thanks
Adam
Thanks
Adam
What if it just says "R"...no number next to it? This is the best pic I have:
that the full race equipped version of the Taurus, you know like the Accord Turbo-R. It neans you have the 4.11:1 
| QUOTE (rudedog @ Aug 7 2006, 01:50 AM) |
| that the full race equipped version of the Taurus, you know like the Accord Turbo-R. It neans you have the 4.11:1 |
OMG, I am so lucky. I am going out right now to beat some Mustangs and Corvettes! They will never know what hit them.
But really, isn't this a little odd?
A typo perhaps?
R= 3.77
Alex, just to add...
In 1991-1995, the 3.8L AX4S had a final drive of 3.19. The Police 3.8L AX4S had a final drive of 3.37
In 1991-1995, the 3.8L AX4S had a final drive of 3.19. The Police 3.8L AX4S had a final drive of 3.37
| QUOTE (SHOZ123 @ Aug 7 2006, 07:49 AM) |
| R= 3.77 |
So I guess that in the build sheet Ford sent me, instead of 3.77 non-locking limited slip rear axle ratio they really ment the final drive being 3.77?
| QUOTE (RoGuE @ Aug 7 2006, 01:23 PM) | ||
So I guess that in the build sheet Ford sent me, instead of 3.77 non-locking limited slip rear axle ratio they really ment the final drive being 3.77? |
Yes. It's the FWD equivalent of the rear differential ratio.
| QUOTE (D Man @ Aug 6 2006, 12:42 PM) |
| which one does what for your car? does the 3.77 give more top end than the 3.98 or is it the other way around? does the 3.98 give better off the line performance than the 3.77 or is that the other way around?? I just checked both my 98s and they both have the 6R 3.98 gears. So I was just woundering which one does what. |
To restate what Paul said in a different way;
The higher the final drive ratio, the better the off-the-line acelleration. The lower the final drive ratio, the higher the top speed.
Frankly, I don't get above 120MPH often, so I will be getting the 3.98 gears in my SHO soon.
Wow, old topic. Anyways, I've already included many corrections on the transaxle pages over the last year, and I'll keep adding new stuff.
http://www.taurusclub.com/encyclopedia/Engine/Trans.html
http://www.taurusclub.com/encyclopedia/Engine/Trans.html
| QUOTE (Davekcon @ Aug 6 2006, 02:40 PM) |
| so if my 97 has the 3.77, it wont accelerate as well as a 3.98? I googled the crap out of this subject and everything I found confused me |
This topic isn't simple; depending on the gears in question, a lower gear may hurt or help performance in a given vehicle.
In the case of our cars, as you raise the "final gear ratio" in the tranny, your zero to 60 and quarter mile times go down and your acceleration goes up. At the same time, your highway gas mileage will tend to go down.
At a certain absurd point the performance equation will go the other way... if your tranny has to shift 3 times before you hit 55, you'll spend more time shifting than accelerating.
Check out the latest vehicle testing at this site:
http://www.nlectc.org/testing/vehicles.html
Note the differences between the Crown Vic Police Interceptor with the 3.27 and 3.55 rear end ratios.
That depends on how well the tranny is set up too. My ATX will shift a lot faster than any manual. Maybe a 1/2 second total for both 1-2 and the 2-3 shifts.
thanks tom. thinking about automatic transmissions makes me queasy 
...but i always knew mine was faster
...but i always knew mine was faster
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.