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Gear Ratio And Engine Question |
 Jul 16 2005, 10:36 PM
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#1
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Taurus stands out like a wildebeest in plaid pajamas.  Group: Moderator Posts: 12,542 Joined: 18-February 03 From: Nevada, USA Member No.: 1,084  Chapter: West Coast Car: Ford Taurus Year: 2003 Engine: 3.0 DOHC (Duratec)  
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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? |
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Jul 17 2005, 07:23 AM
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#2
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Hello. My Name Is TANK. Group: Moderator Posts: 2,800 Joined: 11-July 04 From: Newton, MA Member No.: 4,175 Chapter: Northeast Car: Ford Taurus Year: 1998 Engine: 3.0 DOHC (Duratec)
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Didn't Gen III SHOs have a different final drive? Might be the reason for the difference in the AX4N final drives...
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Jul 17 2005, 10:40 AM
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#3
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 Group: Premium Supporter Posts: 2,861 Joined: 6-February 03 From: FL Member No.: 1,015 Car: Ford Taurus Year: 1997 Engine: 3.0 DOHC (Duratec) |
Yeah, that's why he wrote a different final drive for the v8.
I've also heard 3:98 final drive for v6 ax4n. |
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Jul 17 2005, 09:25 PM
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#4
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Taurus stands out like a wildebeest in plaid pajamas. Group: Moderator Posts: 12,542 Joined: 18-February 03 From: Nevada, USA Member No.: 1,084 Chapter: West Coast Car: Ford Taurus Year: 2003 Engine: 3.0 DOHC (Duratec)
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Do you think that the Vulcan, Duratec, and Essex have different final drive ratios?
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Jul 17 2005, 10:17 PM
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#5
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Senior Ford Technician Group: Members Posts: 3,638 Joined: 12-July 04 From: Brantford, Ontario, Canada Member No.: 4,184 Car: Ford Taurus Year: 1999 Engine: 3.0 DOHC (Duratec) |
The 2.5L uses a timing chain.. can't remember if it's interference or not tho.. sorry.
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Jul 18 2005, 12:58 AM
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#6
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Even Spidey likes to read Sports Illustrated...  Group: Gold Supporter Posts: 8,328 Joined: 31-October 03 From: Kankakee, IL Member No.: 2,617 Chapter: Midwest Car: Ford Taurus Year: 1997 Engine: 3.4 Yamaha V8
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The V6 AX4N had the 3.98 final. Paul Nimz put Duratec gears in his SHO tranny. Talk to him about it. |
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Jul 18 2005, 04:32 PM
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#7
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SCT tuner Group: Technical Advisor Posts: 13,895 Joined: 3-November 02 From: Ashkum, Illinois Member No.: 204 Car: Ford Taurus Year: 1997 Engine: 3.4 Yamaha V8 |
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.
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Jul 18 2005, 07:27 PM
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#8
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Taurus stands out like a wildebeest in plaid pajamas. Group: Moderator Posts: 12,542 Joined: 18-February 03 From: Nevada, USA Member No.: 1,084 Chapter: West Coast Car: Ford Taurus Year: 2003 Engine: 3.0 DOHC (Duratec)
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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?
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Aug 6 2006, 07:45 AM
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#9
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SCT tuner Group: Technical Advisor Posts: 13,895 Joined: 3-November 02 From: Ashkum, Illinois Member No.: 204 Car: Ford Taurus Year: 1997 Engine: 3.4 Yamaha V8 |
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.
Attached File(s)
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Aug 6 2006, 12:42 PM
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#10
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Group: Members Posts: 1,664 Joined: 23-November 02 From: Oneida, NY Member No.: 419 Car: Ford Taurus Year: 1998 Engine: 3.0 DOHC (Duratec) |
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. |
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Aug 6 2006, 02:19 PM
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#11
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SCT tuner Group: Technical Advisor Posts: 13,895 Joined: 3-November 02 From: Ashkum, Illinois Member No.: 204 Car: Ford Taurus Year: 1997 Engine: 3.4 Yamaha V8 |
Higher the number the greater torque multiplication, ie. higher rpms for same vehicle speed.
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Aug 6 2006, 02:40 PM
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#12
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Group: Members Posts: 373 Joined: 16-July 05 Member No.: 6,501 Car: Ford Taurus Year: 1996 Engine: 3.0 OHV (Vulcan) |
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 
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Aug 6 2006, 02:41 PM
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#13
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2010 TaurusSpringNationals Austin,Tx April 9-12 2010 Group: Gold Supporter Posts: 5,868 Joined: 3-November 02 From: Houston, Texas Member No.: 184 Chapter: Southern Car: Ford Taurus Year: 1993 Engine: 3.0 OHV (Vulcan)
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uhhhh this may not be necessarily correct either...........
My '93 has an L on the door. |
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Aug 6 2006, 11:43 PM
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#14
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 Group: Select Supporter Posts: 690 Joined: 6-October 03 From: Milwaukee Area Member No.: 2,477 Car: Ford Taurus Year: 1997 Engine: 3.0 OHV (Vulcan) |
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 |
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Aug 7 2006, 12:11 AM
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#15
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RIP 1996 Ford Taurus Group: Members Posts: 2,041 Joined: 8-September 05 From: Atlanta, Georgia Member No.: 6,802 Chapter: Southeast Car: Ford Taurus Year: 1996 Engine: 3.0 OHV (Vulcan)
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What if it just says "R"...no number next to it? This is the best pic I have:
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Aug 7 2006, 12:50 AM
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#16
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2010 TaurusSpringNationals Austin,Tx April 9-12 2010 Group: Gold Supporter Posts: 5,868 Joined: 3-November 02 From: Houston, Texas Member No.: 184 Chapter: Southern Car: Ford Taurus Year: 1993 Engine: 3.0 OHV (Vulcan)
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that the full race equipped version of the Taurus, you know like the Accord Turbo-R. It neans you have the 4.11:1
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Aug 7 2006, 02:24 AM
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#17
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RIP 1996 Ford Taurus Group: Members Posts: 2,041 Joined: 8-September 05 From: Atlanta, Georgia Member No.: 6,802 Chapter: Southeast Car: Ford Taurus Year: 1996 Engine: 3.0 OHV (Vulcan)
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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? This post has been edited by RoGuE: Aug 7 2006, 02:25 AM |
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Aug 7 2006, 06:49 AM
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#18
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SCT tuner Group: Technical Advisor Posts: 13,895 Joined: 3-November 02 From: Ashkum, Illinois Member No.: 204 Car: Ford Taurus Year: 1997 Engine: 3.4 Yamaha V8 |
R= 3.77
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Aug 7 2006, 07:52 AM
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#19
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S.H.OH NO!! Group: Moderator Posts: 4,654 Joined: 31-October 02 From: Queens, NYC Member No.: 46 Chapter: Northeast Car: Ford Taurus Year: 1992 Engine: 3.2 Yamaha
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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 |
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Aug 7 2006, 01:23 PM
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#20
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RIP 1996 Ford Taurus Group: Members Posts: 2,041 Joined: 8-September 05 From: Atlanta, Georgia Member No.: 6,802 Chapter: Southeast Car: Ford Taurus Year: 1996 Engine: 3.0 OHV (Vulcan)
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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?
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Aug 7 2006, 01:30 PM
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#21
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Even Spidey likes to read Sports Illustrated... Group: Gold Supporter Posts: 8,328 Joined: 31-October 03 From: Kankakee, IL Member No.: 2,617 Chapter: Midwest Car: Ford Taurus Year: 1997 Engine: 3.4 Yamaha V8
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Yes. It's the FWD equivalent of the rear differential ratio. |
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Aug 7 2006, 01:32 PM
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#22
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Even Spidey likes to read Sports Illustrated... Group: Gold Supporter Posts: 8,328 Joined: 31-October 03 From: Kankakee, IL Member No.: 2,617 Chapter: Midwest Car: Ford Taurus Year: 1997 Engine: 3.4 Yamaha V8
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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. |
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Aug 9 2006, 01:23 AM
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#23
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Taurus stands out like a wildebeest in plaid pajamas. Group: Moderator Posts: 12,542 Joined: 18-February 03 From: Nevada, USA Member No.: 1,084 Chapter: West Coast Car: Ford Taurus Year: 2003 Engine: 3.0 DOHC (Duratec)
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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 |
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Aug 9 2006, 09:49 AM
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#24
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Group: Members Posts: 88 Joined: 17-January 05 Member No.: 5,510 Car: Mercury Sable Year: 2002 Engine: 3.0 DOHC (Duratec) |
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. This post has been edited by TomJones76: Aug 9 2006, 09:52 AM |
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Aug 9 2006, 10:16 AM
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#25
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SCT tuner Group: Technical Advisor Posts: 13,895 Joined: 3-November 02 From: Ashkum, Illinois Member No.: 204 Car: Ford Taurus Year: 1997 Engine: 3.4 Yamaha V8 |
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.
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