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GUYS WITH THE GEARS 3.73/4.10..GOT A ?

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Old 10-09-2006, 11:47 PM
  #11  
mustangman02232
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Default RE: GUYS WITH THE GEARS 3.73/4.10..GOT A ?


ORIGINAL: P Zero

ORIGINAL: mustangman02232


ORIGINAL: KIMMER

Hey guys, for you that have changed your gears, how does the car do on the highway? I know the last time I had 4.10's on a car, the thing twisted some rpms going down the highway and really ruined the enjoyment level of cruising in the car. What kind of rpm's are you getting at 80mph and how much higher is that than the 3.55's?
was it an older car? final drive on these are .62, not 1:1 like muscle cars
My '79 had a .50 4th gear. Spun 1800RPM @ 85 . 3RD gear was 1:1. BTW it was an SROD (single rail overdrive) trans.
-P.
well most of em


ORIGINAL: MikeVistaBlue06

Depends if it is an automatic or a manual:

automatic OD gear is 0.75:1--works best with a 3.73 so you have some OD left on the highway!

manual OD gear is 0.68:1--works best with a 4.10.

I am taching 2000 @ 60mph and about 2500 @ 75mph. I also have the 18" fanblade wheels, automatic transmission, and 3.73 gears.

http://www.allfordmustangs.com/artma...OVERVIEW.shtml
t3650 5th gear is .62 not .68, the t-5 is .68, also, the 4.6 are modular motors, not pushrods, so they rev happy, my rule would be 4.30s in a 5 speed 4.10s in auto

http://www.stangnet.com/Tech-Article...d-Answers.html
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Old 10-11-2006, 07:57 AM
  #12  
Bulitt
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Default RE: GUYS WITH THE GEARS 3.73/4.10..GOT A ?

just get the 4:10 s you will love them , better yet if i did it agian i would get 4:30
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Old 10-11-2006, 10:21 PM
  #13  
2006RedGT
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Default RE: GUYS WITH THE GEARS 3.73/4.10..GOT A ?

At 70MPH i'm just at 2000 with 3.31s. 80 is only 2200 rpm and 100 is only 2800. 3200 or so is about 110.

Oh and Tungest. 100 with 4.10's and 18's is about 3500 rpm.
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Old 10-11-2006, 10:51 PM
  #14  
MikeVistaBlue06
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Default RE: GUYS WITH THE GEARS 3.73/4.10..GOT A ?


t3650 5th gear is .62 not .68, the t-5 is .68, also, the 4.6 are modular motors, not pushrods, so they rev happy, my rule would be 4.30s in a 5 speed 4.10s in auto

http://www.stangnet.com/Tech-Article...d-Answers.html
I beg to differ with you. The manual transmission for the GT has a 0.68 OD the automatic has a 0.75 OD for both the V6 and the GT. I know for a fact the automatic is 0.75 because I have calculated my final RPM from 4th gear reads and it is exactly 0.75 times the rpm in 4th gear.

BTW, [sm=WTFsgign.gif] is this article you posted where the dude says most come with 3.27 gears; they come with 3.31s now or for 2005 and 2006 they had either 3.31s with automatics and 3.55s with manual. This data may be true for older models, but it isn't right for 2005-2007 models!!

4.10 is TOO MUCH FRIGGIN GEAR for an automatic! Unless all you plan to do is 1/4 runs all the time!

A 3.73 gear is perfect for the automatic transmission. I know because I have one and just got over 25mpg driving 80 mph and taching about 2625 @ 80mph!! A 4.10 or 4.30 would take away any OD left on the automatic transmission.

As you say, if you don't know, don't give advice!

Mike
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Old 10-12-2006, 11:10 AM
  #15  
saud alzaabi
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Default RE: GUYS WITH THE GEARS 3.73/4.10..GOT A ?

daaamn thats too much ... if im going 2600 rpm stock at a certain speed its going to be 3000 rpm with 4.10 i do a weekly highway 2 hour drive
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Old 10-13-2006, 12:10 AM
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Default RE: GUYS WITH THE GEARS 3.73/4.10..GOT A ?

4.30s is the way to go. Runs good on the highway.
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Old 10-13-2006, 12:42 AM
  #17  
JGT
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Default RE: GUYS WITH THE GEARS 3.73/4.10..GOT A ?


Is it true that some dealerships will install gears and not void your warranty?

I am walking a very fine line as it is, with CAI/tuner/midpipe, but I am absolutely DYING to put these gears in and don't know if I can wait another 30,000 miles. I am starting to think I should do it and hope I have no issues.

Are they even going to be able to tell you did this unless your gears mess something up and they are actually digging around in there?
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Old 10-13-2006, 12:01 PM
  #18  
MikeVistaBlue06
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Default RE: GUYS WITH THE GEARS 3.73/4.10..GOT A ?


ORIGINAL: saud alzaabi

people with manual 4.10's can you please see on what rpm ur going when ur doing 100 mph ? cuz usually i go 100 mph on highways
A manual with 4.10s will be basically identical to an automatic with 3.73's. The automatic being slightly lower geared. Therefore, Since I tach 2500 @ 75mph, your RPM @ 100mph in 5th gear with 4.10s should be close to (100/75)*2500 = 3333rpm.

Mike
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Old 10-15-2006, 11:10 AM
  #19  
Nixtang
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Default RE: GUYS WITH THE GEARS 3.73/4.10..GOT A ?

[/quote]


4.10 is TOO MUCH FRIGGIN GEAR for an automatic! Unless all you plan to do is 1/4 runs all the time!


[/quote]

It's all a matter of opinion - what you can and can't live with. have the 4.10's in my auto, and in my opinion, there's no other way to go! I drive over 60 miles round trip each day. With these gears, I'm turning about 2500 rpm's at 70 mph. In town, the performance is great!! At full throttle, I'm barking the tires in both second and third!! Of course, the Brenspeed tune probably has a lot to do with that...

Nick
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Old 10-15-2006, 08:00 PM
  #20  
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Default RE: GUYS WITH THE GEARS 3.73/4.10..GOT A ?

Some Ford dealers will install gears if you get the parts from them. What gears are you thinking about getting?
I have a 5 speed with 4.30 gear and I love it! 80 mph around 3000 rpm.
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