2.73 to 3.31 - Mustang Evolution

Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > 2011-2014 V6 Mustang



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 02-04-2015, 01:01 PM   #1
Registered Member
Regular
 
Join Date: Sep 2014
Location: Arizona
Region: Arizona
Posts: 311
2.73 to 3.31

I'm going for my regular service and going to check prices to upgrade to 3.31s. My dealer used FRPP and will honor it under warranty. My biggest question is it worth the cost? I really like to make 6th useful. I commute 110 miles a day mostly highway at 75 mph now I'm just a hair over 1750 rpm. On any incline it hums loudly, I usually have to drop to 5th and get Rpms over 2100. If I have Rpms over 2100 in 6th I don't get the hum/drone, but I'm also hauling *** at that point

Mods = Roush AB and CAI.
Wysh is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-04-2015, 01:07 PM   #2
Registered Member
Regular
 
DiESeven's Avatar
 
Join Date: May 2014
Location: Richmond
Region: Virginia
Posts: 1,909
Be prepared to bend over lubeless when they quote you on the labor to get the job done. When I asked them, they quoted me over $1400 just for labor. If warranty is what you're after and they'll honor it, then it would be worth the cost to you.

I, personally, would go with 3.73s and do it at a reputable shop for cheaper. More funs!
DiESeven is offline   Reply With Quote
Old 02-04-2015, 01:28 PM   #3
Registered Member
Regular
 
Join Date: Sep 2014
Location: Arizona
Region: Arizona
Posts: 311
They are actually pretty reasonable for performance accessories install. It's $80/hr. If they keep it to the 4 hours I've seen quoted elsewhere I should be ok. They quoted me 4 hours for a FULL Roush suspension kit.
Wysh is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-04-2015, 01:46 PM   #4
Registered Member
Regular
 
derklink's Avatar
 
Join Date: Dec 2014
Location: Saint Louis
Region: Missouri
Posts: 110
I have 3.31s but it's an auto. At 70 mph I'm at 2000 rpm. I was lucky and got the install for free. But looking back, I would have also paid a reasonable price. Well worth it, the 2.73s are terribly tall
derklink is offline   Reply With Quote
Old 02-04-2015, 01:50 PM   #5
Staff

Regular
Staff
 
Strange Mud's Avatar
 
Join Date: Aug 2013
Location: Small Town
Region: Connecticut
Posts: 5,022
I got mine from factory and having driven both it's a big improvement. I will suggest to consider how long you will be under wtty at that type of mileage and do you want to consider 3.55's and a tune (this is from someone who isn't interested in tunes) With my MT/3.31 70 mph = 2100 rpm I would prefer 3.55/3.73 (I Think) but don't drive alot.

I will say keeping wtty is good but if you'll be over the limit in one year do you think it's worth it?
__________________
2012 V6 with suspension, shifting, stopping and sound mods.
Strange Mud is offline   Reply With Quote
Old 02-04-2015, 02:30 PM   #6
Registered Member
Regular
 
David Young's Avatar
 
Join Date: Feb 2013
Location: Clinton
Region: Tennessee
Posts: 1,005
If i drove 110 miles per day, i wouldn't go any lower than 3.31's. I went from 3.31's to 3.73's and it was a huge improvement in acceleration.

I'm lucky to drive 50 miles per week . Just go for the 3.31's .
__________________
Little Red. 2011 V6. Automatic Trans., C&L CAI, JLT Catch Can, BBK Ceramic Coated Long Tube Headers with BBK Catted X Pipe, Axle Exchange (American Muscle) Aluminum DriveShaft, GT 500 Lower Control Arms, Koni (orange) Dampers, Steeda Watts Link, Ford Racing 3.73 Gears, Magnaflow Street Series Axle Backs and a few more mods....Wifes car, 2014 Ford Edge Limited.
David Young is offline   Reply With Quote
Old 02-04-2015, 02:36 PM   #7
Registered Member
Regular
 
RaceRed3.7's Avatar
 
Join Date: Dec 2014
Location: Tulsa
Region: Oklahoma
Posts: 227
Quote:
Originally Posted by David Young View Post
If i drove 110 miles per day, i wouldn't go any lower than 3.31's. I went from 3.31's to 3.73's and it was a huge improvement in acceleration.

I'm lucky to drive 50 miles per week . Just go for the 3.31's .
Dang! I drive about 100 a day! Sucks for mileage but fun as hell! (Delivery Driver )
__________________
-SOLD-13.246s@107.81 RaceRed 2013 v6 Mustang, 3.73 gears, MPT 91Race Tune, Axle-Back Straight Pipe, Tower Brace, BMR LCA's, BBK Shorty Headers, BMR Relocation Brackets, Lethal Performance X-Pipe Catless.
-2008 Civic SI...
RaceRed3.7 is offline   Reply With Quote
Old 02-04-2015, 02:52 PM   #8
Registered Member

Regular
 
Socal Stangman's Avatar
 
Join Date: Mar 2014
Location: Temecula Ca.
Region: California
Posts: 1,872
Quote:
Originally Posted by DiESeven View Post
Be prepared to bend over lubeless when they quote you on the labor to get the job done. When I asked them, they quoted me over $1400 just for labor. If warranty is what you're after and they'll honor it, then it would be worth the cost to you.

I, personally, would go with 3.73s and do it at a reputable shop for cheaper. More funs!

I agree. I asked my local dealer for the hell of it and off the top of his head he told me 1400-1600.00...
Socal Stangman is offline   Reply With Quote
Old 02-04-2015, 03:08 PM   #9
Registered Member
Regular
 
rringler's Avatar
 
Join Date: Jan 2014
Location: Estero, FL
Region: Florida
Posts: 402
Quote:
Originally Posted by Socal Stangman View Post
I agree. I asked my local dealer for the hell of it and off the top of his head he told me 1400-1600.00...

I'm with these guys on this. I was thinking about getting this done in the next few months as well but didn't want to give up my warranty, so I asked my dealer about it. Mine said that they would do it no problem and warranty would not be an issue. I then asked about the price for install and they quoted me an 8 hour job at their $100/hr. So it would cost me about $1000 total. I'm still on the fence on if I should get that done or buy a nice set of wheels/tires myself. Good luck!!!


Sent from my iPhone using Mustang Evolution
rringler is offline   Reply With Quote
Old 02-04-2015, 03:20 PM   #10
Registered Member
Commercial Member
Regular
 
au01st's Avatar
 
Join Date: Oct 2014
Location: Alexandria
Region: Louisiana
Posts: 869
Anyone know how high they can adjust your gear ratio by messing with tire sizes with whatever program dealers use? Like if I wanted to avoid tuning but wanted to go higher than 3.31 to say 3.55, would it be possible by adjusting the computer to think I have larger (or smaller, not real sure what the calculation would be) tires than I actually have, or is there a set window that they can't go past?
__________________
Have a Raxiom nav system? Hate having two antennas? Contact me to wire your nav thru your factory satellite radio antenna!

"Holy crap bro. You're a genius." - 2011 Kona Blue
au01st is offline   Reply With Quote
Old 02-04-2015, 03:22 PM   #11
ME Bloodhound
Staff
 
Soccerluvr4's Avatar
 
Join Date: Feb 2012
Location: Sacramento/Bay Area
Region: California
Posts: 14,672
I paid $360 for labor (i supplied the parts) for my gear install. A dealer will most likely charge over double that just for labor.
__________________

Bullitt build paused pending graduation

HID end all thread
Soccerluvr4 is offline   Reply With Quote
Old 02-04-2015, 06:13 PM   #12
Registered Member
Regular
 
sticks123's Avatar
 
Join Date: Jan 2015
Location: Bourbonnais
Region: Illinois
Posts: 518
My shop told me 400.00.


Sent from my iPhone using Mustang Evolution
sticks123 is offline   Reply With Quote
Old 02-04-2015, 06:20 PM   #13
Registered Member
Regular
 
Join Date: Sep 2013
Location: Arlington
Region: Texas
Posts: 79
I've considered this too. I'm debating between getting the 3.31's installed at a shop for $700 parts & labor, then getting the dealership to flash the ecu to match, another $120 or so, or getting 3.55s or 3.73s and a tune for a total of $1100. It's a tough decision.
CUBuffalo is offline   Reply With Quote
Old 02-04-2015, 11:37 PM   #14
Registered Member
Regular
 
derklink's Avatar
 
Join Date: Dec 2014
Location: Saint Louis
Region: Missouri
Posts: 110
3.31 to 3.55 shouldn't be a big difference but 3.73 would be more noticeable. Keep in mind that once you have a tuner, you can use it for other mods. And a tune itself isn't too shabby either
derklink is offline   Reply With Quote
Old 02-05-2015, 12:26 AM   #15
Registered Member
Regular
 
JoeyM91's Avatar
 
Join Date: Aug 2013
Location: Shawnee
Region: Oklahoma
Posts: 1,840
Quote:
Originally Posted by rringler View Post
I'm with these guys on this. I was thinking about getting this done in the next few months as well but didn't want to give up my warranty, so I asked my dealer about it. Mine said that they would do it no problem and warranty would not be an issue. I then asked about the price for install and they quoted me an 8 hour job at their $100/hr. So it would cost me about $1000 total. I'm still on the fence on if I should get that done or buy a nice set of wheels/tires myself. Good luck!!!


Sent from my iPhone using Mustang Evolution
8 hour job for a blind epileptic lemur.

For real though, any shop that quotes you over 4 hours of labor doesn't know what they're doing.

Sent from my SM-G900V using Mustang Evolution mobile app
__________________
2011 V6 Race Red - Airaid CAI , BBK 73mm Throttle Body, 3.73 FRPP Gears, BBK Longtube Headers , BBK Off Road X-Pipe , Borla ATAKs , SR Performance Strut Tower Brace, MPT 91R Tune, Powerstop Rotors and pads, JLT Oil Seperator, Koni STR.T Struts & Shocks, Eibach Pro Line Springs, BMR Adjustable Panhard Bar, J&M Caster Camber Plates, Mickey Thompson Street Comps on 19" Laguna Seca Hyper Black Wheels, Several other aesthetic mods
JoeyM91 is offline   Reply With Quote
Old 02-05-2015, 06:50 AM   #16
Registered Member
Regular
 
Diehard's Avatar
 
Join Date: Mar 2014
Location: North Reading
Region: Massachusetts
Posts: 2,112
Quote:
Originally Posted by au01st View Post
Anyone know how high they can adjust your gear ratio by messing with tire sizes with whatever program dealers use? Like if I wanted to avoid tuning but wanted to go higher than 3.31 to say 3.55, would it be possible by adjusting the computer to think I have larger (or smaller, not real sure what the calculation would be) tires than I actually have, or is there a set window that they can't go past?
3.31 to 3.55 would be about a 2" reduction in tire dia. So I guess you ask your dealer if they can correct for a 2" tire dia change in lieu of asking if they can correct for the gear change. If I am understanding your question correctly. (Of course this is only a speedometer correction.)
__________________
____________________________________________________
14 V6 auto, MCA, PP, BBK Shorties, MMD Hood Struts, Borla Touring A/B's, MAC ProChamber, aFe drop-in Filter
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lets not forget, an opinion is a judgment, viewpoint, or statement about matters commonly considered to be subjective.
Diehard is offline   Reply With Quote
Old 02-05-2015, 09:38 AM   #17
Registered Member
Regular
 
derklink's Avatar
 
Join Date: Dec 2014
Location: Saint Louis
Region: Missouri
Posts: 110
I think the dealer will know what is going on. Dealer will only warrant 3.31s. So anything higher, I would go to a different/cheaper place.
derklink is offline   Reply With Quote
Old 02-05-2015, 09:41 AM   #18
Registered Member
Commercial Member
Regular
 
au01st's Avatar
 
Join Date: Oct 2014
Location: Alexandria
Region: Louisiana
Posts: 869
2.73 to 3.31

Quote:
Originally Posted by derklink View Post
I think the dealer will know what is going on. Dealer will only warrant 3.31s. So anything higher, I would go to a different/cheaper place.

Well that's why I ask. Some dealers are more lenient. I'm prepared to pay more for them to do the install if they put in writing that it's covered. It's easy to say "don't mod if you want to keep your warranty" but much harder to do, lol.

But that was the point of the question. Could they theoretically change my tire size to whatever it needs to be to fix the issue with gear ratios, or is there something else that still has to change? And can their computers make that drastic of a change or will it throw an error code in the system if you try and put 275/60/24 tires in the computer?


Sent from my iPhone using Tapatalk
__________________
Have a Raxiom nav system? Hate having two antennas? Contact me to wire your nav thru your factory satellite radio antenna!

"Holy crap bro. You're a genius." - 2011 Kona Blue
au01st is offline   Reply With Quote
Old 02-05-2015, 07:11 PM   #19
Registered Member
Regular
 
Join Date: Sep 2014
Location: Arizona
Region: Arizona
Posts: 311
The parts guy was mia this morning but I did confirm 3.31 will not void warranty.
Wysh is offline   Reply With Quote
Old 02-06-2015, 10:54 AM   #20
Registered Member
Regular
 
5pointYoBro's Avatar
 
Join Date: Jun 2014
Location: Nashville
Region: Tennessee
Posts: 730
Get 3.55's. I still average 25 mpg when I don't gas it everywhere. Pulls real hard in 2nd and 3rd, you can even pass people on the highway in 6th gear.

I only spent $300 getting them installed too
__________________
2014 GT. Oxford White.
20" Velgen VMB5s on NT555s.
MBRP Race Series Catback Exhaust
Bama 93 Performance Tune
5pointYoBro is offline   Reply With Quote
Old 02-06-2015, 05:49 PM   #21
Registered Member
Regular
 
David Young's Avatar
 
Join Date: Feb 2013
Location: Clinton
Region: Tennessee
Posts: 1,005
My local Ford dealer did my 3.73's for $550 labor. I supplied the gears, fluid, bearing and had them replace the axle seals also.
__________________
Little Red. 2011 V6. Automatic Trans., C&L CAI, JLT Catch Can, BBK Ceramic Coated Long Tube Headers with BBK Catted X Pipe, Axle Exchange (American Muscle) Aluminum DriveShaft, GT 500 Lower Control Arms, Koni (orange) Dampers, Steeda Watts Link, Ford Racing 3.73 Gears, Magnaflow Street Series Axle Backs and a few more mods....Wifes car, 2014 Ford Edge Limited.
David Young is offline   Reply With Quote
Old 02-08-2015, 09:57 AM   #22
Registered Member
Regular
 
jande063's Avatar
 
Join Date: Sep 2014
Location: Virginia Beach
Region: Virginia
Posts: 474
My highway mileage stayed about the same when I went from 2.73 to 3.31, and my city mileage improved by about 3 mpg. I had an independent performance shop install my T2R and gears (only thing I have not done myself due to time constraints) for $425.
__________________
2014 Mustang V6-Built to run TTB, CAM-C, and ESP

Proving to my fellow racers that the disdain that some GT drivers have for V6 drivers is unfounded, one results archive at a time since 2013.
jande063 is offline   Reply With Quote
Old 02-08-2015, 10:29 AM   #23
Registered Member
Regular
 
audioAl's Avatar
 
Join Date: Jun 2012
Region: Texas
Posts: 604
I'd do 3.55:1 for turbo future, 3.73:1 for N/A. Drag racing I'd do 4.56:1 I have 26" tires instead of 28" and my gearing is probably 2.88:1
__________________
2014 DIB 3.7 "Blue Cyclone" on 275/40/18 RE 760 Sports/Sold
2016 ruby red GT 300 A with 3.55:1 gear/SVE resonator delete X-pipe/ UPR catch can/Airaid/AEM/J&M Bushings/ BMR cradle lockout/BMR CB006 brace/BMR cc bolts/S-04 pole position'
audioAl is offline   Reply With Quote
Old 02-08-2015, 10:43 AM   #24
Registered Member
Regular
 
jande063's Avatar
 
Join Date: Sep 2014
Location: Virginia Beach
Region: Virginia
Posts: 474
If you plan on autocrossing, 3.31 is the only rear gear that you want for either the 3.7 or the 5.0, to many shifts, or too much time lugging the motor otherwise. Considering that Vorshlag's TT3 car broke records at pretty much all of the 2014 events it entered, 3.31 is also a pretty good road course gear.
__________________
2014 Mustang V6-Built to run TTB, CAM-C, and ESP

Proving to my fellow racers that the disdain that some GT drivers have for V6 drivers is unfounded, one results archive at a time since 2013.
jande063 is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > 2011-2014 V6 Mustang

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


» Like Us On Facebook



08:10 AM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.