4.10 vs 3.73 gears? - 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 06-28-2015, 10:37 PM   #1
Registered User
Newbie
 
Join Date: Jun 2015
Location: MT
Region: Montana
Posts: 7
4.10 vs 3.73 gears?

Hi
I know this question has been asked lots of times but I couldn't find an answer to my specific question. So, I'm really feel frustrated that my previous 280hp car has a WAAAY greater pull than my current 2.73-equppied 2013 v6.

I have an automatic, and I'm considering the 3.73 or the 4.10. I usually cruise at 75 on interstates, and I couldn't really figure out how to calculate the RPM at 75 on each of these gears. Does anyone have the numbers? or how to calculate them?

Also, I talked to my local shop and the guy there said that going to bigger wheels won't change the actual ratio (I have 17 and planning on going 19) as the height of the tire most likely won't change even when going to larger wheels, how true is that?

Also, does anyone have any of these gears installed on a v6 and can tell us about the MPG?
I do highway driving several times a year and at least once a month (sometimes twice).
Should I go with the 3.90?

Thanks
KAC331 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-28-2015, 10:41 PM   #2
Registered Member

Regular
 
Socal Stangman's Avatar
 
Join Date: Mar 2014
Location: Temecula Ca.
Region: California
Posts: 1,872
I have a manual and went from 2.73 to 3.73. Sometimes I think it's too much and wish had had done 3.55. If I had an auto I'm pretty sure I wouldn't like the 3.73's, that's my opinion. I also believe 4.10's for a DD are way to much. You'll get a lot of different responses so get ready...
Socal Stangman is offline   Reply With Quote
Old 06-28-2015, 10:56 PM   #3
Registered Member
Regular
 
Harm_3.7's Avatar
 
Join Date: Feb 2015
Location: Yuba City
Region: California
Posts: 351
Running 3.73s in my auto and no issues with it. It's not as bad as people make it seem but also you may not like it while others do. As for highway driving it's not too bad I still average like 26ish mpg going like 70 I believe.


IG: justaslow3.7
Harm_3.7 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-28-2015, 10:56 PM   #4
VIG
Registered Member
Regular
 
VIG's Avatar
 
Join Date: Jun 2013
Location: Wilmington
Region: Delaware
Posts: 1,238
4.10 vs 3.73 gears?

As for changing the diameter of your tires, he's right.

Believe it or not, 19s with either 255/40 or 245/45 will actually have a smaller overall diameter than the 17s with 215/65 or 225 (or whatever they are).

I changed from the 215/65/17s to 255/40/19s. The difference is almost -1" in overall diameter.
__________________
IG: workshardplayshard
VIG is offline   Reply With Quote
Old 06-28-2015, 11:17 PM   #5
Registered Member
Regular
 
Join Date: Jun 2014
Location: STL
Region: Missouri
Posts: 170
If you want to know RPM for each gear, take your current RPM at 75, and multiply it by the new gear ratio over your current one.

Example, if currently your RPM at speed is 1900, your new RPM would be:

1900 * 3.73/2.73 = 2596 RPM
1900 * 4.10/2.73 = 2853 RPM


You can do the same with tire diameter. If you go from a 28" tire to a 27" tire, your new RPM will be 28/27 * old RPM. (as Diehard corrected)
__________________
2011 Mustang 3.7: 13.2 @ 105
BBK Shorty, MRT H, Borla S, 3.55 Gear, MPT Tuned.
LiveWire003 is offline   Reply With Quote
Old 06-29-2015, 08:16 AM   #6
Registered Member
Regular
 
Diehard's Avatar
 
Join Date: Mar 2014
Location: North Reading
Region: Massachusetts
Posts: 2,112
Quote:
Originally Posted by LiveWire003 View Post
If you want to know RPM for each gear, take your current RPM at 75, and multiply it by the new gear ratio over your current one.

Example, if currently your RPM at speed is 1900, your new RPM would be:

1900 * 3.73/2.73 = 2596 RPM
1900 * 4.10/2.73 = 2853 RPM


You can do the same with tire diameter. If you go from a 28" tire to a 27" tire, your new RPM will be 28/27 * old RPM.
Correct except as noted.
A smaller dia tire should have to turn more and therefore higher rev's.
__________________
____________________________________________________
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 06-29-2015, 08:33 AM   #7
Kevin.Cook
Guest
 
Posts: n/a
3.73s in my auto DD is not a huge boost over the 3.31s I had. But I am still in the break in process. However, when on the highway, I can literally see my gas needle start to drop. HAHA. I say now with my current mods and 93 Race tune, my car is on par with the gas mileage of a stock GT.

SO just be prepared to fill up your tank more frequently if you do highway driving if you switch gears. Other then that, I have nothing else to say. Normal cruising is still pretty average. 40-45 is at 1200 or so RPM. I get about 19 AVG MPGs with combined City and Highway driving.

Lastly, make sure to take the car to somewhere reputable that will warranty the parts and work.
  Reply With Quote
Old 06-29-2015, 08:50 AM   #8
Registered Member
Regular
 
shunc01's Avatar
 
Join Date: Dec 2011
Region: Massachusetts
Posts: 1,948
Quote:
Originally Posted by Kevin.Cook View Post
3.73s in my auto DD is not a huge boost over the 3.31s I had. But I am still in the break in process. However, when on the highway, I can literally see my gas needle start to drop. HAHA. I say now with my current mods and 93 Race tune, my car is on par with the gas mileage of a stock GT.

SO just be prepared to fill up your tank more frequently if you do highway driving if you switch gears. Other then that, I have nothing else to say. Normal cruising is still pretty average. 40-45 is at 1200 or so RPM. I get about 19 AVG MPGs with combined City and Highway driving.

Lastly, make sure to take the car to somewhere reputable that will warranty the parts and work.
Hey Kevin I was wondering did you upgrade you're differential cover or still at stock? How many miles now in your break in period? Thanks man

MPT TUNE, Borla S-Type, Airaid Cai, Ford racing X pipe, Mac ceramic shorty headers, 2010 GT500 rims, 35% tint, Sr Springs, J&M phb, camber bolts, blacked out side markers, front and taillights.
__________________
2016 GT RACE RED MANUAL aka " RAGING BULL"
Mods:
Borla stypes cat back exhaust, tint kit all lights, 5.0 race red shift knob, MMD V SERIES SPOILER... and more to come...
shunc01 is offline   Reply With Quote
Old 06-29-2015, 08:53 AM   #9
Registered Member
Regular
 
TedG's Avatar
 
Join Date: Jan 2014
Location: Florida/Ohio
Region: Florida
Posts: 227
Changing to 3.73's was the best idea to date. I averaged over 25mpg from south Florida to northern Ohio at legal speed limits. Those gears greatly improved the car's performance.


I had the stock punkin' cover changed over the the Ford Racing finned cover.
__________________
Become an Organ Donor today: http://donatelife.net/register-now/
Save as many as 50 lives. Thanks.
TedG is offline   Reply With Quote
Old 06-29-2015, 09:06 AM   #10
Registered Member
Regular
 
shunc01's Avatar
 
Join Date: Dec 2011
Region: Massachusetts
Posts: 1,948
Quote:
Originally Posted by TedG View Post
Changing to 3.73's was the best idea to date. I averaged over 25mpg from south Florida to northern Ohio at legal speed limits. Those gears greatly improved the car's performance.


I had the stock punkin' cover changed over the the Ford Racing finned cover.
Do you know how much your Ford racing cover hold for the oil?

MPT TUNE, Borla S-Type, Airaid Cai, Ford racing X pipe, Mac ceramic shorty headers, 2010 GT500 rims, 35% tint, Sr Springs, J&M phb, camber bolts, blacked out side markers, front and taillights.
__________________
2016 GT RACE RED MANUAL aka " RAGING BULL"
Mods:
Borla stypes cat back exhaust, tint kit all lights, 5.0 race red shift knob, MMD V SERIES SPOILER... and more to come...
shunc01 is offline   Reply With Quote
Old 06-29-2015, 09:10 AM   #11
Staff

Regular
Staff
 
Strange Mud's Avatar
 
Join Date: Aug 2013
Location: Small Town
Region: Connecticut
Posts: 5,022
Quote:
Originally Posted by Kevin.Cook View Post

make sure to take the car to somewhere reputable that will warranty the parts and work.
that is VERY important.

I read Ted's post with 25 MPG and was awed...till I saw legal speed limits. I've seen the legal limits posted often.
__________________
2012 V6 with suspension, shifting, stopping and sound mods.
Strange Mud is offline   Reply With Quote
Old 06-29-2015, 10:14 AM   #12
Registered Member
Regular
 
5pointYoBro's Avatar
 
Join Date: Jun 2014
Location: Nashville
Region: Tennessee
Posts: 730
I have an Auto and am happy with my 3.55's. Way better pull than the stock 2.73's.

And really didn't funk with my gas mileage that much. Average like 22-23.
__________________
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 06-29-2015, 03:03 PM   #13
Registered Member
Regular
 
Join Date: Jun 2015
Location: HARTWELL LAKE AREA
Region: South Carolina
Posts: 435
Ideal ratio for performance and fuel economy is 3.55....best of both worlds
ALLYDRIVER1 is offline   Reply With Quote
Old 06-29-2015, 04:57 PM   #14
Registered Member
Regular
 
5pointYoBro's Avatar
 
Join Date: Jun 2014
Location: Nashville
Region: Tennessee
Posts: 730
3.55 and 3.31 are good too if you plan on supercharging or running a turbo kit
5pointYoBro is offline   Reply With Quote
Old 06-29-2015, 05:23 PM   #15
Registered Member
Regular
 
FastFord13's Avatar
 
Join Date: Apr 2013
Location: Montreal
Region: Canada
Posts: 4,263
Quote:
Originally Posted by ALLYDRIVER1 View Post
Ideal ratio for performance and fuel economy is 3.55....best of both worlds
^^This, I love my 3.73s but I would have been just as happy with 3.55s while getting a bit better mpgs.

Sent from LG G3.
FastFord13 is offline   Reply With Quote
Old 06-29-2015, 05:36 PM   #16
Registered Member
Regular
 
Mustangs's Avatar
 
Join Date: Apr 2012
Location: Glendora California
Region: California
Posts: 519
3.55s are enough shifting as it is. I wouldn't want any more gear than this for city driving.


Sent from my iPhone using Mustang Evolution
Mustangs is offline   Reply With Quote
Old 06-29-2015, 07:12 PM   #17
Registered User
Newbie
 
Join Date: Jun 2015
Location: MT
Region: Montana
Posts: 7
Alright, I'm probably going with the 3.73s then! Is there anyone who went from the stock 2.73 to 3.73 who can tell us about their experience in terms of gains?

I find the 2.73s REALLY bad, and since I'm switching anyways, I'd hate to see just little gains and then wish I'd gone with the 4.10s
KAC331 is offline   Reply With Quote
Old 06-29-2015, 07:16 PM   #18
Registered Member
Regular
 
FastFord13's Avatar
 
Join Date: Apr 2013
Location: Montreal
Region: Canada
Posts: 4,263
I went from 2.73s to 3.73s and the difference is huge! I was debating 3.73 or 4.10s, but in the end i decided to go with 3.73s.

Bite off the line is excellent and highway rpm is great. Before with my 2.73s cruising Rpm was so low in 6th that any passing or hill climbing absolutely required a down shift, i found myself a lot of the time cruising in 5th which kinda made 6th pretty useless for me. You will lose a bit of highway mpg but its not dramatic by any means.
I don't want to tell you not to go 4.10s but you definitely won't be disappointed with 3.73s, especially if you understand and except that you'll lose a couple of highway mpgs. It makes our cars so much more fun to drive!

Sent from LG G3.
FastFord13 is offline   Reply With Quote
Old 06-29-2015, 07:27 PM   #19
Staff
Regular
Staff
 
scottydsntknow's Avatar
 
Join Date: Apr 2013
Location: JB MDL
Region: New Jersey
Posts: 16,592
There is no definite answer and it will depend a lot on your combo. Stock tire height with 4.10s in your car=2500 RPM on the highway at 70mph. If that's not a problem then go wtih 4.10s and go with a taller 28" tire if you are getting new tires anyway.

If you are concerned about the RPM on the highway step it down a little. If you plan on going with a Procharger later on down the line, you'll want to wait to do gears then or go with 3.55s at most.

All depends as I said, no combo exists in a vacuum where X>Y when it comes to stuff like this. Also realize that the 6R 1st gear is a 4.17 ratio which is a BIG departure from previous years. You do not need a huge rear gear to get going like back in the day. The Coyote guys with the auto actually start going slower if they go anymore than 3.31s. Most of the ones that know what they are doing just leave in the 3.15s . As for the V6, it obviously needs more help off the line so taller gears will be better but again, it all depends on what you want.
__________________
2000 Mustang GT Steeda #0048

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
scottydsntknow is offline   Reply With Quote
Old 06-29-2015, 09:45 PM   #20
Registered Member
Regular
 
Diehard's Avatar
 
Join Date: Mar 2014
Location: North Reading
Region: Massachusetts
Posts: 2,112
This simulation of different speeds with different gears may be of interest to you.
Put together by Ish416

The truth about gears..
__________________
____________________________________________________
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 06-30-2015, 01:49 AM   #21
Registered Member
Regular
 
mutaz102's Avatar
 
Join Date: Jul 2014
Location: Lawrence
Region: Kansas
Posts: 45
This might be off the topic, but I just wanted to know how does changing gear ratio affect manual car? I know that it would help autos a lot, but what does it do for manual?!
mutaz102 is offline   Reply With Quote
Old 06-30-2015, 05:24 AM   #22
Registered Member
Regular
 
20prima10's Avatar
 
Join Date: May 2014
Location: Flint mi
Region: Michigan
Posts: 765
It does the same things to manuals as an auto.


Sent from my iPhone using Mustang Evolution
20prima10 is offline   Reply With Quote
Old 06-30-2015, 06:47 AM   #23
Staff
Regular
Staff
 
scottydsntknow's Avatar
 
Join Date: Apr 2013
Location: JB MDL
Region: New Jersey
Posts: 16,592
Quote:
Originally Posted by mutaz102 View Post
This might be off the topic, but I just wanted to know how does changing gear ratio affect manual car? I know that it would help autos a lot, but what does it do for manual?!
Its not off topic and it actually does not help some autos specifically the 11+ GT, it actually slows them down.

Again, its all specific to the gearing of the transmission (not just final ratio), rear tire size and the powerplant in the vehicle. The old mantra "3.73s for stick and 4.10s for auto" is really for the 10-down cars and still is not super accurate because its like a one size fits all statement without taking anything else into account.

As for how they work... well imagine you are 12 years old again and riding your Schwinn 21 speed bike (or a Huffy 10 speed in my case because my Parents were cheap...). Remember how easy it was to take off in 1st gear vs like... 8th gear. Well that's basically what steeper rear gears do. Make it easier for the motor to move the car and you'll accelerate faster but there are trade offs in top speed and if you are tracking the car you need to worry about shift points especially. And if its a street car you don't want your overall 1st gear to be ridiculously tall or you'll have to shift into 2nd almost instantly and have traction issues as well.
__________________
2000 Mustang GT Steeda #0048

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
scottydsntknow is offline   Reply With Quote
Old 06-30-2015, 11:41 AM   #24
ME Bloodhound
Staff
 
Soccerluvr4's Avatar
 
Join Date: Feb 2012
Location: Sacramento/Bay Area
Region: California
Posts: 14,672
And the short version of that ^

*A higher numerical gear means every single one of your gears gets shorter* So while it is a little different depending on manual or automatic, the same idea applies to both.




Bullitts are better than Bullets
__________________

Bullitt build paused pending graduation

HID end all thread
Soccerluvr4 is offline   Reply With Quote
Old 06-30-2015, 12:20 PM   #25
Registered Member
Regular
 
Diehard's Avatar
 
Join Date: Mar 2014
Location: North Reading
Region: Massachusetts
Posts: 2,112
Quote:
Originally Posted by Soccerluvr4 View Post
And the short version of that ^

*A higher numerical gear means every single one of your gears gets shorter* So while it is a little different depending on manual or automatic, the same idea applies to both.




Bullitts are better than Bullets
What would be interesting to know is what exactly do the tuners do to the shift points on an auto.
I assume(I'll have to go check it out.) that with a lower gear ratio it must come close to redline at each shift point. If that wasn't the case then I guess they might raise the shift point RPM.
__________________
____________________________________________________
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 06-30-2015, 01:16 PM   #26
Registered Member
Regular
 
Voltwings's Avatar
 
Join Date: May 2014
Location: Houston
Region: Texas
Posts: 3,448
Quote:
Originally Posted by Diehard View Post
What would be interesting to know is what exactly do the tuners do to the shift points on an auto.
I assume(I'll have to go check it out.) that with a lower gear ratio it must come close to redline at each shift point. If that wasn't the case then I guess they might raise the shift point RPM.
Load and rpm is my guess. I've never tuned an auto personally, but most tables in a tune are based on a load x rpm grid. A simple way to think of load would be "the work being done," in simplest terms.

Imagine the 2.73 and 3.73 as gears in a mountain bike. Your legs have to work harder to turn the 2.73s over than the 3.73s, so you will be hitting a different load value at any given rpm value and things will be screwy. I imagine this more affects down shifts than up shifts, but you can see its obviously a key portion of both.
Voltwings is offline   Reply With Quote
Old 06-30-2015, 01:41 PM   #27
Registered User
Newbie
 
Join Date: Jun 2015
Location: MT
Region: Montana
Posts: 7
Are the the two brands offered on American Muscle have pros and cons?

Should I go with Dana or FR?
KAC331 is offline   Reply With Quote
Old 06-30-2015, 02:23 PM   #28
Staff
Regular
Staff
 
scottydsntknow's Avatar
 
Join Date: Apr 2013
Location: JB MDL
Region: New Jersey
Posts: 16,592
Ford Racing
__________________
2000 Mustang GT Steeda #0048

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
scottydsntknow is offline   Reply With Quote
Old 06-30-2015, 02:24 PM   #29
Kevin.Cook
Guest
 
Posts: n/a
I 2nd Ford Racing. But first, see if the shop will warranty customer provided parts (doubt it). Might be best to let the shop provide them if they will warranty all of their own parts and labor. Last thing you want is a ton of gear noise and be screwed cuz of no warranty.
  Reply With Quote
Old 06-30-2015, 04:42 PM   #30
Registered Member
Regular
 
Diehard's Avatar
 
Join Date: Mar 2014
Location: North Reading
Region: Massachusetts
Posts: 2,112
Quote:
Originally Posted by Voltwings View Post
Load and rpm is my guess. I've never tuned an auto personally, but most tables in a tune are based on a load x rpm grid. A simple way to think of load would be "the work being done," in simplest terms.

Imagine the 2.73 and 3.73 as gears in a mountain bike. Your legs have to work harder to turn the 2.73s over than the 3.73s, so you will be hitting a different load value at any given rpm value and things will be screwy. I imagine this more affects down shifts than up shifts, but you can see its obviously a key portion of both.
Yes since the cars computer relies on the load as one of the factors determining the shift point, I was thinking the load value would be effected by the gear change and would require some adjustment.

As far as my bike, I prefer to stay in the lowest gear ratio that the strength of my legs can handle, rather than increasing my RPM. Although they do say there is an optimum RPM for bike riding which should be obtained by shifting gears.
(I do still remember the basic mechanical advantage of simple machines from my high school physics classes.)
As always, thanks for your help.
__________________
____________________________________________________
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 07-21-2015, 01:23 PM   #31
Registered User
Newbie
 
Join Date: Jun 2015
Location: MT
Region: Montana
Posts: 7
Here's a follow up:

So I had the 3.73 installed and hit the 500 mark. I can say there is a big difference, but it's not as big as I expected. All the reviews made it seem like the difference was HUGE.

Bottom line is, it is good, will put a smile on your face, and I'm satisfied with it, though I'll probably go with a different shop next time . Speaking of which, once I got the car there was noise coming from the rear gear, I could literally hear the gear spinning. It was loud but after I drove for about 50 miles it kind of faded away. It is still there though especially when decelerating, or at high rpm on 5th or 6th gear. I will have the fluid changed tomorrow, so I will see what the shop will do about it.
KAC331 is offline   Reply With Quote
Old 07-21-2015, 01:31 PM   #32
Registered Member
Regular
 
FastFord13's Avatar
 
Join Date: Apr 2013
Location: Montreal
Region: Canada
Posts: 4,263
The difference between 2.73s and my 3.73s were huge, but I'm in a manual and not the auto. Some say the auto's could handle 4.10s nicely, but the manuals not so much. I guess it depends on the persons goals and expectations.

I must be one of the lucky ones to have a good gear install, when I spoke with my shop before the install they were so straight forward and told me because my car at the time only had 10k on it they were just doing the gear and pinion and that the reason they only used Ford racing gears is because the install is basic and straight forward.
18k still great, original RP in the rear.
Sent from LG G3.
FastFord13 is offline   Reply With Quote
Old 07-21-2015, 01:33 PM   #33
Kevin.Cook
Guest
 
Posts: n/a
I had this also. New fluid and friction modifier won't change this. This is due to the shimming being slightly off. After going through the gear install twice on my car, I can assure you it is nothing to worry about, because it is not off to cause an issue. It is just off enough to be annoying. At least I know now the pinion bearing isn't and wasn't at risk. I paid an extra $500 to find that out though

I just deal with the slight noise at 50 mph. It is only upon decelerating until I hit 45-48mph. If it is really bad then maybe you want to pay or take it back for a rebuild. Up to you!

I went from 3.31s and was/still am disappointed. I wish I would have not touched this.

Thanks to Alex and AM though for helping me through that ordeal.
  Reply With Quote
Old 07-21-2015, 01:55 PM   #34
Registered Member
Regular
 
shunc01's Avatar
 
Join Date: Dec 2011
Region: Massachusetts
Posts: 1,948
As far as my experience, i am very satisfied with it, i dont have any gear whine at all, i had a little leaked from my pinion which my shop changed it with no charge and they told me that this is known when you changed your gears and part of it is from my tune too MPT really dialled it in that for me its night and day from my 3:31 swap.
__________________
2016 GT RACE RED MANUAL aka " RAGING BULL"
Mods:
Borla stypes cat back exhaust, tint kit all lights, 5.0 race red shift knob, MMD V SERIES SPOILER... and more to come...
shunc01 is offline   Reply With Quote
Old 07-21-2015, 11:54 PM   #35
Registered User
Newbie
 
Join Date: Jun 2015
Location: MT
Region: Montana
Posts: 7
Yeah I'm not expecting it to go away after the new fluid, but I'm going to talk to the shop about this when I go there for the fluid change. And I didn't say I'm not satisfied with it, I am, and if I had to go through this again I would. But, I think the reviews made me expect more.

What's concerning me is that I get some vibration when I'm around 75-85, the whole car starts vibrating. I used to get similar vibrations at certain RPMs due to my Roush axle-back, but now I get them mostly when I'm in 5th gear around that speed, shifting into 6th resolves the problem. Though at the same RPMs at lower speed everything is fine. So it is definitely not caused by the axle back, it is either due to an improper install of the gears or something that has to do with the driveshaft!

I know that our driveshafts are not designed to take too much, and the fact that it is spinning more at the same speeds had me concerned about it.

What do you think?
KAC331 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Difference between 2.3 rear axle gears and 5.0 rear axle gears 93mstnglx 2.3 Mustang 9 07-07-2013 06:12 PM
4:10 gears vs 4:30 gears SwatKatz901 1996-2004 Mustang GT 5 03-24-2012 04:17 PM
3:55 Gears vs 3:73 gears 06Blue 2005-2010 Mustang GT 19 01-04-2012 07:57 PM
NEED HELP WITH GEARS!! Motive 4.10 gears? Cant find ford racing? Camaro Eater Pre-2005 V6 Mustang 4 06-23-2010 11:57 AM
Factory Gears Vs. Racing Gears tire Pre-2005 V6 Mustang 0 07-21-2003 05:02 AM

» Like Us On Facebook



10:28 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.