Did I make a mistake?
06-04-2010, 09:42 AM
#21
3rd Gear Member
Join Date: May 2005
Location:
Posts: 632
And to be honest, I think the auto could use a slightly more aggressive gear ratio too.
They should option the 3.31 on them.
They put the 3.15 in there for the fuel economy reasons of getting equal (and in the case of city driving a bit better) gas mileage as the manual.
Auto with 3.31's paddle shifter and sport mode button should come for 2012 if I were running Ford.
06-05-2010, 11:56 PM
#22
4th Gear Member
Join Date: Feb 2006
Location:
Posts: 1,961
Have just been watching the market for a clean Fox to show up and plan on buying a 5.0 GT in probably 4 or 5 years.
06-13-2010, 10:16 AM
#24
Join Date: Jun 2010
Location: Tx
Posts: 1
Gear ratio
I just ordered a 2011 Mustang GT Premium package. I have until Thursday this week to finalize the order before it is official. I am new to car tech, and I am clueless when it comes to the right rear anxle ratio. I do a lot of highway driving, but I also like those quick starts from a stop. Burning the tires is not my thing. I ordered the 3.55 gear ratio. Is there a large difference in performance/gas mileage between the standard ratio and the 3.55 ratio.
Thanks
Thanks
06-14-2010, 01:29 PM
#25
1st Gear Member
Join Date: Feb 2010
Location: Ohio
Posts: 81
Honestly unless I planned on tracking the car A LOT and running tall slicks...I would stick with the 3.31s...perfect for the daily driver and proven to be plenty potent enough at the strip as well...
06-14-2010, 08:14 PM
#26
2nd Gear Member
Join Date: Feb 2010
Location: Virginia
Posts: 464
I love the 3.73s on the 6 speed. It feels comparable to the 4.10s that I had installed in the 2010 (from the stock 3.31). They simply pull great.
And, you don't have to force the car into first when accelerating from 5 MPH -- second is low enough to do the job.
If forced induction becomes common on the 5.0s, I could see where folks will be sticking with the 3.31 on the 6-speed. But, naturally aspirated, the 3.73 was and remains a "must have" for me with the 6-speed.
And, you don't have to force the car into first when accelerating from 5 MPH -- second is low enough to do the job.
If forced induction becomes common on the 5.0s, I could see where folks will be sticking with the 3.31 on the 6-speed. But, naturally aspirated, the 3.73 was and remains a "must have" for me with the 6-speed.
07-06-2010, 02:05 PM
#27
1st Gear Member
Join Date: May 2010
Location: NY
Posts: 63
The first part is purely subjective. Not sure how needing to shift more often and having higher revs in each gear at any given speed = more fun.
The second part is completely wrong. Your highway mileage will drop about a bit over the 3.55's and a bit more over the 3.31's (a rough guesstimate would be 1.5 mpg worse than 3.31's and 1 mpg worse the 3.55's)
To the OP, the advantage of the 3.73's in DD is that you can short shift or even skip shift more often.
And you could also start out in 2nd easier too if you choose.
So I would not say it's overkill, but if you have no plans on racing the car, whether that be drag, track or illegal street, there was probably little to no reason for you to get the 3.73's.
The 3.31's will do just fine for those not interested in racing in the slightest.
The 3.55's is the best of both worlds and IMHO the best gear ratio for drag racing with the 5.0, especially if you plan to mod the car with 10-40 hp more and don't plan on running DR's or slicks at the track.
It's the ratio I will order mine with.
The second part is completely wrong. Your highway mileage will drop about a bit over the 3.55's and a bit more over the 3.31's (a rough guesstimate would be 1.5 mpg worse than 3.31's and 1 mpg worse the 3.55's)
To the OP, the advantage of the 3.73's in DD is that you can short shift or even skip shift more often.
And you could also start out in 2nd easier too if you choose.
So I would not say it's overkill, but if you have no plans on racing the car, whether that be drag, track or illegal street, there was probably little to no reason for you to get the 3.73's.
The 3.31's will do just fine for those not interested in racing in the slightest.
The 3.55's is the best of both worlds and IMHO the best gear ratio for drag racing with the 5.0, especially if you plan to mod the car with 10-40 hp more and don't plan on running DR's or slicks at the track.
It's the ratio I will order mine with.
I'm speaking of the Automatic transmissions in the early 2000 F-bodies, but the same principle I believe holds. I had my first Automatic Trans Am with the standard Gear ratio (I beleive it was a 2.73). 2 years later, we bought a second F-body Z28 but with the 3.23's (same transmission, just different gearing) As a daily driver, the 3.23's were a bit quicker from a standstill, provided you could get traction. But in all honesty, under most conditions, it was 'easier' to get a quick start with the 2.73's because there was a little less chance of absurd wheelspin if you gave it just a bit too much gas.
Also, I actually Disliked the driveability of the 3.23s. Every gear is effectecte by this ratio..and I found myself in the 3.23 Z28 already in 3rd gear with a sharp downshift at the same point the 2.73 was only in 2nd gear becasue of the taller ratio. With that said, other than from a complete standstill, the gearing was set up so 3.23 was less driveable from a performance perspective than the lower ratio.
Finally, I will also agree with the fuel mileage part. At 70 mph in top gear, will will be running higher rpm's with the more aggressive ratio, and thus using more fuel (from my experience, I'd guess 1-1.5, MAYBE approaching 2mph less than with the least aggressive gearing.)
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