On Dec 28, 9:24?am, twk <t..._at_sleepless.knights.com> wrote:

> In article

> <0b45a5e7-9a94-43df-8d6e-aff1242b2..._at_f15g2000yqo.googlegroups.com>,

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> ?"NoOptio..._at_aol.com" <patrick.mckenzi..._at_gmail.com> wrote:

> > On Dec 27, 12:00?pm, twk <t..._at_sleepless.knights.com> wrote:

> > > In article

> > > <0c1afe9d-c32d-436a-99c1-1a1364ff4..._at_n39g2000yqh.googlegroups.com>,

>

> > > ?"NoOptio..._at_aol.com" <patrick.mckenzi..._at_gmail.com> wrote:

> > > > On Dec 26, 8:59?am, "John C." <j..._at_shore.net> wrote:

> > > > > "NoOptio..._at_aol.com" <patrick.mckenzi..._at_gmail.com> wrote in message

>

> > > > >news:0f7edca3-e13d-47f0-a70b-89afcd967211_at_f11g2000yql.googlegroups..com...

>

> > > ? ? ? ?----- ?Lil snip ?-----

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> > > ? ? ?----- Lil more snip -----

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> > > Speaking of rears and gears. I'm putting mine off again, had to take out

> > > a couple of trees before they took out my house this freezing rain

> > > season. That set me back $900. Crap, save a dollar, spend two.

>

> > > I have an '09 v6 with the 3.32, and of course, one wheel drive. Auto

> > > trans. I had planned on the 8" 3.73, and limited slip. But after reading

> > > a few forums I'm wondering if the 3.55 gears will be better.

>

> > > I drive to work every day, about 20 miles on the interstate. I also plan

> > > on doing some interstate sight seeing a couple of times a year. I'd like

> > > the low gears for get up and go, but will there be much of a difference

> > > in MPG and acceleration between the 2 gears?

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> > > Plus, with the 3.55 gears I can use my 7" axle, saving a little money..

> > > Or is that a bad idea? I understand I could break a 3.73 pinion on a 7"

> > > axle with a v6. Is that right? It's not like I'll ever be near 300 hp

> > > with his car.

>

> > > I'm still leaning toward the 8" 3.73. I'm just fishing for opinions.

> > > Thanks.

>

> > 3.55 is considered an aggressive street gear.

> > 3.73 is considered a street/strip gear.

>

> > For lower reving and/or pushrod motors I'd follow this rule to a tee.

> > For smoother, higher reving and/or OHV motors you can get away with

> > going more aggressive.

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> > The use you describe for your car I wouldn't advise anything more than

> > 55s.

>

> > Patrick

>

> Thank you to both of you. I may have to go with the 55s.

>

> My '94 v6, auto trans came with a 2.73. Why did Ford even DO that? The

> 3.73 I had installed seemed to actually improve my MPG. WOW, did that

> ever wake up that car. But then, that car was turning 1500 rpm at 55

> mph. (I might be a little off on that). I don't think it ever got into

> it's power range. So that is why I was leaning towards the 3.73 again.

>

> The 55s are looking better...

There's going to be a dramatic difference going from 2.73s to 3.55s.

Most who complain about 55s "not being aggressive enough" are changing

from a 3.08.  You should be more than happy with 55s (hell, 3.27s

might be okay), especially when you do the amount of highway driving

you do.

Patrick