3.27 to 3.55

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dlsdj

New Member

May 8, 2003

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Corpus Christi, TX

Feb 15, 2004

#1

• Feb 15, 2004

• #1

Just wondering if a speed-cal is needed for this change?

 

Sam98

Founding Member

Mar 15, 2002

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Albuquerque, NM

Feb 15, 2004

#2

• Feb 15, 2004

• #2

dlsdj said:

Just wondering if a speed-cal is needed for this change?

Click to expand...

If you don't mind your speedometer reading about 71 when you're really going 65 and you don't care about the extra 8.5% mileage on the odometer, then the answer is no. Also, if you have a 99+ Mustang the answer is no because you can compensate for the gear change by changing the scalar in the PCM. Otherwise, you will need it.

 

stangman

15 Year Member

Jul 10, 2003

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in a 3 bed, 2 bath

Feb 15, 2004

#3

• Feb 15, 2004

• #3

why are you doing such a small gear change?????? i've driven a buddies car with 3.55 & then i jumped in my car & couldn't tell a difference at all. if this a upgrade for just a little more get up & go, your would be better to spend your money on at least 3.73's imo

 

Bone Racing

New Member

Sep 7, 2003

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Long Island, NY

Feb 15, 2004

#4

• Feb 15, 2004

• #4

yes its needed for ANY CHANGE....
but that gear change is very small...u prolly wont notice it

 

03-s281

New Member

Jan 20, 2004

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Stangville,TN

Feb 15, 2004

#5

• Feb 15, 2004

• #5

3.55 is a good street gear.
The change in the first 3 gears with 3.73's vs 3.55's is not significant.
You would notice a little in 4th and 5th.
If you dont hardly ever hit the strip I wouldnt worry.
You'll still be coming out of 1st @ 15mph in normal driving.
I like mine, even though I'm fixin to go 4.10's

 

decoy562

New Member

Oct 9, 2003

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Acworth, GA

Feb 15, 2004

#6

• Feb 15, 2004

• #6

I would personally go with 3.73's or 4.10's.

 

cold96snake

20+ Year Stangneter

Jan 26, 2004

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Truly, out to sea

Feb 15, 2004

#7

• Feb 15, 2004

• #7

4.10's!!!

 

S

STEVEATFORD

New Member

Sep 18, 2002

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GAITHERSBURG MD

Feb 15, 2004

#8

• Feb 15, 2004

• #8

i installed 3.55 in my car and then installed 3.73 big dif in the 3.55 vs 3.73
3.55 is a waste of time and money

 

2k2SilverBullet

Founding Member

Jul 30, 2002

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Missouri

Feb 15, 2004

#9

• Feb 15, 2004

• #9

how do you change the SCALAR, and what is that

 

B

Blue1

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Feb 2, 2004

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Feb 15, 2004

#10

• Feb 15, 2004

• #10

I have 3.55 gears in my '91 5.0 auto and they are awesome. I got on the highway and see 80+ frequently (early fast lane rush hour around here) and the 3.27s I had in there are probably worth two mpg at those speeds, but it is a nice compromise.

Given that I have only 5oo mile on my new GT (5-speed with 3.27s) I have noticed a severe lack of torque (relative to the 5.0) that would require 3.73s at least.

Blue1

 

forpit2000gt

Founding Member

Jun 30, 2002

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Columbia, SC

Feb 15, 2004

#11

• Feb 15, 2004

• #11

don't waste time with 3.55, go at least 3.73. 4.10s still not to much. Please don't let me hear about fuel mileage. I also find it is easier to drive around town with 4.10s. Highway driving is fine too.

 

COramprat

...I can take it. I think.

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Mar 2, 2003

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Sea of Tranquility

Feb 15, 2004

#12

• Feb 15, 2004

• #12

The 3.55's are a good gear for th 5.0 engines but for the 4.6 the minimum I would go with is 3.73's.

 

00s281sc368

New Member

Dec 14, 2003

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Fremont, CA

Feb 15, 2004

#13

• Feb 15, 2004

• #13

coramprat said:

The 3.55's are a good gear for th 5.0 engines but for the 4.6 the minimum I would go with is 3.73's.

Click to expand...

It depends how much power you make...

 

forpit2000gt

Founding Member

Jun 30, 2002

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Columbia, SC

Feb 15, 2004

#14

• Feb 15, 2004

• #14

I think we are talking about a NA Mod motor. Even If I had 433 rwhp, I would go with 3.73.

 

COramprat

...I can take it. I think.

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Mar 2, 2003

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Sea of Tranquility

Feb 16, 2004

#15

• Feb 16, 2004

• #15

00s281sc368 said:

It depends how much power you make...

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I understand that. Pretty much a given if you are planning on S/C or turbo, go with 3.73's. I just think 3.27's to 3.55 is not going to gain a whole lot in any application using the 4.6. The 5.0 is a lower revving engine so 3.55's work better in most cases there. And if you decide on 3.73's or 4'10's then the Speedcal or computer flash is a must.