Gearing In Automatics?

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06GTVERT4DE

New Member

Dec 28, 2005

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Feb 28, 2006

#1

• Feb 28, 2006

• #1

When I had my 1998 GT convertible (5-speed), one of the most noticeable things I did to "wake it up" was to have 3.73's installed. I also had CAI, FM exhaust and a SCT programmer. It was quite different at that point than stock. I now have an automatic in my 06 GT vert and I am wondering if changing gears would make a similar type of experience. I just did CAI and SCT XCAL II and it is awesome. I am just wondering if gearing would also make a huge difference. Any thoughts here?

 

G

gpp

Member

Jul 3, 2005

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Feb 28, 2006

#2

• Feb 28, 2006

• #2

does the same for the 06 as your 98.i put ford 3.73 in my 06 automatic and made a huge differance.turns about 2100 rpm at 60 in overdrive.do it,you will be glad you did.

 

D

discofan

Member

Apr 21, 2005

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Feb 28, 2006

#3

• Feb 28, 2006

• #3

I had Ford 3.73s installed in my 2005 GT w/automatic and they get me running faster...

No noticeable gas mileage difference either...

Two steps up from the stock 3.31 does make a big difference!!!

Dave

 

Mike97gt

it doe snot

Founding Member

Jan 26, 1999

10,633

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the people's republic of massachusetts

Feb 28, 2006

#4

• Feb 28, 2006

• #4

i agree with these guys about gears but if it was my car i would go with 4.10 or even 4.30's

 

K

Kilmar

Member

Jan 23, 2006

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Mar 1, 2006

#5

• Mar 1, 2006

• #5

4.10s here also.

 

JTGrant

New Member

Aug 2, 2005

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GA

Mar 1, 2006

#6

• Mar 1, 2006

• #6

I would either go with 4.10 or 3.73. Make sure you use Ford Racing gears.

http://www.buckeyetriumphs.org/technical/Calculator/road_speed_vs_engine_speed_calcu.htm

Go to that site and download:


"Click here to download the Calculator Microsoft Excel Workbook"


Then enter your tire size, wheel size, trans gear ratios, and final gear ratio and it will give a accurate read out of mph to rpm.

 

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06GTVERT4DE

New Member

Dec 28, 2005

41

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Mar 1, 2006

#7

• Mar 1, 2006

• #7

gpp said:

does the same for the 06 as your 98.i put ford 3.73 in my 06 automatic and made a huge differance.turns about 2100 rpm at 60 in overdrive.do it,you will be glad you did.

Click to expand...

Sweet! Gotta find a way to get the approval from my wife! LOL!

 

D

discofan

Member

Apr 21, 2005

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Mar 1, 2006

#8

• Mar 1, 2006

• #8

svttech76 said:

i agree with these guys about gears but if it was my car i would go with 4.10 or even 4.30's

Click to expand...

Since automatics shift automatically (DUH), installing a 4.10 or 4.30 would make the 1st gear almost non-existent.. If you manually shift your automatic from low to second to third to drive, you can get better benefits from having a 4.10 or 4.30 gear...

I supercharged so I went with the 3.73 gear selection...

Assume, blistering and tire frying exceleration w/ my automatic...

Need to dyno the system so that I get the best results next weekend...

Boys with Toys!!!

Good Luck, Dave