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Discussing 3.90 Gears in the Modular Mustangs Forum. Does anyone have Motive 3.90 gears? I never could decide between 3.73's ... Modded Mustangs is the premier Ford Mustang Forum on the internet. We discuss all aspects of the Ford Mustang on the forum. Registered Users do not see the above ads. Please Register - It's Free! |
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#1 |
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Enthusiast
2003 Mustang V6
15.96@87.08
Join Date: Dec 2006
Location: East Tennessee
Posts: 688
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3.90 Gears
Does anyone have Motive 3.90 gears? I never could decide between 3.73's and 4.10's since I have a manual and 3.90 is like right in the middle but I dont know anyone who has them....This would be for the GT i'm getting ready to buy not my V6..
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#2 |
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Enthusiast
2000 Mustang GT
14.211 @ 93.0...4200 ft above sea level
Join Date: Oct 2007
Location: El Paso, TX
Posts: 576
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i'm interested in this as well...also what about to add for a car that will eventually P-1sc(?) only running about 9-10 lbs of boost?...but be n/a for a year or more before than
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2000 Mustang GT 4.10's, Hoosier DR's (stock intake, stock exhaust)...nitrous kit awaiting install |
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#3 | ||
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From the land of the wolverines
1986 Mustang GT
Join Date: Apr 2007
Location: Smothering v606er with a plastic walmart bag
Posts: 7,277
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3.90's are a good gear the reason people dont run them on here is because it is not a ratio Ford Racing offers. Buy them and tell us what you think.
And the guy running the boost I would go 3.73's
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#4 |
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Hardcore Enthusiast
2002 Chevrolet Impala
???
Join Date: Jul 2007
Location: Englewood, Colorado
Posts: 2,193
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3.90s are gonna be a bit too short for 9-10 psi, but if you ever wanna dial up the boost, you're really gonna wish you had gotten some 3.73sI have a buddy who has 4.10s and 12 psi with a whipple... it's a little overwhelming to say the least. |
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#5 |
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Banned
2002 Mustang GT
Join Date: Dec 2006
Location: Nashville, TN
Posts: 170
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if you're running an n/a car...go with the 4.10's...the 3.90's there's virtually no difference between the two.
there's virtually no noticeable difference between the 3.73's and the 3.90's either if you're running a FI car, then 3.73's is the way to go. and you're only gonna lose 1 - 2 mpg overall for the 3.73's, 3.90's, or the 4.10's |
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#6 |
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Regular
Y2K GT
13.3@103
Join Date: Mar 2007
Location: Ada Oklahoma
Posts: 350
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They all say theres no difference between the gears but just that little bit of difference is what makes the difference. I have 3.90s and my buddy has 4.10s hee cant hook very well with just street tires but i can prolly b/c of the little difference thats there between the two gear ratios.
also dont let us decide what gear for you to get remeber its your car you are the one who has to drive it not us get what u want.
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