3.90s

[Steve777]

Anyone have 3.90s? I've been hearing about 3.73s vs 4.10s, but not much about the 3.90s they have now. I hear its a good medium between the two -balancing interstate driving and performance, but I was just wondering how much of a difference there would be between the 3.90s and the others. If anyone is using these, let me know what you think and how many rpms you are runnin on the interstate. Thanks

 

[Dark Knight GT]

The RPM difference between 3.73, 3.90, and 4.10 gear ratios are slim and the mpg's will probably be close to the same. I know there are quite a few users on here who use 3.90 gears but I don't know any of them personally. Might want to try a search and see how they like them. Personally, I'de just go with 4.10's if staying n/a and go with 3.73's if I had boost in my future. Just my .02 cents.

 

[BAFMustangGT]

4.10's NO Less on a daily driven 4.6 Mustang...

 

[twogts4us]

Nobody uses the 3.90s because FRPP doesn't make them. Only buy FRPP gears!

 

[BAFMustangGT]

^^^

And because 4.10s NO LESS

 

[NewStangNewbee]

Are 3.55's to high to have on my car cuZ I am thinking about changing. I have a 4-speed auto. Would I be shifting at a weird time?

 

[BAFMustangGT]

4.10's

On a 96 (which are turds), you do NOT want to go ANY lower than what you have and i would suggest 4.10s. You also would want some PI stuff which you seem to be interested in which is good. With PI, Gears, and some DR's, you should be in the high 13's

 

[NewStangNewbee]

Yeah I am going to be doing the full swap in hopefully a couple of weeks

 

[NewStangNewbee]

What do you think i will get out of a full swap lt's and x-pipes?

 

[Go HoTO!]

3.90's were a smart advertising gimmick...go 4.10's FRPPs!

 

[Modular2v]

somebody post the sign that reads like this

NO LESS THAN
4.10s
IN A DAILY
DRIVEN GT

signed: those who know!

 

[BAFMustangGT]

^^^
Along with...

"DO NOT FEAR, THE GEAR!"

 

[NewStangNewbee]

So you think move up to 4.10's? WHat improvement over stock 2.73's do you think there will be?

 

[BAFMustangGT]

Oh christ dude...you will **** your pants. I say atleast a .5 diff in the 1/4. The gears (And no PI) is what KILLED, and i mean KILLED the 96 - 98. You need gears...

 

[NewStangNewbee]

well i have 373 i was just wonderin

 

[Modular2v]

3.73s in a non PI really doesnt that much! i had them in my 98gt and continually tried to kick myself in the @ss for not getting 4.10s!!!

 

[BAFMustangGT]

^^^ No less than 4.10s...ever...

 

[NewStangNewbee]

Well i can change them I changed the 273's It just was kinda a biotch to do

 

[BAFMustangGT]

Well i can change them I changed the 273's It just was kinda a biotch to do

Yea, if you go to the track, you really should change them.

 

[NewStangNewbee]

ok i will check yee ole ebay!