Ive tried the searching , but mostly found useless threads like, SRT-4 waxes 2005? and stuff like that. And alot in the other forums. I wanted to get higher gears, but im wondering what the RPMs are. Im mostly concerned about 80 MPH because that is the speed i go on the freeway. I do not want to burn up alot of gas if its going to be around 3500 RPM. Currently its at 2250-2500. Since it takes 35-40 dollars a tank, and me filling up once every week, thats alot of gas.
4.10 gears
- Thread starter hurdlinmasta
- Start date
At 80 MPH in 5th gear, your just a hair over 2700 RPMs vs. about 2400 with stock 2.55s. I checked mileage under the following conditions: mostly in-town, some highway, air conditioner on about 40% of the time. I'm not light-footed and got 19 MPG with 93 octane. Check my signature for mods. I have a 5-speed manual tranny. IMO 4.10s are a great improvement - well worth the investment. It's like a different animal now - quick throttle response to the wheels in every gear. Hope this helps!
http://www.f-body.org/gears/
GT Five-speed manual (Tremec 3650)
1st: 3.34
2nd: 2.00
3rd: 1.32
4th: 1.00
5th: 0.68
GT Five-speed manual (Tremec 3650)
1st: 3.34
2nd: 2.00
3rd: 1.32
4th: 1.00
5th: 0.68
Go here:
http://forums.stangnet.com/showthread.php?t=521948
and take a look for yourself. Hope that helps.
http://forums.stangnet.com/showthread.php?t=521948
and take a look for yourself. Hope that helps.
dpjedi
Founding Member
Evil Sephiroth
New Member
They say Stock vs Stock a
2005GT Vs SRT-4 is a drivers race, but with the same driver the 2005GT is gonna win every time
2005GT Vs SRT-4 is a drivers race, but with the same driver the 2005GT is gonna win every time
depends. i think you'd have alot of traction problems. with forced induction, I'd say 3.73's would be optimal, but really it's all what feels best for you. traction, on a daily basis, let alone at the track, would be reduced greatly with 4.10's. Go 4.10's if you're getting some good rubber. With normal tires, I'd say no way.
jrs307
New Member
So how would the 4:10's work on an automatic. (Im not very mechanically inclined.) Is a reflash of the computer necesary.
Tmack
New Member
For an automatic Ford Racing recommends 3.75 gears. It wouldn’t hurt to have a tune but it is not necessary if you are only changing out the gears. Re-flashing the computer is only needed when changing the exhaust and or induction.jrs307 said:
you do need to calibrate your speedo with a tuner. one guy is having problems with ford and his 4.10s. they claim the gears ruin the engine calibration, as it is calibrated for stock gears. i think it is 
, but just beware.
4.10s would be fine with an automatic, and many have done it.
you need to find a local high performance shop, or a good mechanic to do the gear install.
, but just beware.4.10s would be fine with an automatic, and many have done it.
you need to find a local high performance shop, or a good mechanic to do the gear install.
i have been looking into 4.10 gears and i got a price of $525 installed for everything(price of $1300.00 from the dealership). That price seemed pretty fair to me. The guy who is doing it was a ford mechanic and they use ford parts. I was told by them that with a Xcal2 tune that i already have that the tune will adjust to the new gears. Anyone have an experience with that?
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