3.73 Gears installed. I have a few questions?

[KHvistagt]

I had 3.73 Gears installed in my 08 manual trans. GT at my Ford dealer and they told me the speedo would be off a little becuase they could not flash the computer for 3.73s. They did flash it to 3.55 from the factory 3.31 gears so I guess thats better than not flashing it at all.

Do any of you know how much the speedo will be off by? If the speedo reads 70mph., How fast will the actual speed be? Will actual speed be slower or faster than what the speedometer reads?

Is my only option to correct the speedo to purchase a handheld tuner such as a Diablo or SCT? I see Brenspeed and BamaChips sell them both individually and also packaged with CAI. Is it worth the extra $200 or so to get it with the CAI?

 

[matt07gt]

I would go with the package deal from Breenspeed. I got the SCT/Xcal2 setup last spring and I absolutly love it. Its a completly different car with the tune. Buy it today.....and by the weekend you will be driving around with a woody

 

[RedMOsesSC]

If you dont already have a Cold Air / Tuner combo you have no idea what your missing, 3.73's wake the car up but the CAI/Tuner combo changes the way your Pony behaves in a BIG way, the car will feel MUCH more powerful, it will breath better and the CAI sounds cool! Also, you can recalibrate your speedo.

+1 for Brenspeed tunes!

 

[Jules]

Smartest way I found to to check how off it is is to borrow someones gps. It shows mph so you can see.

 

[SSChris NY.]

Smartest way I found to to check how off it is is to borrow someones gps. It shows mph so you can see.

Agree with this statment, also if U get a hand held go with the Sct, it's what most of the east cost tuners like to use, just a little FYI, what ever you do Good Luck

 

[KHvistagt]

Thanks for your help. I Guess I will have to invest in a CAI and tuner. I'll keep you guys posted as to what I decide to get.

 

[matt07gt]

You wont be dissapointed at all in the investment.

 

[06BeastGT]

MY MAN ... DEF GO WITH THE INTAKE/TUNER COMBO... YOU WILL NOTICE A HUGE DIFFERENCE and with your gears it will be awesome !!! I got the C&L Intake and SCT X3 Tuner with a custom 93 octane tune from BAMACHIPS ... AMAZING!!

 

[RideThePony2004]

would my 2002 auto GT benefit from a tuner? i have a drop in filter and air silencer removed....

 

[Chris2kGT]

You will see minor gains. It is useful though as the tuners work as OBDII code scanners and dataloggers in addition to the ability to hold 3-4 tunes on them.

The 05+ cars really see gains where you and I will not.

 

[RideThePony2004]

ahh that sucks for us....what do we see more gains in?

 

[Ghostly Echo]

I would go with the package deal from Breenspeed. I got the SCT/Xcal2 setup last spring and I absolutly love it. Its a completly different car with the tune. Buy it today.....and by the weekend you will be driving around with a woody

how much was it ?

 

[needforspeed]

I have been looking to do this and have heard the same on the speedometer -

I had put larger tires on mine and with an sct tune - it was still off by about 4 miles per hour - I was searching around and saw this on mustangmagic.com and remebered seeing your post

4. I just put 4.10s in my 1992 Mustang, my speedometer is still reading too fast, even with the 23 tooth speedometer gear, what gives?

These T5 transmissions do not have the correct amount of drive teeth inside the transmission itself. Aftermarket kits such as Autometer carries speedometer kits with adjustments for all ratios.

 

[noclutch]

how much was it ?

For my 06, $659 for the street package and 3 tunes from Brenspeed, took 2 weeks to get it here but worth it . You will have more options to work with and some peace of mind when you start to get into the heavier mods.

I don't know what they have for the 02.