Rear Gear Noob Question

ssdell3 · September 28th, 2007, 11:32 PM

I bought my 99 GT used and I suspect that the previous owner had some minor mods. Here's the question: If while in 4th gear at 60mph, and I'm at 26-2700 rpm, what size rear gear would that be. 17 inch rims all around. Also, what is the best tuner in the $300 range to remove the 125mph limit, that's killing me.

tlr96 · September 28th, 2007, 11:39 PM

according to this http://www.corral.net/tech/gearcalc.html you have 3:31s. and sct for the tuner.

G.T. Rags · September 28th, 2007, 11:44 PM

Originally Posted by tlr96

according to this http://www.corral.net/tech/gearcalc.html you have 3:31s. and sct for the tuner.

....

u got stock gears still.....3.27FTL

ssdell3 · September 28th, 2007, 11:51 PM

Thanks. Do you have a particular model of SCT in mind? Will I have to also cgange the tune once I change the gears to 3.73? Sorry about all the questions. All of my friends love Chevy, so I don't take their advice, lol.

G.T. Rags · September 28th, 2007, 11:57 PM

SCT Xcal 3 dude....

and evertime u get a new mod u can adjust the tune accordingly with the tuner

ssdell3 · September 28th, 2007, 11:59 PM

thanks

Eagle2000GT · September 29th, 2007, 12:03 AM

Welcome to the club... and you cannot trust the speedometer, tach readings.

I bought a used Mustang. The previous owner had obviously programmed it for the 3.73 gears he had installed, but in his urgency to get rid of the car her forgot to program it back. That and other things.

I had thought that I had stock gears --3.27:1. That was exactly what the computer told my gages to display. That is exactly what I saw on the instrument panel. And it was wrong. I actually have 3.73:1 gears.

Eagle2000GT · September 29th, 2007, 12:05 AM

sorry, double tap. Don't you really hate dial up.

ssdell3 · September 29th, 2007, 12:14 AM

I had a feeling that my tach might be off, but I'm not sure. The reason why all this is so important is that I don't want to prchase something I already have. I've driven other "stock" 99 and 2000 mustangs, but mine seems to have more power. I've also let others drive it for a second opinion, and they said mine seemed stronger. So I'm assuming that I need to get an external tach first. Would the SunPro at Autozone or Pepboys be sufficient or what do you recommend?

Fryrice · September 29th, 2007, 01:32 AM

Originally Posted by 96GTRagTop

Originally Posted by tlr96

according to this http://www.corral.net/tech/gearcalc.html you have 3:31s. and sct for the tuner.

....

u got stock gears still.....3.27FTL

Ah the good ol days,lol.

September 28th, 2007, 11:32 PM	#1
ssdell3 Newbie Join Date: Apr 2007 Posts: 21 iTrader: 0 reviews	Rear Gear Noob Question I bought my 99 GT used and I suspect that the previous owner had some minor mods. Here's the question: If while in 4th gear at 60mph, and I'm at 26-2700 rpm, what size rear gear would that be. 17 inch rims all around. Also, what is the best tuner in the $300 range to remove the 125mph limit, that's killing me. __________________ Thank the stupid people, they make us the smart people.

September 28th, 2007, 11:39 PM	#2
tlr96 Hardcore Enthusiast 1996 Mustang GT Join Date: Mar 2007 Location: Effingham, IL Posts: 1,795 iTrader: 0 reviews	according to this http://www.corral.net/tech/gearcalc.html you have 3:31s. and sct for the tuner. __________________ view my garage for pics and modifications listen to my exhaust video 1 video 2 video 3

September 28th, 2007, 11:51 PM	#4
ssdell3 Newbie Join Date: Apr 2007 Posts: 21 iTrader: 0 reviews	Thanks. Do you have a particular model of SCT in mind? Will I have to also cgange the tune once I change the gears to 3.73? Sorry about all the questions. All of my friends love Chevy, so I don't take their advice, lol. __________________ Thank the stupid people, they make us the smart people.

September 28th, 2007, 11:59 PM	#6
ssdell3 Newbie Join Date: Apr 2007 Posts: 21 iTrader: 0 reviews	thanks __________________ Thank the stupid people, they make us the smart people.

September 29th, 2007, 12:03 AM	#7
Eagle2000GT I Post Entirely Way Too Much 2000 Mustang GT 12.73@111.36 Join Date: Aug 2007 Location: Shelbyville, IN Posts: 5,311 iTrader: 1 reviews	Welcome to the club... and you cannot trust the speedometer, tach readings. I bought a used Mustang. The previous owner had obviously programmed it for the 3.73 gears he had installed, but in his urgency to get rid of the car her forgot to program it back. That and other things. I had thought that I had stock gears --3.27:1. That was exactly what the computer told my gages to display. That is exactly what I saw on the instrument panel. And it was wrong. I actually have 3.73:1 gears. __________________ ProCharger P-1SC, 9 psi, STD 396/383; Uncorrected 388/375; SAE 383/370 Mods list in Garage.

September 29th, 2007, 12:05 AM	#8
Eagle2000GT I Post Entirely Way Too Much 2000 Mustang GT 12.73@111.36 Join Date: Aug 2007 Location: Shelbyville, IN Posts: 5,311 iTrader: 1 reviews	sorry, double tap. Don't you really hate dial up. __________________ ProCharger P-1SC, 9 psi, STD 396/383; Uncorrected 388/375; SAE 383/370 Mods list in Garage.

September 29th, 2007, 12:14 AM	#9
ssdell3 Newbie Join Date: Apr 2007 Posts: 21 iTrader: 0 reviews	I had a feeling that my tach might be off, but I'm not sure. The reason why all this is so important is that I don't want to prchase something I already have. I've driven other "stock" 99 and 2000 mustangs, but mine seems to have more power. I've also let others drive it for a second opinion, and they said mine seemed stronger. So I'm assuming that I need to get an external tach first. Would the SunPro at Autozone or Pepboys be sufficient or what do you recommend? __________________ Thank the stupid people, they make us the smart people.

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