Gear Swap

96Saleen · 07-17-2002, 11:50 AM

Hi Guys,

I have a 2002 GT and I'm thinking about changing the gear. It has a 3.27 now. I'm thinking about installing a 3.73.

First, is that a good choice?
Second, would I have to get my PCM reflashed (car has a digitial odometer)? My brother said I will have to. If that's the case, what kind of shop would do something like that?

Thanks,
- Mike

blue00gt · 07-17-2002, 12:51 PM

Your choice of gear depends on what tranny you have and what kind of driving you mostly do. If it's an auto, I'd say go with 4.10s. If it's a stick then the choice between 3.73s and 4.10s mainly depends on how much freeway driving you do and if you mind losing the extra 1 mpg or so with 4.10s compared to 3.73s. If you plan on adding a power adder go with 3.73s or you will run out of 4th gear in the 1/4.

Badass_yellowGT · 07-19-2002, 03:15 PM

i would recomend 3.90 gears it`s right in betwwen the 3.73 and 4.10 more torque duplication and relativly good rpms on the highway that you would not get with the 4.10`s

o yeah and you will have to have the your car re flashed any dealer can do it.

blue00gt · 07-19-2002, 04:04 PM

If you don't want to reflash there is also an animal called the SpeedCal:
http://www.dallasmustang.com/speedcal_about.htm

blue00gt · 07-19-2002, 04:06 PM

As far as 3.90 gears go, who makes them and does anyone have experience with these? I had heard from some folks that it is best to stick with genuine Ford gears to avoid problems, but Ford doesn't make anything in between 3.73 and 4.10.

Badass_yellowGT · 07-19-2002, 04:20 PM

heres the best palce to buy themPro 5.0 gears
Promotive

o2superstang · 07-20-2002, 12:18 AM

Just finished installing 4.10's in my 00 GT. The "Speed Cal" installation was a breeze. My recommendation would be the 4.10's, RPM at 70 mph is about 2500, not bad for cruising down he highway. The bottom end 10 times better, the 1 - 2 powershift is the funnest!!!

07-17-2002, 11:50 AM	#1
96Saleen Registered Member Join Date: Aug 2001 Location: Mt. Clemens, MI, USA Posts: 19	Gear Swap Hi Guys, I have a 2002 GT and I'm thinking about changing the gear. It has a 3.27 now. I'm thinking about installing a 3.73. First, is that a good choice? Second, would I have to get my PCM reflashed (car has a digitial odometer)? My brother said I will have to. If that's the case, what kind of shop would do something like that? Thanks, - Mike __________________ 2002 Black Mustang GT - Cold Fusion Wet Nitrous System (75 shot) - K&N Air Filter - Cold Air Intake - Saleen Springs - Steeda Tri-Ax Shifter - 3.73 gear - BBK Long-tube headers - Dr. Gas Off-road X-pipe - Borla Exhaust - Saleen lower control arms - Saleen underdrive pulleys Best 1/4 (w/o NOS): 13.68 @ 102mph Best 1/4 (w/NOS): 12.93 @ 108mph

07-17-2002, 12:51 PM	#2
blue00gt Mustang Addict Join Date: Jan 2001 Location: McKinney, TX Posts: 1,294	Your choice of gear depends on what tranny you have and what kind of driving you mostly do. If it's an auto, I'd say go with 4.10s. If it's a stick then the choice between 3.73s and 4.10s mainly depends on how much freeway driving you do and if you mind losing the extra 1 mpg or so with 4.10s compared to 3.73s. If you plan on adding a power adder go with 3.73s or you will run out of 4th gear in the 1/4. __________________ Strike down the unroadworthy! 2000 GT Atl. Blue: '03 Cobra motor - 465rwhp/473rwtq, T-56 6-speed, full MM TA/PH & tubular K-member suspension, Saleen body, 17" Torq-Thrust II's, M/T ET Street radials, and lots more '94 Rio Red Cobra: All the bolt-ons, 3.73s

07-19-2002, 03:15 PM	#3
Badass_yellowGT Registered Member Join Date: Jun 2002 Location: Western,MA Posts: 254	i would recomend 3.90 gears it`s right in betwwen the 3.73 and 4.10 more torque duplication and relativly good rpms on the highway that you would not get with the 4.10`s o yeah and you will have to have the your car re flashed any dealer can do it. __________________ Rice Haters Club Member #55 For My car Specs Click the Home page link http://www.badassyellowgt.50g.com/

07-19-2002, 04:04 PM	#4
blue00gt Mustang Addict Join Date: Jan 2001 Location: McKinney, TX Posts: 1,294	If you don't want to reflash there is also an animal called the SpeedCal: http://www.dallasmustang.com/speedcal_about.htm __________________ Strike down the unroadworthy! 2000 GT Atl. Blue: '03 Cobra motor - 465rwhp/473rwtq, T-56 6-speed, full MM TA/PH & tubular K-member suspension, Saleen body, 17" Torq-Thrust II's, M/T ET Street radials, and lots more '94 Rio Red Cobra: All the bolt-ons, 3.73s

07-19-2002, 04:06 PM	#5
blue00gt Mustang Addict Join Date: Jan 2001 Location: McKinney, TX Posts: 1,294	As far as 3.90 gears go, who makes them and does anyone have experience with these? I had heard from some folks that it is best to stick with genuine Ford gears to avoid problems, but Ford doesn't make anything in between 3.73 and 4.10. __________________ Strike down the unroadworthy! 2000 GT Atl. Blue: '03 Cobra motor - 465rwhp/473rwtq, T-56 6-speed, full MM TA/PH & tubular K-member suspension, Saleen body, 17" Torq-Thrust II's, M/T ET Street radials, and lots more '94 Rio Red Cobra: All the bolt-ons, 3.73s

07-19-2002, 04:20 PM	#6
Badass_yellowGT Registered Member Join Date: Jun 2002 Location: Western,MA Posts: 254	heres the best palce to buy themPro 5.0 gears Promotive __________________ Rice Haters Club Member #55 For My car Specs Click the Home page link http://www.badassyellowgt.50g.com/ Last edited by Badass_yellowGT; 07-19-2002 at 10:29 PM..

07-20-2002, 12:18 AM	#7
o2superstang Registered Member Join Date: May 2002 Posts: 24	Just finished installing 4.10's in my 00 GT. The "Speed Cal" installation was a breeze. My recommendation would be the 4.10's, RPM at 70 mph is about 2500, not bad for cruising down he highway. The bottom end 10 times better, the 1 - 2 powershift is the funnest!!!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
1996 Gt Auto To Auto Swap Now It Won't Run In Gear.	the69dr	Modular Madness	1	10-27-2003 08:54 AM
Serious problem after gear swap.......	1bad89lx	Windsor Power	2	03-11-2003 01:00 AM
Gear swap instructions?	GodStang	Windsor Power	2	08-14-2002 05:19 AM
Need help please.... Doing gear swap	90'5.0 Conv	Windsor Power	19	04-28-2002 05:07 PM
Engine Swap & gear change	LABARINTH	Modular Madness	1	03-12-2002 03:41 PM