3.55's or 3.73's?

blk88lx · 03-03-2002, 11:20 PM

Hi all,

I know this is an age old question but what one should I go with? I wasn't going to put gears in it but I posted a while ago as to wether or not I could beat a F350 Diesel truck w/my 93 GT and the reaction was mixed. Found a good mechanic that will help me do it so I'm going to go for it. Most people go with the 3.55's but I got a buddy who swears the 3.73's are uch better. I have 3.08's now.

Any opinioins?

Jayson

1BAD89 · 03-03-2002, 11:33 PM

Go with the 3:73's, the highway rpm is just a little higher than 3:55's, not much at all though. I went with 3:55's on my 89 GT when I had a few mod's, and if I would've went with 3:73's I would have been running high 13's, instead of low 14's. With the 3:55's, I had to shift into 4th right before the traps....3:73's get my vote.

lx mike · 03-04-2002, 07:14 AM

go with the 3.73 and a good tire and that truck will be seeing your taillights. i have 3.73 and drive mine daily and luv them, on the highy way i run around 70-75 and engine is around 2200-2300 rpm and i get around 25 mpg. people go with 3.55 cause they are thinking about gas mileage along with performance.

blk88lx · 03-04-2002, 08:53 AM

OK,
sounds like 3.73's it is.

Thanks for the advice!

Jayson

DemonGT · 03-04-2002, 02:29 PM

from what iv heard and read if your staying N/A 3.73' are the better choice but in a blown application 3.55's are better?

Mr 5 0 · 03-05-2002, 02:18 PM

Quote:

Originally posted by DemonGT

from what iv heard and read if your staying N/A 3.73' are the better choice but in a blown application 3.55's are better?

That's generally true.

Once you get well over 300 HP you no longer need as much torque multiplication and if you're driving a street car with street tires, the 3.73's can be overkill - but most people run them anyway as it's the gear ratio that seems to pull the best overall results from a Mustang V-8.

Your performance may vary.

kiku2sleep · 03-05-2002, 03:24 PM

I have been thinking about gears myself. Do you guys recommend the same for a car with an automatic?

RED92LX50 · 03-05-2002, 04:51 PM

I will dare to be different...I just got 4.10's in my 92LX Vert 5spd (from 3.08's), and THEY ARE AWESOME...I don't do much extended HWY driving, and around town I always seem to be in the right gear - instead of either lugging in a gear, or waiting forever for a gear to wind out.

I was one of the ones 'on the fence' 3.73 -vs- 4.10, and for the $ I spent to have it done I belive I would have been somewhat dissapointed if I went with 3.73.

Just my thoughts, it all really depends on how/when you drive your car.

03-03-2002, 11:20 PM	#1
blk88lx Registered Member Join Date: Jun 2001 Location: Fort Leonard Wood, MO Posts: 179	3.55's or 3.73's? Hi all, I know this is an age old question but what one should I go with? I wasn't going to put gears in it but I posted a while ago as to wether or not I could beat a F350 Diesel truck w/my 93 GT and the reaction was mixed. Found a good mechanic that will help me do it so I'm going to go for it. Most people go with the 3.55's but I got a buddy who swears the 3.73's are uch better. I have 3.08's now. Any opinioins? Jayson

03-04-2002, 07:14 AM	#3
lx mike Undescribable Join Date: Sep 1998 Location: Ft Myers Fla Posts: 1,539	go with the 3.73 and a good tire and that truck will be seeing your taillights. i have 3.73 and drive mine daily and luv them, on the highy way i run around 70-75 and engine is around 2200-2300 rpm and i get around 25 mpg. people go with 3.55 cause they are thinking about gas mileage along with performance. __________________ Rice Haters Club Member #101

03-04-2002, 02:29 PM	#5
DemonGT Registered Member Join Date: Aug 2000 Location: Wisconsin Posts: 879	from what iv heard and read if your staying N/A 3.73' are the better choice but in a blown application 3.55's are better? __________________ '91 GT,410W,10.5 to 1 comp,Victor Jr. heads,Victor 5.8 intake,FTI cam,Crane retro fit lifters,Scorpian 1.6 RR's,Melling HV oil pump,MSD distro.,Canton oil pan,FMS flywheel,Romac balancer,FMS timing chain,Accufab 90mm TB,C&L 76mm maf, 42lbers,HD clutch,K&N air filter,Mac long tubes,Pro dumps,powerchamber,FMS 9mm wires,180 thermostat,Ford Racing gauges,5inch Tach,centerline convo pro's,nitto DR's,Pro3i lower control arms,50/50 shocks,3.55 gears,TFS HD diff. cover Next year: Tremec TKO,Spec stage 3 clutch,alum driveshaft,complete fuel system www.angelfire.com/linux/demondan

03-05-2002, 03:24 PM	#7
kiku2sleep Registered Member Join Date: Aug 2001 Location: Gaza Strip, Southwestern Asia Posts: 77	I have been thinking about gears myself. Do you guys recommend the same for a car with an automatic? __________________ 92 LX 5.0-Green W/white top, guts, and rims. 01 gixxer 600 (team colors)

03-05-2002, 04:51 PM	#8
RED92LX50 Registered Member Join Date: Aug 1999 Location: Fairfax, VA Posts: 220	I will dare to be different...I just got 4.10's in my 92LX Vert 5spd (from 3.08's), and THEY ARE AWESOME...I don't do much extended HWY driving, and around town I always seem to be in the right gear - instead of either lugging in a gear, or waiting forever for a gear to wind out. I was one of the ones 'on the fence' 3.73 -vs- 4.10, and for the $ I spent to have it done I belive I would have been somewhat dissapointed if I went with 3.73. Just my thoughts, it all really depends on how/when you drive your car. __________________ 1992 LX 5.0 Convertible Red/Blk Gears, Exhaust, bolt-ons... R.H.C. #51

03-03-2002, 11:33 PM	#2
1BAD89 Tubbed and Juiced Join Date: Mar 2001 Location: Tulsa, Oklahoma Posts: 1,861	Go with the 3:73's, the highway rpm is just a little higher than 3:55's, not much at all though. I went with 3:55's on my 89 GT when I had a few mod's, and if I would've went with 3:73's I would have been running high 13's, instead of low 14's. With the 3:55's, I had to shift into 4th right before the traps....3:73's get my vote.

03-04-2002, 08:53 AM	#4
blk88lx Registered Member Join Date: Jun 2001 Location: Fort Leonard Wood, MO Posts: 179	OK, sounds like 3.73's it is. Thanks for the advice! Jayson

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
First Race with 3.73's	95mustanggt	Stang Stories	10	01-31-2002 02:16 AM
New "pathetic" track times after 3.73's !!HELP!!	Dark_5.0	Stang Stories	32	08-10-2001 09:18 PM
97 Snake: 3.55's or 3.73's?	00'BlackSteed	Modular Madness	10	06-03-2001 12:32 PM
3.55's, 3.73's Or 4.10's???	BowTie Eater 5 Liter	Windsor Power	43	03-26-2001 09:41 PM
3.55's or 3.73's?	BowTie Eater 5 Liter	Windsor Power	3	01-29-2001 03:19 AM