Which gear ratio?

J114 · 02-08-2005, 11:13 PM

Hi guys,
I am having trouble deciding on which gear ratio to go with. I am
thinking of going with 3.55 or 3.73's. Any advice would be appreciated.

Beavis · 02-09-2005, 04:24 PM

3.73, good for road and freeway. anything higher then 373 i hear will keep your car more accelerated and can over heat your car more in the highway. so i would say 373.

cotton90gt · 02-09-2005, 04:29 PM

yeah go with the 373's bro

chrisallen · 02-09-2005, 11:31 PM

Yep, I was partial to the 3.73's also.

82 GT · 02-09-2005, 11:45 PM

Quote:

Originally Posted by Beavis

anything higher then 373 i hear will keep your car more accelerated and can over heat your car more in the highway. so i would say 373.

If your cooling system is up to par, you should never have to worry about overheating no matter what gears you have.
Most people go with 3:73's for a 5 speed and 4:10's for AOD's
I don't recommend 4:10's if you have a C-4 and drive it on the street....like I do.

J114 · 02-10-2005, 10:12 PM

thank for the input guys

302stang · 02-15-2005, 10:07 PM

i don't know i had 3.73 but wasn't a fan the starts sucked it seemed like as soon as u took for foot of the clutch you had to shift to 2 id say 3.55

fiveohpatrol · 02-19-2005, 05:52 PM

it depends on what you have.
Overheating from keeping it accelerated? Thats not a very intelligent statement. First of all, it will be at a higher RPM when cruising, so what? Keeping it more accelerated doesn't even make sense.

If you want to know which gear to go with, without any other info on your car, or what you will be doing with it, then keep the stock 2.73's or 3.08's in there.

I could recommend 3.55's if you're planning on running a C4, 30psi of boost, 28" slicks, and 135+mph trap speeds.
OR I could recommend 4.56 gears if you're a high revving NA 306.

The answer is "it depends"

Fat0eknee · 02-19-2005, 06:02 PM

Quote:

Originally Posted by 82 GT

Most people go with 3:73's for a 5 speed and 4:10's for AOD's

I agree with 82 GT

Zack87GT · 02-19-2005, 06:57 PM

Go with 3.73's.. you will feel a huge difference.. it will be fun to drive!!

Mustang Brandon · 02-20-2005, 08:38 PM

if you drive on the highway get the 3.55's

RBatson · 02-20-2005, 08:47 PM

What year is the car, what have you done to it, and what transmission does it have? Also, what are your intentions with the car? Is it a daily driver?

warlock 92 · 03-17-2007, 11:07 PM

can someone help me out? I just bought a 93 Cobra the pervious owner changed the rear end from a 3:08 to 3:73. The car runs great but my speedo is way off. What do I need to do to make it right?

J114 · 03-18-2007, 11:28 AM

Warlock92, you need to change your speedo driven gear on the end of your speedo cable where it meets the transmission. You will have to see if an aftermarket company offers a replacement gear for your gear ratio. According to some literature I have, Saleen Performance Parts offers a 23 tooth gear for a 93 cobra with 3.55 gears, but not sure if they make one for your 3.73's. Worst case scenario you may have to change your speedo drive gear by partially dis-assembling the transmission. Hopefully there is a driven gear available for your set up.

USMC302 · 03-21-2007, 11:57 AM

http://www.uprproducts.com/shopping/shopexd.asp?id=395

Installation is easy, one bolts and a couple lock pins later your done. Good luck.

USMC302 · 03-21-2007, 12:03 PM

http://www.uprproducts.com/shopping/shopexd.asp?id=395

Installation is easy, one bolts and a couple lock pins later your done. Good luck.

02-08-2005, 11:13 PM	#1
J114 Registered Member Join Date: Aug 2003 Location: Airdrie, Alberta - Canada Posts: 28	Which gear ratio? Hi guys, I am having trouble deciding on which gear ratio to go with. I am thinking of going with 3.55 or 3.73's. Any advice would be appreciated.

02-09-2005, 04:24 PM	#2
Beavis Registered Member Join Date: Dec 2001 Location: California Posts: 68	Re: Which gear ratio? 3.73, good for road and freeway. anything higher then 373 i hear will keep your car more accelerated and can over heat your car more in the highway. so i would say 373. __________________ 92 LX Coupe 5.0- under construction 89 GT 5.0- wrecked on 7/03 3.08 gears, Saleen Suspension, MSD Ignition, Underdrive pulleys, Flowmaster force II Cat-Back exhuast, Flex-a-Lite Black Magic Elec. Fan.

02-09-2005, 04:29 PM	#3
cotton90gt Registered Member Join Date: Feb 2005 Posts: 3	Re: Which gear ratio? yeah go with the 373's bro

02-09-2005, 11:31 PM	#4
chrisallen Registered Member Join Date: Feb 2005 Posts: 17	Re: Which gear ratio? Yep, I was partial to the 3.73's also.

02-10-2005, 10:12 PM	#6
J114 Registered Member Join Date: Aug 2003 Location: Airdrie, Alberta - Canada Posts: 28	Re: Which gear ratio? thank for the input guys

02-15-2005, 10:07 PM	#7
302stang Registered Member Join Date: Nov 2004 Posts: 10	Re: Which gear ratio? i don't know i had 3.73 but wasn't a fan the starts sucked it seemed like as soon as u took for foot of the clutch you had to shift to 2 id say 3.55

02-19-2005, 05:52 PM	#8
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	Re: Which gear ratio? it depends on what you have. Overheating from keeping it accelerated? Thats not a very intelligent statement. First of all, it will be at a higher RPM when cruising, so what? Keeping it more accelerated doesn't even make sense. If you want to know which gear to go with, without any other info on your car, or what you will be doing with it, then keep the stock 2.73's or 3.08's in there. I could recommend 3.55's if you're planning on running a C4, 30psi of boost, 28" slicks, and 135+mph trap speeds. OR I could recommend 4.56 gears if you're a high revving NA 306. The answer is "it depends" __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

02-19-2005, 06:57 PM	#10
Zack87GT Registered Member Join Date: Jan 2005 Posts: 33	Re: Which gear ratio? Go with 3.73's.. you will feel a huge difference.. it will be fun to drive!!

02-20-2005, 08:38 PM	#11
Mustang Brandon Registered Member Join Date: Feb 2004 Location: louisville, kentucky Posts: 88	Re: Which gear ratio? if you drive on the highway get the 3.55's __________________ black 89 lx hatchback 5.0, 17x9 polished Cobra R's wrapped in 215/50/17 up front and 245/40/17 out back , perfectly clean and original interior less than 1,000 miles on new t-5, throw out bearing and clutch. completly redone exaust shorty headers, custom h pipe, flowmaster 40 series, all mandrell bent 2.5 inch tubing i got all new headlight assembly for christmas with clear corners www.50resto.com

02-20-2005, 08:47 PM	#12
RBatson Registered Member Join Date: May 1997 Posts: 3,028	Re: Which gear ratio? What year is the car, what have you done to it, and what transmission does it have? Also, what are your intentions with the car? Is it a daily driver? __________________ Tis better to be hated for what you are than loved for what you are not.

03-17-2007, 11:07 PM	#13
warlock 92 Registered Member Join Date: Mar 2007 Posts: 4	Re: Which gear ratio? can someone help me out? I just bought a 93 Cobra the pervious owner changed the rear end from a 3:08 to 3:73. The car runs great but my speedo is way off. What do I need to do to make it right? __________________

03-18-2007, 11:28 AM	#14
J114 Registered Member Join Date: Aug 2003 Location: Airdrie, Alberta - Canada Posts: 28	Re: Which gear ratio? Warlock92, you need to change your speedo driven gear on the end of your speedo cable where it meets the transmission. You will have to see if an aftermarket company offers a replacement gear for your gear ratio. According to some literature I have, Saleen Performance Parts offers a 23 tooth gear for a 93 cobra with 3.55 gears, but not sure if they make one for your 3.73's. Worst case scenario you may have to change your speedo drive gear by partially dis-assembling the transmission. Hopefully there is a driven gear available for your set up.

03-21-2007, 11:57 AM	#15
USMC302 Registered Member Join Date: Apr 2001 Location: Gallatin, Tn Posts: 1,326	Re: Which gear ratio? http://www.uprproducts.com/shopping/shopexd.asp?id=395 Installation is easy, one bolts and a couple lock pins later your done. Good luck. __________________

03-21-2007, 12:03 PM	#16
USMC302 Registered Member Join Date: Apr 2001 Location: Gallatin, Tn Posts: 1,326	Re: Which gear ratio? http://www.uprproducts.com/shopping/shopexd.asp?id=395 Installation is easy, one bolts and a couple lock pins later your done. Good luck. __________________

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