Gears!!

Mustvid · 02-25-2002, 09:53 PM

Okay, I've searched for past discussions on which gears to buy for AOD and the effects on gas mileage. However, I would like to hear from those of you who have an AOD and are running 3:73 or 3:55's. This is for my daily ride and I drive 48 miles round trip to work on the freeway. Want the performance boast but not at the total cost of mpg. Please share your experience with me. By the way, my current gears are 2:73. Thanks!

90'5.0 Conv · 02-25-2002, 10:07 PM

Well, I just bought 4.10 gears for my stang but I don't use it as a daily driver so I see where your coming from. IMHO I've heard of mustangs getting decent gas mileage but usually it's because of having the 2.73's and nothing larger. If I drove that distance to work every day in my stang, I definitely would stay with 2.73's but thats me. You know even 3.55s will still hurt the gas bill pretty good so hope you have lots of gas money, you will need it for sure if you change. Anyways, good luck.

James

1BAD89 · 02-25-2002, 10:43 PM

I know this isn't the same, but I got 23 mpg with 3:55's in my 5-speed.

91GTturbo · 02-26-2002, 02:15 PM

I agree with 1BAD89 on this one. I picked up 2 mpg switching from 2.73 to 3.73. I've personally never seen anyone loose more than a couple mpg, unless they went with a 4.30 or 4.56. You want be disappointed with a 3.73.

7000rpmisheaven · 02-26-2002, 03:16 PM

I hear Honda's get real good gas mileage.

What size tire diameter do you have? You should calculate what your rpm would be at 70mph with 3.55 3.73 and 4.10 gears and then decide for yourself what you think would be best.

joe4speed · 02-26-2002, 05:05 PM

3.73 or 4.10

saleen243 · 02-26-2002, 05:13 PM

3.55 or 3.73. You need to think about your future upgrades. If your going to run a blower 3.55 is the highest I would go!!! 3.73 is safe for just average bolt on power.

Blue Beast · 02-26-2002, 06:10 PM

For an automatic you want either 3.73's or 4.10's just ask the guys at Summit Racing...they'll tell ya. They have it posted at www.summitracing.com under the Customer Service tab. Choose FAQ's and look for "Mustang Modifications....Mild to Wild" it should be on page 3.....5 speed transmissions and automatics are different. Hope this helps...

02-25-2002, 09:53 PM	#1
Mustvid Registered Member Join Date: Feb 2002 Location: Texas Posts: 41	Gears!! Okay, I've searched for past discussions on which gears to buy for AOD and the effects on gas mileage. However, I would like to hear from those of you who have an AOD and are running 3:73 or 3:55's. This is for my daily ride and I drive 48 miles round trip to work on the freeway. Want the performance boast but not at the total cost of mpg. Please share your experience with me. By the way, my current gears are 2:73. Thanks!

02-25-2002, 10:07 PM	#2
90'5.0 Conv Long time member in and out Join Date: Jul 2001 Location: Albany, Ga Posts: 343	Well, I just bought 4.10 gears for my stang but I don't use it as a daily driver so I see where your coming from. IMHO I've heard of mustangs getting decent gas mileage but usually it's because of having the 2.73's and nothing larger. If I drove that distance to work every day in my stang, I definitely would stay with 2.73's but thats me. You know even 3.55s will still hurt the gas bill pretty good so hope you have lots of gas money, you will need it for sure if you change. Anyways, good luck. James __________________ 90' Mustang GT Convertible- C4 w/ manual body 4.10's soon to be 3.27's 2 Ch Flowmasters 1/8th ET 9.04

02-26-2002, 02:15 PM	#4
91GTturbo Registered Member Join Date: May 2001 Location: Valdese, NC Posts: 361	I agree with 1BAD89 on this one. I picked up 2 mpg switching from 2.73 to 3.73. I've personally never seen anyone loose more than a couple mpg, unless they went with a 4.30 or 4.56. You want be disappointed with a 3.73. __________________ 91 single turbo vert

02-26-2002, 03:16 PM	#5
7000rpmisheaven Registered Member Join Date: Nov 2001 Location: germantown MD Posts: 283	I hear Honda's get real good gas mileage. What size tire diameter do you have? You should calculate what your rpm would be at 70mph with 3.55 3.73 and 4.10 gears and then decide for yourself what you think would be best. __________________ 85 GT 4bbl roller cam 2 ch. Flowmasters, O/R H-pipe Performer intake and carb milodon water pump, FMS 9mm wires, aluminum driveshaft, king cobra clutch

02-26-2002, 05:05 PM	#6
joe4speed He said Member...heh, heh Join Date: Sep 1999 Location: Jupiter, Florida U.S.A. Posts: 3,718	3.73 or 4.10 __________________ *Joe!* 1988 GT, 13.58@101mph Check out my listing! Click here! Or my website:www.joe4speed.com

02-25-2002, 10:43 PM	#3
1BAD89 Tubbed and Juiced Join Date: Mar 2001 Location: Tulsa, Oklahoma Posts: 1,861	I know this isn't the same, but I got 23 mpg with 3:55's in my 5-speed.

02-26-2002, 05:13 PM	#7
saleen243 Registered Member Join Date: Aug 2001 Location: VAFB, CA Posts: 47	3.55 or 3.73. You need to think about your future upgrades. If your going to run a blower 3.55 is the highest I would go!!! 3.73 is safe for just average bolt on power. __________________ 2002 F150 SuperCrew 1990 5.0 LX Coupe 1989 Saleen Convertible #243 1965 Fastback - 331 Stroker/T-5 swap

02-26-2002, 06:10 PM	#8
Blue Beast Registered Member Join Date: Jul 2001 Location: New Jersey Posts: 47	For an automatic you want either 3.73's or 4.10's just ask the guys at Summit Racing...they'll tell ya. They have it posted at www.summitracing.com under the Customer Service tab. Choose FAQ's and look for "Mustang Modifications....Mild to Wild" it should be on page 3.....5 speed transmissions and automatics are different. Hope this helps... __________________ Midnight Blue 89 GT... 306... ported and polished aluminum GT40's, MAC Long tubes, MAC power pipe, Flowmaster 2 1/2 cat back, GT40 intake with ported upper and lower, B-Cam, 24lb injectors, 77mm Mass Air, 65mm TB. World Class T5, 3.73's, Centerforce Dual Friction, FRP aluminum radiator, Victor Jr water pump, Pro 5.0 shifter, Crane adjustable FPR, 255lph fuel pump Last edited by Blue Beast; 02-26-2002 at 06:23 PM..

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