3.55, 3.73 or 4.10

Mouse Eater · 01-14-2001, 11:07 PM

Hi i have a friend that just bougth a 1993 5.0 that have 5.000 original miles on it the car looks great and is bone stock , he want´s to put a set of gears butt we need some advice
the car is bone stock, has a manual tranny
and is going to be drived all week so, wich ratio should we buy.?
3.55
3.73
4.10
the car will not be used on long trips.

------------------
81 Mustang
91 5.0HO carb. Holley 650 edelbrock performer 289 intake, t-5 Stock 8.8 rear end 3.55 gears, pony rims, 91 GT dress up kit, 91 dash, recaro seats, pro 5.0 short shifter,cranecams fireball ignition, and more...

MDM · 01-14-2001, 11:31 PM

I put 355s on mine and with the t-5 a 23 tooth speedo gear gets you in the ballpark
as far as mph correction, provided you are using stock tire height. Increasing tire height slightly with the 23 tooth shoudl put about spot on. Once I added the blower, I was glad I did not go any higher numerically, but for NA 3.73 are an option you may want to consider. Many out there love them and I bet you will get some replies that recommend the 4.10s, though your highway RPM will suffer. Consider going with the motorsport gears as they set up very nicely, are unlikely to whine, and offer good value and durability on a street car.

BowTie Eater 5 Liter · 01-14-2001, 11:33 PM

if he uses different gears his speedo will probably get screwed up (guy i know has 3.55's, 5-speed & his is really off)
the 3.73's will probably improve 1/4 mile by 3-4 tenth's depennding on driving style (limited to around 130mph with stock size rubber).
3.55's are perfect for street & daily driving (runs around 140mph, police verified 137mph when they handed the guy i know his ticket. OUCH!).
4.10's should be used with taller tire (dont know top speed, probably around 110-120mph with stock sized tire)
I would go for the 3.55's
Hope this helps

------------------
No Smog Pump (Shorty Belt), Dumps At The End Of Stock H-Pipe (Sounds Mean), K&N Air Filter, 198.9 rwhp @4200 (235 Motor!!), 285 lbs-ft @2900 (336 Motor!!!).

quick89gt · 01-14-2001, 11:39 PM

Put me down fo 3.73's...I had them put in even before I did the performance rebuild on my motor (i.e. the motor was stock other than some bolt ons) and DAMN did they make a difference. I love them, and wouldn't give them up for anything. When I picked my car up from the shop, the guy said, "Man, just try and keep that damn thing between the ditches." hehehe...he took it for a test drive to make sure everything was all good and nailed it...and got all squirrely (sp) so, anyways, I would strongly recommend the 3.73's. I have a buddy who has almost the same motor as me (nicks 5.0) and he has 3.55's....then he drove my car, and fell in love with the 3.73's....just somethin' to thinka bout. also, rpm's going down the interstate are going to be a negligable difference, like 500 or so. i run about 3,000k @ 80mph. It also makes for EASY passing of any cars on the road!!

------------------
*************************
'89 GT, T-5,
Bored .030 Over, GT-40P heads, MAC 1 5/8" headers, MAC Off-Road H-Pipe, 2 1/2" Flowmasters, Edelbrock 65mm T.B., Trick Flow Intakes, Crane 2031 cam, 1.7 Roller Rockers, Keith Black hyp. flat top Pistons, Screamin' Deamon Coil, Champion Plugs, March Underdrive Pulleys, 255lph Fuel Pump, SVO Motorsport Clutch, Adjustable Fuel Pressure Regulator, Formula GP Suspension, MAC Upper & Lower Control Arms, FMS 3.73 Gears.
*************************

01-14-2001, 11:56 PM

I like my 3.73's. I also like 4.10's. I will keep my car N/A, so if I could do it again, I would put in 4.10's (probably eventually will). I wouldn't go less than a 3.73, in my opinion.

Remember, you do have overdrive so unless you are driving 85+ then rpm's won't be a problem. If you plan on other mods to the motor and want to keep it N/A then go with 4.10, but if you want a good street gear, 3.73 (possible power adder).

See if you can ride in or drive cars with other gears. Look into it carefully before you make an investment like that, so you know what you really want.

90dpscoupe · 01-15-2001, 12:30 AM

Hey you guys with 3.73's, do ya'll have your speedos correct? did you have to get another speedo gear?

oh and yea everyone has given good advice, the n/a motor is good with 4.10's or 3.73's, i've even rode in a 90lx with 347 stroker and 4.30 grs, it actually rode alright at about 65 mph, but good luck getting traction with street tires

, i dont think im gonna regret my 3.73 swap.

------------------
90 lx coupe: Mac cold air fenderwell, accel supercoil,advncd ignition,3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows.
Best time: 14.20(on 225/60/15 firehawks)
Best mph 97.80
Best 60' 2.1
next mods: subframes, 3.73's

89FHPLX · 01-15-2001, 01:06 AM

Hey 90dpscoupe, I have 3.08's but my speedo goes up to 160mph. I know that my acurate mph is not correct. How can I fix this problem or can I get the speedo gears for it. Do I need to change that on the tranny?? Remember, My car originaly came with 140mph speedo but the police change that to 160mph.

------------------
89 Police Interceptor
BBK Shorty Headers, K@N Cone Filter,H-pipe no cats, 2 chamber FlowMasters,Under Drive Pullys,14 degree Timing, Short Belt, No Air Silencer, oil cooler, 3.08's, And All Police Package goodies

NOS_Notch · 01-15-2001, 01:12 AM

Well these are your choices....
1. Go as fast as possible, screw the mpg
2. Go mediocre fast and save .005 mpg
4.10's you will turn around 3000 r's @ 75mph
anything else is just a slower ET. and a waste of money.
Sure, you will be faster w/ 3.55's instead of 2.73's but will still get your *** kicked.
My car goes 13.28 w/ 4.10's and long tubes.
12.50's on a 75 shot.......you make the choice, and that is on a (for all you who disagree) 26 inch tire.

------------------
4.10's,long tubes & 75 shot...Goes 12.50's
Check it out at http://www.burnouts.webprovider.com

01-15-2001, 01:18 AM

90dpscoupe

I believe my speedo is fairly accurate. I think I put a 23 tooth (can't remember). Anyways they are color coded, I think mine is red and I bought it from D&D in Livonia, MI for $10.

90dpscoupe · 01-15-2001, 01:49 AM

89fhp, mine of course came with the 160 speedo too, and 3.08's i know mine was accurate, and still is after the 3.27 install, i had the shop put the right one in, which was "used" like the gears,

yours should be fine, i drove past one of the speed limit signs that post your speed, and it said 39mph, and sure enough the needle was just under 40mph on my speedo. thnx

89FHPLX · 01-15-2001, 03:02 AM

90dpscoupe.... I usually run into a caddilac in the highway and they have those big digital displays. I drive next to them and there displays show 70mph and mine shows 80mph. This always happends when I run into a caddi. At that speed my RPM's are at 2100. What should the speed be with 3.08's gears.

------------------
89 Police Interceptor
BBK Shorty Headers, K@N Cone Filter,H-pipe no cats, 2 chamber FlowMasters,Under Drive Pullys,14 degree Timing, Short Belt, No Air Silencer, oil cooler, 3.08's, And All Police Package goodies

Skyman · 01-15-2001, 04:19 AM

I go for 3.73, but maybe thats just cuz what I have.

Anyways, I'm stick of seeing people post crap they dont know anything about. They wil definatly not lower your topspeed. You will most likely gain topspeed. You dont even have enough power to take advantage of all the gear you have now. I have 3.73's and I could pull 170mph theoretically at 6000rpm. So idiots need to stop talking about what they dont know. These cars do have overdrive.

Skyler

------------------
-1989 Saleen Mustang #406-
TFS Heads, Edelbrock intake, E-303, 3.73's, 1 5/8 shortys, Offroad-H, 2chamber flows, 36psi FPR, 15degrees timing, 70mm tb, 73mm maf, 24lb inj, Crank pulley, MSD6A, Alum driveshaft.

On its way: Paxton Sn-89 with dyno tuning and long tubes.

Just added: B&M Ripper, Weldin Subframes, & Turn downs!
13.2@106mph

LOCASH · 01-15-2001, 08:03 AM

My car came with 3.27's (the E option)with an AOD. I have the 3.73's in the trunk. I bought the 3.73's because I am saving up for a Kenne Bell. Will I notice a big difference when the gears are installed?

------------------
86 GT T-tops, AOD, B&M shift kit and hammer shifter, ROH wheels, K&N, Timing,MAC headers, 2.5 off road H, 2.5 American Thunder, 87 spindles, rear disc,SS lines, BBK 1.5, poly bushings, Crutchfield front kick panel speakers.
"DRIVE LIKE YOU STOLE IT!"

01-14-2001, 11:07 PM	#1
Mouse Eater Registered Member Join Date: Jul 2000 Location: Caracas, Baruta, Venezuela Posts: 11	3.55, 3.73 or 4.10 Hi i have a friend that just bougth a 1993 5.0 that have 5.000 original miles on it the car looks great and is bone stock , he want´s to put a set of gears butt we need some advice the car is bone stock, has a manual tranny and is going to be drived all week so, wich ratio should we buy.? 3.55 3.73 4.10 the car will not be used on long trips. ------------------ 81 Mustang 91 5.0HO carb. Holley 650 edelbrock performer 289 intake, t-5 Stock 8.8 rear end 3.55 gears, pony rims, 91 GT dress up kit, 91 dash, recaro seats, pro 5.0 short shifter,cranecams fireball ignition, and more...

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01-14-2001, 11:31 PM	#2
MDM Registered Member Join Date: Feb 2000 Location: Flemington, NJ USA Posts: 166	I put 355s on mine and with the t-5 a 23 tooth speedo gear gets you in the ballpark as far as mph correction, provided you are using stock tire height. Increasing tire height slightly with the 23 tooth shoudl put about spot on. Once I added the blower, I was glad I did not go any higher numerically, but for NA 3.73 are an option you may want to consider. Many out there love them and I bet you will get some replies that recommend the 4.10s, though your highway RPM will suffer. Consider going with the motorsport gears as they set up very nicely, are unlikely to whine, and offer good value and durability on a street car.

01-14-2001, 11:33 PM	#3
BowTie Eater 5 Liter Registered Member Join Date: Nov 2000 Location: Maple Ridge B.C. Canada, The Best Place In The World Posts: 871	if he uses different gears his speedo will probably get screwed up (guy i know has 3.55's, 5-speed & his is really off) the 3.73's will probably improve 1/4 mile by 3-4 tenth's depennding on driving style (limited to around 130mph with stock size rubber). 3.55's are perfect for street & daily driving (runs around 140mph, police verified 137mph when they handed the guy i know his ticket. OUCH!). 4.10's should be used with taller tire (dont know top speed, probably around 110-120mph with stock sized tire) I would go for the 3.55's Hope this helps ------------------ No Smog Pump (Shorty Belt), Dumps At The End Of Stock H-Pipe (Sounds Mean), K&N Air Filter, 198.9 rwhp @4200 (235 Motor!!), 285 lbs-ft @2900 (336 Motor!!!).

01-14-2001, 11:39 PM	#4
quick89gt Registered Member Join Date: Apr 2000 Location: O'Fallon, IL Posts: 243	Put me down fo 3.73's...I had them put in even before I did the performance rebuild on my motor (i.e. the motor was stock other than some bolt ons) and DAMN did they make a difference. I love them, and wouldn't give them up for anything. When I picked my car up from the shop, the guy said, "Man, just try and keep that damn thing between the ditches." hehehe...he took it for a test drive to make sure everything was all good and nailed it...and got all squirrely (sp) so, anyways, I would strongly recommend the 3.73's. I have a buddy who has almost the same motor as me (nicks 5.0) and he has 3.55's....then he drove my car, and fell in love with the 3.73's....just somethin' to thinka bout. also, rpm's going down the interstate are going to be a negligable difference, like 500 or so. i run about 3,000k @ 80mph. It also makes for EASY passing of any cars on the road!! ------------------ *********************** '89 GT, T-5, Bored .030 Over, GT-40P heads, MAC 1 5/8" headers, MAC Off-Road H-Pipe, 2 1/2" Flowmasters, Edelbrock 65mm T.B., Trick Flow Intakes, Crane 2031 cam, 1.7 Roller Rockers, Keith Black hyp. flat top Pistons, Screamin' Deamon Coil, Champion Plugs, March Underdrive Pulleys, 255lph Fuel Pump, SVO Motorsport Clutch, Adjustable Fuel Pressure Regulator, Formula GP Suspension, MAC Upper & Lower Control Arms, FMS 3.73 Gears. ***********************

01-14-2001, 11:56 PM	#5
88GT5.013.02 Guest Posts: n/a	I like my 3.73's. I also like 4.10's. I will keep my car N/A, so if I could do it again, I would put in 4.10's (probably eventually will). I wouldn't go less than a 3.73, in my opinion. Remember, you do have overdrive so unless you are driving 85+ then rpm's won't be a problem. If you plan on other mods to the motor and want to keep it N/A then go with 4.10, but if you want a good street gear, 3.73 (possible power adder). See if you can ride in or drive cars with other gears. Look into it carefully before you make an investment like that, so you know what you really want.

01-15-2001, 12:30 AM	#6
90dpscoupe Registered Member Join Date: Jun 2000 Location: sanantonio, Tx, usa Posts: 1,407	Hey you guys with 3.73's, do ya'll have your speedos correct? did you have to get another speedo gear? oh and yea everyone has given good advice, the n/a motor is good with 4.10's or 3.73's, i've even rode in a 90lx with 347 stroker and 4.30 grs, it actually rode alright at about 65 mph, but good luck getting traction with street tires , i dont think im gonna regret my 3.73 swap. ------------------ 90 lx coupe: Mac cold air fenderwell, accel supercoil,advncd ignition,3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows. Best time: 14.20(on 225/60/15 firehawks) Best mph 97.80 Best 60' 2.1 next mods: subframes, 3.73's

01-15-2001, 01:06 AM	#7
89FHPLX Registered Member Join Date: Aug 2000 Location: Miami, Florida Posts: 116	Hey 90dpscoupe, I have 3.08's but my speedo goes up to 160mph. I know that my acurate mph is not correct. How can I fix this problem or can I get the speedo gears for it. Do I need to change that on the tranny?? Remember, My car originaly came with 140mph speedo but the police change that to 160mph. ------------------ 89 Police Interceptor BBK Shorty Headers, K@N Cone Filter,H-pipe no cats, 2 chamber FlowMasters,Under Drive Pullys,14 degree Timing, Short Belt, No Air Silencer, oil cooler, 3.08's, And All Police Package goodies

01-15-2001, 01:12 AM	#8
NOS_Notch Registered Member Join Date: Sep 2000 Location: Fresno,CA. USA Posts: 384	Well these are your choices.... 1. Go as fast as possible, screw the mpg 2. Go mediocre fast and save .005 mpg 4.10's you will turn around 3000 r's @ 75mph anything else is just a slower ET. and a waste of money. Sure, you will be faster w/ 3.55's instead of 2.73's but will still get your *** kicked. My car goes 13.28 w/ 4.10's and long tubes. 12.50's on a 75 shot.......you make the choice, and that is on a (for all you who disagree) 26 inch tire. ------------------ 4.10's,long tubes & 75 shot...Goes 12.50's Check it out at http://www.burnouts.webprovider.com

01-15-2001, 01:18 AM	#9
88GT5.013.02 Guest Posts: n/a	90dpscoupe I believe my speedo is fairly accurate. I think I put a 23 tooth (can't remember). Anyways they are color coded, I think mine is red and I bought it from D&D in Livonia, MI for $10.

01-15-2001, 01:49 AM	#10
90dpscoupe Registered Member Join Date: Jun 2000 Location: sanantonio, Tx, usa Posts: 1,407	89fhp, mine of course came with the 160 speedo too, and 3.08's i know mine was accurate, and still is after the 3.27 install, i had the shop put the right one in, which was "used" like the gears, yours should be fine, i drove past one of the speed limit signs that post your speed, and it said 39mph, and sure enough the needle was just under 40mph on my speedo. thnx

01-15-2001, 03:02 AM	#11
89FHPLX Registered Member Join Date: Aug 2000 Location: Miami, Florida Posts: 116	90dpscoupe.... I usually run into a caddilac in the highway and they have those big digital displays. I drive next to them and there displays show 70mph and mine shows 80mph. This always happends when I run into a caddi. At that speed my RPM's are at 2100. What should the speed be with 3.08's gears. ------------------ 89 Police Interceptor BBK Shorty Headers, K@N Cone Filter,H-pipe no cats, 2 chamber FlowMasters,Under Drive Pullys,14 degree Timing, Short Belt, No Air Silencer, oil cooler, 3.08's, And All Police Package goodies

01-15-2001, 04:19 AM	#12
Skyman I need 110mph Trap Speed! Join Date: Feb 1999 Location: So, CA Posts: 4,315	I go for 3.73, but maybe thats just cuz what I have. Anyways, I'm stick of seeing people post crap they dont know anything about. They wil definatly not lower your topspeed. You will most likely gain topspeed. You dont even have enough power to take advantage of all the gear you have now. I have 3.73's and I could pull 170mph theoretically at 6000rpm. So idiots need to stop talking about what they dont know. These cars do have overdrive. Skyler ------------------ -1989 Saleen Mustang #406- TFS Heads, Edelbrock intake, E-303, 3.73's, 1 5/8 shortys, Offroad-H, 2chamber flows, 36psi FPR, 15degrees timing, 70mm tb, 73mm maf, 24lb inj, Crank pulley, MSD6A, Alum driveshaft. On its way: Paxton Sn-89 with dyno tuning and long tubes. Just added: B&M Ripper, Weldin Subframes, & Turn downs! 13.2@106mph

01-15-2001, 08:03 AM	#13
LOCASH Registered Member Join Date: Oct 2000 Location: Santa Lucia di Budoia, Italy Posts: 217	My car came with 3.27's (the E option)with an AOD. I have the 3.73's in the trunk. I bought the 3.73's because I am saving up for a Kenne Bell. Will I notice a big difference when the gears are installed? ------------------ 86 GT T-tops, AOD, B&M shift kit and hammer shifter, ROH wheels, K&N, Timing,MAC headers, 2.5 off road H, 2.5 American Thunder, 87 spindles, rear disc,SS lines, BBK 1.5, poly bushings, Crutchfield front kick panel speakers. "DRIVE LIKE YOU STOLE IT!"