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Author
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Topic: diffrence between 373's and 390's?
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50PrNcEsSGT
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Member # 2308
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posted
 
 
I need to decide which gears to get the majority of people recomended 373s and a couple 390s...I have a 95 gt and its an automatic but I need to decide soon and I was just wondering if someone could explain what the diffrence really is and how it will effect the car. I have a pretty good commute everyday about 50 miles so if that makes a diffrence. Thanks!
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BUILD A BRIDGE ...AND GET OVER IT!!!!!!
Posts: 1325 | From: Bay Area | Registered: Jan 2003
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KCmustangboy
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Member # 1927
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posted
If ford has released 3.90s I would get them. But only if they are Ford Racing Ring and Pinon, some of the other brands seem to have issues and the setup isn't as easy. However with a 50 mile commute your might want to go with 3.73s, is your car a 5 speed? if so drive to work one day in 4th gear on the freeway, thats close to a 3.90, if that seems like way to much go for the 3.73s
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03 Cobra... Factory long block, with Whipple and AED tune... 812rwhp 10.0s @ 140... almost there!
WWW.AEDHP.COM
Posts: 1691 | From: San Jose, CA | Registered: Oct 2002
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66 AC COBRA
Nitrous King
Member # 904
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posted
on the freeway at 75 mph u will run 2500rpm wit hthe 3.73's
on the freeway at 75 mph u will run 2600rpm with the 3.90's
but since u have a auto both numbers will go up because of converter slip
but i say go with the 3.90 because u have an auto, 4.10's would be best but 4.10's with that commute would suck
will the 3.73's vs. the 3.90 u will probably not notice differnce at the track or on the freeway, either gear will be better than stock
![[Big Grin]](biggrin.gif) ![[patriot]](graemlins/patriot.gif)
[ May 14, 2003, 01:18 PM: Message edited by: 66 AC COBRA ]
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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KCmustangboy
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Member # 1927
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posted
quote:
Originally posted by 66 AC COBRA:
on the freeway at 75 mph u will run 2500rpm wit hthe 3.73's
on the freeway at 75 mph u will run 2600rpm with the 3.90's
but since u have a auto both numbers will go up because of converter slip
but i say go with the 3.90 because u have an auto, 4.10's would be best but 4.10's with that commute would suck
will the 3.73's vs. the 3.90 u will probably not notice differnce at the track or on the freeway, either gear will be better than stock
Don't listen to him, get 4.56s and toast everyone off the line
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03 Cobra... Factory long block, with Whipple and AED tune... 812rwhp 10.0s @ 140... almost there!
WWW.AEDHP.COM
Posts: 1691 | From: San Jose, CA | Registered: Oct 2002
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Primer GR40
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Member # 476
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posted
3.90's for sure. But how fast are you actually going on your commute? Above 65mph? If not, I'd go for the 4.10's. I got a stickshift and 4.30's. I dont mind em ![[burnout]](graemlins/burnout.gif)
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Superdupercharged Cobra
No Transmatic Notch
Posts: 2108 | Registered: Sep 2001
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50PrNcEsSGT
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Member # 2308
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posted
Well the guy at the place broke it down for me and thought I should get I want to say 353 but maybe it was 373( I know thats not good I dont remember but is there such thing as 353 n e ways) so he explained the whole rpm thing and about being on the freeway. I dropped it off this morning and went there after work he told me the things I needed to know and about driving with the new gears. Also he's getting me the ones from ford and told me after think it was 500 miles bring it back to him and he'll take all the metal off that came from the gears breaking in...N e ways to make a long story short dudes hella cool and is taking care of me and I know were to go for the rest of my stuff. Thanks for responding and helping me out if u have ne more tips recomendations let me know.
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BUILD A BRIDGE ...AND GET OVER IT!!!!!!
Posts: 1325 | From: Bay Area | Registered: Jan 2003
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66 AC COBRA
Nitrous King
Member # 904
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posted
they do make 3.55 gears, those are way to low for u car since it is an auto, 3.73 or higher, any less and its not worth it, even if u are having id done by insurance, might as well get it done right the first time, i would just get the 3.73 and be done with it and save a little on gas over 3.90's
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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50PrNcEsSGT
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Member # 2308
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K well then he must have said 373's I know I should remember but this weeks just been crazy and everything people say goes in one ear and five min later I dont remember wtf they said. Ill give him a call in the morning to make sure but thanks.
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BUILD A BRIDGE ...AND GET OVER IT!!!!!!
Posts: 1325 | From: Bay Area | Registered: Jan 2003
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The Nick
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Member # 2244
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posted
I decided to break the conventional rules and go with 4.10s on a T5 car. I'd go with the 3.73s though because of the commute.
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Fast, Cheap or Reliable. Pick two and live with it.
Posts: 1215 | From: The Delta | Registered: Dec 2002
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166 Merlo
FELONY
MOTORSPORTS
Member # 1549
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posted
Girls like 3.55's. Get those.
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'89 - Boss Coupe
'70 - Drop Cutthang
'68 - Cougnut
'87 - 0166, Its real
Posts: 3954 | From: Thebay | Registered: Jul 2002
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