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06-24-2008, 10:24 AM
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#1
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3:55 or 3:73 gears....Need advice
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Registered User
Join Date: Jun 2008
State: Michigan
Posts: 8
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I got a pretty much all stock 95 GT that has just a few basic bolt on things/exhaust system. I'm gonna change the gears in her but Im stuck on which gears I should get....3:55 or 3:73. I want to gain the low end torque without losing much on my top end so Im unsure on which to go with. I know everybody says to go with 3:73 gears but I dont know enough to know what the big difference is between the two. I want it to be worth my time but Im not trying to make it into a drag car just yet cause the whole cost of doing so is stopping me. I basically want to achieve an everyday driving car that has a little bit more move to it than just a normal stock one would have. Feel free to leave any other suggestions if you think it would be best to go another direction. THanks all! |
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06-24-2008, 11:37 AM
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#2
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Re: 3:55 or 3:73 gears....Need advice
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Deranged
Join Date: Jan 2005
City: Largo
State: Florida
Posts: 6,157
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Differential Gear Ratio determines the number of times the drive shaft (or pinion) will rotate for each turn of the wheels (or ring gear). So if you have a 3.73:1 gear ratio the drive shaft turns 3.73 times for every turn of the wheel.
Gear ratio is calculated by dividing the number of teeth on the ring gear by the number of teeth on the pinion gear. The higher the number, the lower the ratio: a 5.29 gear has a lower ratio than a 4.10 gear. With a lower gear ratio the drive shaft (and thus the engine) turns more for each revolution of the wheel, delivering more power and torque to the wheel for any given speed. Lower ratios are generally desirable when going off-road. Higher ratios are better for freeway driving since they run at lower RPM’s and offer better fuel economy
I've found the 3:73 to be a good overall gears sometime I wish I had the 4:10 But I'm happy with the 3:73 And With The Climbing Gas Prices, Go 3:55 If You Do A Lot Of Highway Driving. If You Stay On Streets Then The 373's Will Work
__________________
Mods-MAc CAI , True Dual Flowmaster 40,3.73 ,T-Lok, 25% UDP, 3/8 Phenolic Intake Spacer ,Steeda Tri-ax, SCT Chip/ Tune
Last edited by Herbstang; 06-24-2008 at 11:40 AM.
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06-24-2008, 07:56 PM
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#3
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Re: 3:55 or 3:73 gears....Need advice
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I don't think that's gonna buff out
Join Date: May 2005
City: Chino
State: California
Posts: 662
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I have the 3.73's as well and I really like them....there's not much of a difference between the 3.55's and 3.73's so i would say go with the 3.73's.....you're not going to gain much in MPG if you drop to the lower gears. |
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06-24-2008, 08:58 PM
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#4
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Re: 3:55 or 3:73 gears....Need advice
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Human Mamogram
Join Date: May 2008
City: Baton Rouge
State: Louisiana
Posts: 1,529
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3.73, you wont notice jack with 3.55 some cars came stock with them.if u decide on 3.55 i got 5 used sets on the shelf.
__________________
2002 GT,T56,99 cobra aluminum block, Eagle rods,Mahle coated pistons,04 cobra crank,04 cobra heads/cams,UPR tubular K-member kit,full UPR solid race rear suspension,NOS direct port wet kit,fidanza flywheel, spec2+ clutch,motorsport 4:10s,full Hearthrob exhaust.
uhh.. i mean its stock... 
303 rwhp & 312ft/lbs tq(N/A-untuned)
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06-24-2008, 09:00 PM
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#5
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Re: 3:55 or 3:73 gears....Need advice
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Imma Ho...
Join Date: Aug 2004
City: Baton Rouge
State: Louisiana
Posts: 9,957
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I may know someone wanting one of those sets. 
Hmm...I may want a set as well for the fox now that I Think about it. Trade you my 4.10's that are in the rear end at the house for a set of those 3.55's.
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06-24-2008, 09:28 PM
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#6
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Re: 3:55 or 3:73 gears....Need advice
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I just lubricated on your foot!
Join Date: Feb 2007
City: Vicksburg
State: Mississippi
Posts: 783
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neither...4.10's...that is all...
Unless you are already or intend to go FI in the never near future, 4.10's would work best for your application...
If you are or will be going FI, then 3.73's...
__________________
'05 GT - Borla Catback, Koni Adjustable Shocks/Struts, Hawk HP+ Brakes all around, Steeda Front Sway Bar & End-Links, Hoosier A6's on Enkei Race Wheels, Royal Purple Fluids
'07 F-150 Ext. Cab XLT Flareside - 5.4 Triton - Roush Dual Exit Cat Back
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06-24-2008, 10:20 PM
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#7
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Re: 3:55 or 3:73 gears....Need advice
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I don't think that's gonna buff out
Join Date: May 2005
City: Chino
State: California
Posts: 662
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4.10's are really low for that tranny....first gear is 3.35 so in slow traffic the car will buck and jerk |
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06-25-2008, 06:17 AM
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#8
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Re: 3:55 or 3:73 gears....Need advice
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Bob is Good.
Join Date: Jun 2004
City: Greenville
State: Texas
Posts: 5,170
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Is this an automatic or manual?
The general rule that most go by is 3.73s for a manual, 4.10s for an automatic. |
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06-25-2008, 07:04 AM
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#9
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Re: 3:55 or 3:73 gears....Need advice
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Deranged
Join Date: Jan 2005
City: Largo
State: Florida
Posts: 6,157
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__________________
Mods-MAc CAI , True Dual Flowmaster 40,3.73 ,T-Lok, 25% UDP, 3/8 Phenolic Intake Spacer ,Steeda Tri-ax, SCT Chip/ Tune
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06-25-2008, 07:14 AM
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#10
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Re: 3:55 or 3:73 gears....Need advice
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Human Mamogram
Join Date: May 2008
City: Baton Rouge
State: Louisiana
Posts: 1,529
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i always run 4.10s on a n/a combination.. they are most effective.
rob, we can trade if you want.
__________________
2002 GT,T56,99 cobra aluminum block, Eagle rods,Mahle coated pistons,04 cobra crank,04 cobra heads/cams,UPR tubular K-member kit,full UPR solid race rear suspension,NOS direct port wet kit,fidanza flywheel, spec2+ clutch,motorsport 4:10s,full Hearthrob exhaust.
uhh.. i mean its stock...
303 rwhp & 312ft/lbs tq(N/A-untuned)
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06-25-2008, 07:49 AM
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#11
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Re: 3:55 or 3:73 gears....Need advice
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WTF^^...
Join Date: May 2003
City: Hoover / Florence
State: Alabama
Posts: 27,124
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3.55 vs 3.73 is very minimal in difference, go 3.73
__________________
2003 REDFIRE COBRA #3938 of 5082 @ 05/27/2003 1 of 414
MGW Shifter, Stingers, JLT, SS Inserts, MM FLSFC & CC Plates, SS Lines, H&R Race springs, IRS Brace, MRT Hood Struts
ME.com Member #29 - 400rwhp/380rwtq
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06-25-2008, 09:22 AM
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#12
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Re: 3:55 or 3:73 gears....Need advice
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Imma Ho...
Join Date: Aug 2004
City: Baton Rouge
State: Louisiana
Posts: 9,957
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I'll pull them out of that rear end and let you take a look at them. If you like then we can swap gears.
What all will you want? Obviously the ring and pinion, anything else from it like spider gears or anything?
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06-25-2008, 10:32 AM
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#13
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Re: 3:55 or 3:73 gears....Need advice
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Human Mamogram
Join Date: May 2008
City: Baton Rouge
State: Louisiana
Posts: 1,529
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naa, we can just swap the gears. imma go 3.55 too when i hit the 800 rwhp mark
__________________
2002 GT,T56,99 cobra aluminum block, Eagle rods,Mahle coated pistons,04 cobra crank,04 cobra heads/cams,UPR tubular K-member kit,full UPR solid race rear suspension,NOS direct port wet kit,fidanza flywheel, spec2+ clutch,motorsport 4:10s,full Hearthrob exhaust.
uhh.. i mean its stock...
303 rwhp & 312ft/lbs tq(N/A-untuned)
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06-26-2008, 01:43 AM
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#14
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Re: 3:55 or 3:73 gears....Need advice
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Registered User
Join Date: Jun 2008
City: Hoffman Estates
State: Illinois
Posts: 6
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what kind of mileage loss can a 2001 v6 expect when going with the 3.73 gears? |
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06-26-2008, 07:43 AM
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#15
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Re: 3:55 or 3:73 gears....Need advice
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Human Mamogram
Join Date: May 2008
City: Baton Rouge
State: Louisiana
Posts: 1,529
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not enough to matter, even with 4:10s its not very significant because it doesent take as much power to get the car moving but loses it on long drives, so it balances out.
__________________
2002 GT,T56,99 cobra aluminum block, Eagle rods,Mahle coated pistons,04 cobra crank,04 cobra heads/cams,UPR tubular K-member kit,full UPR solid race rear suspension,NOS direct port wet kit,fidanza flywheel, spec2+ clutch,motorsport 4:10s,full Hearthrob exhaust.
uhh.. i mean its stock...
303 rwhp & 312ft/lbs tq(N/A-untuned)
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06-26-2008, 07:53 AM
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#16
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Re: 3:55 or 3:73 gears....Need advice
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WTF^^...
Join Date: May 2003
City: Hoover / Florence
State: Alabama
Posts: 27,124
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in my 01 v6 with 3.73, cai, upd, and exhaust (manual trans) I would get 22mpg city/hwy mix. I would say you will lose 2mpg on the highway maybe 3 and gain about 1 in the city.
__________________
2003 REDFIRE COBRA #3938 of 5082 @ 05/27/2003 1 of 414
MGW Shifter, Stingers, JLT, SS Inserts, MM FLSFC & CC Plates, SS Lines, H&R Race springs, IRS Brace, MRT Hood Struts
ME.com Member #29 - 400rwhp/380rwtq
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06-26-2008, 11:26 AM
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#17
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Re: 3:55 or 3:73 gears....Need advice
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Registered User
Join Date: Jun 2008
City: Hoffman Estates
State: Illinois
Posts: 6
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06-26-2008, 11:50 AM
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#18
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Re: 3:55 or 3:73 gears....Need advice
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Registered User
Join Date: Jun 2008
State: Michigan
Posts: 8
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Hey all, thanks for the great info/advice. I greatly appreciate it. Im gonna go ahead and go with the 3:73's...as that sounds like the best thing for me at this time. However, SimpleOrangeTPS, I also am interested in a set of your 3:55's as well. What you want for a set of them??? Let me know. Thanks again! |
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06-26-2008, 06:18 PM
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#19
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Re: 3:55 or 3:73 gears....Need advice
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Registered User
Join Date: Jun 2008
City: east alton
State: Illinois
Posts: 10
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i got 4.11's in my stock 94 gt and well my trannys out but im puttin a t-5 in it
will that be good 4.11's with a 5-speed ?
or i got 2.73's |
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06-26-2008, 06:57 PM
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#20
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Re: 3:55 or 3:73 gears....Need advice
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Human Mamogram
Join Date: May 2008
City: Baton Rouge
State: Louisiana
Posts: 1,529
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youll be fine, dont change them ill u try it.
i wanna put 4.30s behind my t56
__________________
2002 GT,T56,99 cobra aluminum block, Eagle rods,Mahle coated pistons,04 cobra crank,04 cobra heads/cams,UPR tubular K-member kit,full UPR solid race rear suspension,NOS direct port wet kit,fidanza flywheel, spec2+ clutch,motorsport 4:10s,full Hearthrob exhaust.
uhh.. i mean its stock...
303 rwhp & 312ft/lbs tq(N/A-untuned)
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