Need help deciding! What are pros & cons of using 3:73 vs 4:10 gears in '02 Mustang?

sterlinator · 10-05-2002

i want to put gears on my 02 gt. what are the pros and cons on 3:73's vs. 4:10's.

Twister · 10-05-2002

you might want to do a search on this, there have been many posts on this subject, I say go for 3.90's

Vortex · 10-05-2002

Heres just one of the many threads on this subject....
http://www.allfordmustangs.com/forum...3.73s+or+4.10s

It all depends on what you want from your car.

Tat98Cobra · 10-05-2002

4:10's or more - Modular motors need to run in the upper rpm's to be happy. I wished I had gone to 4:30's or more actually. 3:73's are a great gear for a 5.0, but not a 4.6 - you wont notice too much difference , imo
The pro's of 4:10's - you'll smile alot more. The cons, you may lose a tiny bit of mpg.
THe pro's of 3:73's - Ummmm, cant think of any. The cons, you'll regret them because it wont be that much difference.

milw96cobra · 10-05-2002

4.10's

Dont fear the gear.

milw96cobra · 10-05-2002

Quote:

Originally posted by Tat98Cobra
4:10's or more - Modular motors need to run in the upper rpm's to be happy. I wished I had gone to 4:30's or more actually. 3:73's are a great gear for a 5.0, but not a 4.6 - you wont notice too much difference , imo
The pro's of 4:10's - you'll smile alot more. The cons, you may lose a tiny bit of mpg.

Thats completely incorrect about the gas mileage... your mileage will in fact go up, provided that you can keep your foot out of it, and keep her under 3200 rpms.

Twister · 10-05-2002

Milw, that is incorrect, more RPM for the same speed means more fuel....

KSP · 10-05-2002

3.73 on the street all the way...

Stangman98 · 10-06-2002

4.10's no matter what. You will not regret it.

Tat98Cobra · 10-06-2002

Quote:

The pro's of 4:10's - you'll smile alot more. The cons, you may lose a tiny bit of mpg.

THe key word here is May.
If you dont lose any mpg, than you're a very disciplined person - most of us cant keep our foot out of it after steeper gears

milw96cobra · 10-07-2002

Quote:

Originally posted by Twister
Milw, that is incorrect, more RPM for the same speed means more fuel....

Twister, that is incorrect... less you have to keep foot into gas pedal means less flow through the injectors means less fuel spent.

There was a VERY long thread about people with 4.30's and 4.56's posting their gas mileage on the corral.... most of them get 24 or more miles per the gallon... some were posting theyve gone over 300 miles on 12 gallons.

So, now you tell me where you're getting your figures from.

mgranzow · 10-07-2002

Quote:

Originally posted by milw96cobra

Twister, that is incorrect... less you have to keep foot into gas pedal means less flow through the injectors means less fuel spent.

There was a VERY long thread about people with 4.30's and 4.56's posting their gas mileage on the corral.... most of them get 24 or more miles per the gallon... some were posting theyve gone over 300 miles on 12 gallons.

So, now you tell me where you're getting your figures from.

w3rD!!

with my 3.73's (5.0) i gained 3mpg even with my foot in it.

with higher gears, you may be turning more RPM, but the injectors are under a very light workload so it doesn't use as much fuel.. believe me, it took me a while to convince milw96cobra to get something more than 4.10's, and even today, i tell him he shoulda gotten 4.56's, but the 4.30's are going in today at the shop.. oh well.

mustangdnky · 10-19-2002

After reading this post I am gonna go with 4.10's. Only, question that I need to know is does 4.10's cause you to spin your tires alot especially in the rain?

Tat98Cobra · 10-19-2002

If you control yourself, you'll be fine in the rain. You only spin when you want to spin, and with the 4:10's its just way easier to do so

rks'92/5.0 · 10-19-2002

ah, yes gears are you going NA or power adder? S/C or TURBO 3:73's if you go NA or NOS 4:10's