Go Back   MustangForums.com > Ford Mustang Tech > 4.6L (1996-2004 Modular) Mustang
Sign in using an external account
Register Forgot Password?
Search


4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.
Sponsored by Cruizin Concepts


Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 04-23-2013, 02:38 AM   #1
04Blue281
 
04Blue281's Avatar
 
Join Date: Apr 2013
Vehicle: 2004 Ford Mustang GT
Location: KCMO
Posts: 40
Default 3.90 gearing?

My recently purchased 2004 Mustang GT has the Tremec 3650 5-speed manual transmission and 3.27:1 rear end ratio. I don't plan on doing extensive engine modifications to add BIG horsepower --- only basic intake/exhaust mods and tuning to maximize the stock engine.

I will definitely be changing the final gearing --- the 3.27 gears have GOT to go!! From the research I've done, it seems like the 3.73 gears would be OK and the 4.10 gears might be a bit too much?? I'm thinking that 3.90 gears would be the "perfect" compromise.

So.... just curious ---- is anyone running 3.90 gears on a car like mine? Looking for any info I can get from those that have "been there, done that" before I spend $$$ on a set of gears/installation.
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
04Blue281 is offline   Reply With Quote
Old 04-23-2013, 03:08 AM   #2
04Blue281
 
04Blue281's Avatar
 
Join Date: Apr 2013
Vehicle: 2004 Ford Mustang GT
Location: KCMO
Posts: 40
Default

Oops! Read my own post and realized that you'll need more info.

I am not trying to optimize the car for 1/4 mile drag racing (or ANY kind of racing). And, the car isn't a "daily driver" --- it is just a car to have fun driving on the streets and highways on nice weather days. Just looking for a performance combination that will give me a strong running Mustang from 0- 115/120mph (gears 1-4) and put a smile on my face!
04Blue281 is offline   Reply With Quote
Old 04-23-2013, 08:12 AM   #3
Vertigo_GT
2nd Gear Member
 
Vertigo_GT's Avatar
 
Join Date: Apr 2013
Vehicle: 2004 GT Convertible
Location: Viera, FL
Posts: 216
Default

I'm interested inn 3.90 gears too. Same car, mild mods and driving profile as 04Blue281 except mine is an auto. Also, if I get a tuner which would firm up shifts, would a shift kit make much of a difference, or would I be better off spending my money on a TB/Plenum upgrade?
Vertigo_GT is offline   Reply With Quote
Old 04-23-2013, 08:54 AM   #4
uberstang1
Chupacabra
 
uberstang1's Avatar
 
Join Date: Jul 2004
Vehicle: 1997 Mustang GT, 2002 F150 XLT 4x4 Triton
Location: wilkes-barre PA
Posts: 9,427
MustangSVT97r
Send a message via AIM to uberstang1 Send a message via Yahoo to uberstang1
Default

Just go 4.10s especially if auto
__________________
Street Car, 4v D1sc, 20psi,viper spec t56, Team Z/ UPR suspension.
SKELETON CREW RACING
uberstang1 is offline   Reply With Quote
Old 04-23-2013, 10:28 AM   #5
MCxQubed
5th Gear Member
 
MCxQubed's Avatar
 
Join Date: Oct 2008
Vehicle: 2004 Mustang GT and 1967 Mustang Fastback
Location: New Jersey
Posts: 2,171
Mase V2SQ
Default

crusing rpms between 4.10s and 3.73s is only a 300rpm difference if youre worried about cruising on the highway or anything like that.

If you dont daily it, then i say 4.10s, but I've never had 3.73s so I be someone else will chime in that has had both
__________________


2004 Mustang GT
Vortech V2 SQ-Trim
3.33 Pulley
CX Racing Intercooler
Anderson Powerpipe
SLP Catted X
SLP Power-Flo Catback
Eibach Pro-Kit
Steeda Tri-Ax
SCT X3
FRPP 4:10's
Mac 70mm Throttle Body
Tuned by Big Daddy Performance

389 rwhp and 378 rwtq
MCxQubed is offline   Reply With Quote
Old 04-23-2013, 11:41 AM   #6
Dooney
1st Gear Member
 
Dooney's Avatar
 
Join Date: Dec 2012
Vehicle: 2001, Ford, Mustang GT
Location: Missouri
Posts: 94
Dooney91
Default

I have 3.73's with the t-3650 (supposedly... there when I bought the car) and I am redlining 4th right at 120.
Dooney is offline   Reply With Quote
Old 04-23-2013, 12:19 PM   #7
Tim99GT
4th Gear Member
 
Tim99GT's Avatar
 
Join Date: Dec 2007
Vehicle: 1999 Mustang GT
Location: Lafayette, LA
Posts: 1,700
Default

I have 3.90 gears and loved them when i was N/A. Not so much now being boosted. Its too much gear for a boosted car i believe. 1st gear was pointless even @ 400RW...
Again, when i was N/A i loved them. I wasn't making a lot of HP so they performed great and 1st wasn't so short. As soon as i tear into the rear end I'm swapping them out for 3.55's
__________________




KENNE BELL 2.1L = SOLD
KENNE BELL 2.8H = Waiting to be installed
Tim99GT is offline   Reply With Quote
Old 04-23-2013, 12:24 PM   #8
DeathRattle
2nd Gear Member
 
Join Date: Apr 2008
Vehicle: 2003 Ford Mustang GT
Location: NJ
Posts: 416
Default

I have 4.10s in my automatic 03 GT. It's fun at lower speeds but it kills top speed acceleration.
__________________
Esmeralda - 03 Stang GT: Sniper tune, PP intake/plenum/75mm TB, CAI, Full O/R Exhaust, UDP's, Cobra tank, dual 255 lph pumps, 4.10's, upgraded trans w Transpak, 2400 stall converter, grille delete...

Nadia - 2010 Camaro LS3 2SS/RS: SLP Blackwing, K&N Air Filter, SLP Under Drive Pulley, VMax TB, OBX 1-7/8 LTs with HF Cats, OBX 3" Cat-Back, Custom Predator Tune!!
DeathRattle is offline   Reply With Quote
Old 04-23-2013, 04:54 PM   #9
uberstang1
Chupacabra
 
uberstang1's Avatar
 
Join Date: Jul 2004
Vehicle: 1997 Mustang GT, 2002 F150 XLT 4x4 Triton
Location: wilkes-barre PA
Posts: 9,427
MustangSVT97r
Send a message via AIM to uberstang1 Send a message via Yahoo to uberstang1
Default

Quote:
Originally Posted by Tim99GT View Post
I have 3.90 gears and loved them when i was N/A. Not so much now being boosted. Its too much gear for a boosted car i believe. 1st gear was pointless even @ 400RW...
Again, when i was N/A i loved them. I wasn't making a lot of HP so they performed great and 1st wasn't so short. As soon as i tear into the rear end I'm swapping them out for 3.55's
I have 4.10s and im boosted, seems fine to me wish I did 4.30s
__________________
Street Car, 4v D1sc, 20psi,viper spec t56, Team Z/ UPR suspension.
SKELETON CREW RACING
uberstang1 is offline   Reply With Quote
Old 04-23-2013, 04:54 PM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 09:39 PM.

© Internet Brands, Inc.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup