How to find out my gear ratio. - The Mustang Source - Ford Mustang Forums

Go Back   >

2010-2014 Mustang News on the Previous Generation Mustang
Sponsored By: CARiD

How to find out my gear ratio.

Reply
 
 
 
Thread Tools Search this Thread
Old 6/5/11, 02:18 PM   #1
V6 Member
Thread Starter
 
LuisV's Avatar
 
Join Date: June 2, 2011
Location: Fort Polk, LA
Posts: 65
Thanks: 0
Thanked 0 Times in 0 Posts
How to find out my gear ratio.

forgive me for being an idiot. but how exactly can i found out my gear ratio? i keep reading other forums and people always say "look at your window sticker" and well, i've scanned over this thing countless times. its not on there anywhere. and others say, "if your going such and such speed at such and such RPMs than you have such and such gears". come on there has to be an easier way to tell what i have, i have the brembo break package, and i HOPE i have 3.73 gears. but i see people with the BBP and some have 3.55 and others have 3.73. so basically is there any TRUE way to tell what i have?
LuisV is offline   Reply With Quote
Join The Mustang Source

Join TheMustangSource.com Today - It's Totally Free!

Are you a Ford Mustang fan? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Ford Mustang Fans to meet online.
Once you join you'll be able to post messages, upload pictures of your stang, and have a great time with other Ford Mustang fans. Whether your an old timer or just bought your Mustang you'll find that TheMustangSource.com is a great community to join. Best of all it's totally free!

Join TheMustangSource.com Today! - Click Here JOIN FOR FREE


Old 6/5/11, 02:23 PM   #2
Cobra Member
 
LEwis26's Avatar
 
Join Date: January 8, 2011
Location: Chicago
Posts: 1,237
Thanks: 0
Thanked 0 Times in 0 Posts
It would be in your option list on your window sticker. If nothing is listed, you have the stock 3.31's.

Also, just a pet peeve of mine, but it's spelled BRAKE not break.
LEwis26 is offline   Reply With Quote
Old 6/5/11, 02:23 PM   #3
GTR Member
 
Ltngdrvr's Avatar
 
Join Date: February 18, 2010
Location: S.E. Texas
Posts: 4,990
Thanks: 0
Thanked 0 Times in 0 Posts
There is a tag on the axle housing that has the ratio on it.

If there is no optional gear ratio listed on your GT's window sticker then you have 3.31 rear gears if you have a manual transmission.

All automatic GT's have 3.15 gears as there are no optional ratios available for them.
Ltngdrvr is offline   Reply With Quote
Old 6/5/11, 02:37 PM   #4
Bullitt Member
 
Join Date: January 24, 2010
Location: fredneck county, MD
Posts: 313
Thanks: 0
Thanked 0 Times in 0 Posts
if there is any more confusion after the previous correct info is still not enough:

1. if you have a manual transmission the optional ring gears of 3.55 or 3.73 would show as a $395 option on your window sticker

2. if you have an automatic transmission the ring gear is 3.15 and no optional ratio was offered for that transmission
m4reapr is offline   Reply With Quote
Old 6/5/11, 02:43 PM   #5
V6 Member
Thread Starter
 
LuisV's Avatar
 
Join Date: June 2, 2011
Location: Fort Polk, LA
Posts: 65
Thanks: 0
Thanked 0 Times in 0 Posts
yeah i have the 6 speed manual. so if i have the 3.31 gear ratio, would it be wise to upgrade that if i make other mods to my car? the mods i plan on making are BOSS Intake Manifold, CAI (possibly Airaid or JLT), Tune, and Borla ATAK Exhaust. would a 4.10 ratio be a good investment?
LuisV is offline   Reply With Quote
Old 6/5/11, 02:52 PM   #6
Mach 1 Member
 
jaybertx's Avatar
 
Join Date: May 1, 2011
Location: Sarasota, FL
Posts: 671
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by LuisV
yeah i have the 6 speed manual. so if i have the 3.31 gear ratio, would it be wise to upgrade that if i make other mods to my car? the mods i plan on making are BOSS Intake Manifold, CAI (possibly Airaid or JLT), Tune, and Borla ATAK Exhaust. would a 4.10 ratio be a good investment?
Single best bang for the buck mod I have ever done to a car. Get the tuner first so that you can adjust the speedo afterward tho.

Don't fear the gear!
jaybertx is offline   Reply With Quote
Old 6/5/11, 03:24 PM   #7
GTR Member
 
Ltngdrvr's Avatar
 
Join Date: February 18, 2010
Location: S.E. Texas
Posts: 4,990
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by LuisV View Post
yeah i have the 6 speed manual. so if i have the 3.31 gear ratio, would it be wise to upgrade that if i make other mods to my car? the mods i plan on making are BOSS Intake Manifold, CAI (possibly Airaid or JLT), Tune, and Borla ATAK Exhaust. would a 4.10 ratio be a good investment?
Depends on what you want out of the car.

4.10 is a lot for a street car, would be good for the dragstrip.
Ltngdrvr is offline   Reply With Quote
Old 6/5/11, 04:27 PM   #8
Mach 1 Member
 
hahnsolo78's Avatar
 
Join Date: January 14, 2011
Location: minnesota
Posts: 594
Thanks: 0
Thanked 0 Times in 0 Posts
You could look under the rearend and there is a sticker stating the ratio on the pumpkin
hahnsolo78 is offline   Reply With Quote
Old 6/5/11, 07:42 PM   #9
Mach 1 Member
 
hawkeye18's Avatar
 
Join Date: April 20, 2010
Location: Norfolk, VA
Posts: 733
Thanks: 0
Thanked 0 Times in 0 Posts
hawkeye18 is offline   Reply With Quote
Old 6/5/11, 09:59 PM   #10
V6 Member
Thread Starter
 
LuisV's Avatar
 
Join Date: June 2, 2011
Location: Fort Polk, LA
Posts: 65
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Ltngdrvr

Depends on what you want out of the car.

4.10 is a lot for a street car, would be good for the dragstrip.
So 3.73 would be better for a street car?
LuisV is offline   Reply With Quote
Old 6/5/11, 10:24 PM   #11
Mach 1 Member
 
Join Date: October 14, 2010
Location: saskatoon
Posts: 700
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by LuisV

So 3.73 would be better for a street car?
I have 3.90s and a 5 speed and it was the best mod next to nitrous or boost for acceleration. But if you have a 6 speed you have that really low 6th gear.
Everett is offline   Reply With Quote
Old 6/5/11, 10:51 PM   #12
GTR Member
 
Ltngdrvr's Avatar
 
Join Date: February 18, 2010
Location: S.E. Texas
Posts: 4,990
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by LuisV View Post
So 3.73 would be better for a street car?
Like I posted, depends on what you are wanting out of the car.

3.73 is a OEM optional ratio so if you wanted, the dealer can flash your PCM for the new gear and you wouldn't need a tune.

4.10's and some sticky drag radials and a tune and it would be super fast at the strip.
Ltngdrvr is offline   Reply With Quote
Old 6/6/11, 01:31 AM   #13
V6 Member
Thread Starter
 
LuisV's Avatar
 
Join Date: June 2, 2011
Location: Fort Polk, LA
Posts: 65
Thanks: 0
Thanked 0 Times in 0 Posts
Yeah I need to do my research on the differences between the gear ratios. I'm thinking 3.73 would be good but since I want to get the boss manifold maybe moving up to 3.90 wouldn't be a bad idea.
LuisV is offline   Reply With Quote
Old 6/6/11, 03:36 AM   #14
V6 Member
Thread Starter
 
LuisV's Avatar
 
Join Date: June 2, 2011
Location: Fort Polk, LA
Posts: 65
Thanks: 0
Thanked 0 Times in 0 Posts
wow this website really simplified things for me. if anyone else needs more info on gear ratios (probably not since everyone answered a simple question of mine :P) and how they work, feel free to check this out. Thanks for all the help guys. i think i'll go with a 3.73 in the end.

http://www.mustangsplus.com/tech/axles/index.htm
LuisV is offline   Reply With Quote
Old 6/6/11, 05:07 AM   #15
Cobra Member
 
topbliss's Avatar
 
Join Date: May 14, 2008
Location: South Jersey
Posts: 1,136
Thanks: 0
Thanked 0 Times in 0 Posts
You don't have to climb under or locate your window stick to determine your rear ratio. Open the drivers door and look at the door jamb sticker under axle and the code will tell you what your car has from the factory

BB - 3.73 ratio
CC - 2.73 ratio
DD - 3.55 ratio
GG - 3.31 ratio
YY - 3.15 ratio
topbliss is offline   Reply With Quote
Old 6/6/11, 05:27 AM   #16
V6 Member
Thread Starter
 
LuisV's Avatar
 
Join Date: June 2, 2011
Location: Fort Polk, LA
Posts: 65
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by topbliss View Post
You don't have to climb under or locate your window stick to determine your rear ratio. Open the drivers door and look at the door jamb sticker under axle and the code will tell you what your car has from the factory

BB - 3.73 ratio
CC - 2.73 ratio
DD - 3.55 ratio
GG - 3.31 ratio
YY - 3.15 ratio
yeah i just looked at the sticker on my car. GG. how disappointing lol. definitely need to upgrade that.
LuisV is offline   Reply With Quote
Old 6/6/11, 09:43 AM   #17
Bullitt Member
 
freyke's Avatar
 
Join Date: January 9, 2005
Posts: 350
Thanks: 0
Thanked 0 Times in 0 Posts
VIN = "1ZVBP8CF0B5164662" Ok then what the heck is mine? I know it has the 3:73 because it's on the window sticker.
freyke is offline   Reply With Quote
Old 6/6/11, 10:05 AM   #18
Mach 1 Member
 
Modshack's Avatar
 
Join Date: July 15, 2010
Location: Greenville NC
Posts: 532
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by freyke View Post
VIN = "1ZVBP8CF0B5164662" Ok then what the heck is mine? I know it has the 3:73 because it's on the window sticker.
Huh? Trick question eh?

Last edited by Modshack; 6/6/11 at 11:30 AM.
Modshack is offline   Reply With Quote
Old 6/6/11, 10:50 AM   #19
Mach 1 Member
 
jaybertx's Avatar
 
Join Date: May 1, 2011
Location: Sarasota, FL
Posts: 671
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by freyke View Post
VIN = "1ZVBP8CF0B5164662" Ok then what the heck is mine? I know it has the 3:73 because it's on the window sticker.
Yours is 3.73.

BTW, what color is your Ingot Silver car?
jaybertx is offline   Reply With Quote
Old 6/6/11, 11:11 AM   #20
Member
 
Join Date: May 23, 2011
Location: In.
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
??

Quote:
Originally Posted by jaybertx View Post
Yours is 3.73.

BTW, what color is your Ingot Silver car?
The internet is just an amazing tool.
03sonic is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
What is this terrible sound coming from my rear axle? Rando 2010-2014 Mustang 15 9/30/15 12:28 PM
looking forward a good shop Airborne42 2005-2009 Mustang 0 9/24/15 10:27 AM
GT Premium Leather Seat Comfort? colt breaker GT 0 9/24/15 08:20 AM
Top Fall Mods at AmericanMuscle! AMAlexLazarus Vendor Showcase 0 9/23/15 12:10 PM
Need a Howto on Fan/Shroud Replacment - 05 GT GMAYS 2005-2009 Mustang 0 9/10/15 06:19 AM


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



All times are GMT -6. The time now is 11:07 PM.


2010, The Mustang Source