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GT500 - which gears?


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#1 OFFLINE   darksnake

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Posted 18 January 2011 - 01:09 AM

'08 GT 500 gearing - what would you say are the best overall GT500 rear gears, 3:31, 3:55, or 3:73's and why? I currently have 3:31's, looking for something quicker without sacrificing highway mileage too much.

#2 OFFLINE   428cj

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Posted 18 January 2011 - 01:47 AM

'08 GT 500 gearing - what would you say are the best overall GT500 rear gears, 3:31, 3:55, or 3:73's and why? I currently have 3:31's, looking for something quicker without sacrificing highway mileage too much.

373 are great gears for the gt500 the clutch chatter that comes with a high performance clutch is gone and it drives alot better and pulls alot stronger and in 6th gear at 70 mph is only turning 2100 rpm I went on a trip this summer with805 hp and 80 lb injectors 373 gears and still got 19.8 mpg . gt500's should have all came with 373 gears . 428cj

#3 OFFLINE   UnleashedBeast

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Posted 18 January 2011 - 03:17 AM

agreed, 3.73 is the best choice for a street car. I have a set about to go in myself, and can't wait to eliminate clutch chatter.

You should gain in town mpg due to less throttle required to overcome the weight of the car.

Edited by UnleashedBeast, 18 January 2011 - 03:20 AM.


#4 OFFLINE   VTWLKWY

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Posted 18 January 2011 - 03:24 AM

bingo....373's.. the perfect gear!...Pete

#5 OFFLINE   Ray Lucca

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Posted 18 January 2011 - 06:46 AM

I'm getting ready to make the switch, and it looks like the 3.73's are the sweet spot. What kind of pricing are you guys getting quoted for the install, parts and labor??? I currently have the FRPP Tune with the Pro-Cal Tuner. Can that be used to adjust the speedo. for the new gears??? Thanx!

#6 OFFLINE   Light66

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Posted 18 January 2011 - 07:02 AM

I'm getting ready to make the switch, and it looks like the 3.73's are the sweet spot. What kind of pricing are you guys getting quoted for the install, parts and labor??? I currently have the FRPP Tune with the Pro-Cal Tuner. Can that be used to adjust the speedo. for the new gears??? Thanx!


If you have the Procal version two hand held unit (the blue unit with an LCD screen), the speed can be adjusted for the new gears.

#7 OFFLINE   Ray Lucca

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Posted 18 January 2011 - 10:39 AM

Thanx, that is the Pro-cal I have. Trying to get some pricing now on the FRPP 3.73 gears installed.

#8 OFFLINE   UnleashedBeast

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Posted 18 January 2011 - 10:44 AM

Thanx, that is the Pro-cal I have. Trying to get some pricing now on the FRPP 3.73 gears installed.


Buy them from Tousley Ford Parts for 132.00 + shipping. Best price you will find on them. You will also require an install kit. (about 127.00 for the FRPP version)

Then find a reputable shop to install them.

#9 OFFLINE   b17drvr

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Posted 18 January 2011 - 10:54 AM

373's are great! Don't fear the gear.

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#10 OFFLINE   darksnake

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Posted 18 January 2011 - 11:33 AM

Thank you all for your input. A good group as usual! I like the sounds of the 3:73 as well. As they put them in the KR's and Supersnakes for a reason :doh:

Edited by darksnake, 18 January 2011 - 11:34 AM.


#11 OFFLINE   1badsho

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Posted 18 January 2011 - 12:07 PM

having had both 373's and 410s ..... my opinion is this :



I think it depends on your driving habits and what your using the car for. I have 410s and dont regret them ..... You really get use to the quickness off the line ... the easy rolling starts that 410 gears give u ... its alot easier on your clutch too.

Down side is rpms and gas mileage .... if you plan to do any substanial highway driving I would go with the 373's .... either gears you will need a programer to calibrate your speedo. All 07 and 08 and 09 models came with the 331 gears ..... so if you go to a ford store looking for a factory tune with 373 gears ..... for your shelby ... it wont happen

Any gear change will require a programmer ..... which most people have anyway ... hope this has helped

Don

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373 gears

 

 

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#12 OFFLINE   1badshelby

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Posted 18 January 2011 - 03:25 PM

I did my own 373 swap and love them, but on a recent road trip I lost about 2 mpg from the same trip made before. Guess I need to just slow down a bit eh?

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#13 OFFLINE   shelby001

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Posted 18 January 2011 - 03:41 PM

With 4:10`s you must be shifting quickly between 1st & 2nd.

#14 OFFLINE   SSSNAKE

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Posted 18 January 2011 - 04:26 PM

Yes, 373's. It will give you the added benefit of eliminating the dreaded "cruising speed drone" that you get from some aftermarket mufflers (read Borla). Best all around gears IMO.

#15 OFFLINE   09Troublemaker

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Posted 22 January 2011 - 04:12 PM

Yes, 373's. It will give you the added benefit of eliminating the dreaded "cruising speed drone" that you get from some aftermarket mufflers (read Borla). Best all around gears IMO.



373's work really well . love mine


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#16 OFFLINE   GT500Tow

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Posted 22 January 2011 - 06:15 PM

I'm not going to tell you what gears are best for you. Because it depends on your driving style and rear tires size. If your going to run bigger tires. Then they should play a roll it what gears you have installed. Stock 27 inch tires compared to 28 inch tire. Is a big difference in final gear ratio. I've been running tires 28 to 29 inches tall. 373 gears just wasn't enough gear. It was like driving a car with 3.60 gear. I tried 4.10's. Killer gears for racing with 28 inch tires. That's if you are going to race a lot and your 1/4 mile times are the most important. I ended up with 3.90's. With a 28 inch tire JMHO. Its the best gear for street strip with 28's. Makes the car very easy to drive. No slipping the clutch or over rev on take off. Still gets good fuel mileage [22] MPG high way. Also a very good racing gear. Technically i do run 3.76 gears. Because of the 28 inch rear tire's that i run. I may run a 4.10 if i get a bigger tire at some point. Guys that run 4.10's with 28's. Are running about a 3.95 final drive gear ratio.
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#17 OFFLINE   1badsho

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Posted 22 January 2011 - 06:51 PM

With 4:10`s you must be shifting quickly between 1st & 2nd.




no not really .... just lots of smoke :happy feet:

Don

07 GT500 1ZVHT88S275367748 purchased 04/06/2014

TVS 2.3 blower / 2.5 pulley

VMP twin jet 67mm TB

off road x pipe

373 gears

 

 

SOLD BUT NOT FORGOTTEN
07 RED SHELBY W/WHITE STRIPES VIN # 1ZVHT88S175275241:RELEASED FROM PLANT 11/14/06 : RAILCAR NUMBER 11/30/2006 : ETA DELIVERY DATE TO MY STORE OF 12/08/2006

CURRENT MODS:

- VMP Stage II TUNE
TUNE 1 PERFORMANCE
TUNE 2 HWY/ECONOMY

- 448hp stock at the rear wheels
- 553hp Stage II at the rear wheels
- KR mufflers and H pipe
- 410 gears
- Steeda LCA

CURRENT OTHER RIDES:

1999 F-350 CC drw 7.3 diesel ... 08/01/2010 ....144000 miles .... just broke in :)

1990 Taurus SHO rebuilt from the ground up by yours truly

 

Montana 36' 10th aniversary edition 5th wheel ( my style of roughing it ! )

PAST RIDES:

2007 Shelby GT500
1989 TRACK PREPPED SHO
1991 SUPER CHARGED SHO +

2013 Boss 302


#18 OFFLINE   jerseygator

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Posted 23 January 2011 - 02:49 AM

With 4:10`s you must be shifting quickly between 1st & 2nd.


As a matter of fact I have 410's in my Rubicon. It is so short between shifts that I take off in 2nd gear, unless on a hill.

My SVT certified mechanic says 373's are the best gears for the stock tires on our cars. Getting mine in the spring. Can't wait. :happy feet:

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#19 OFFLINE   SteelTownStang

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Posted 23 January 2011 - 07:48 AM

As soon as the hibernation period ends, I'm going w/ the 3.73s...

Edited by SteelTownStang, 23 January 2011 - 07:48 AM.

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#20 OFFLINE   BAD500Chris

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Posted 23 January 2011 - 09:01 AM

having had both 373's and 410s ..... my opinion is this :



I think it depends on your driving habits and what your using the car for. I have 410s and dont regret them ..... You really get use to the quickness off the line ... the easy rolling starts that 410 gears give u ... its alot easier on your clutch too.

Down side is rpms and gas mileage .... if you plan to do any substanial highway driving I would go with the 373's .... either gears you will need a programer to calibrate your speedo. All 07 and 08 and 09 models came with the 331 gears ..... so if you go to a ford store looking for a factory tune with 373 gears ..... for your shelby ... it wont happen

Any gear change will require a programmer ..... which most people have anyway ... hope this has helped



^^^ This

I have 4.10s and they rock. (And I still get 22mpg on the highway)
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#21 OFFLINE   CodyWayne718

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Posted 26 May 2012 - 11:24 PM

Old thread I know. I'm good at that. Trying to find the 3.73s on tousley and this is all I can find http://www.tousleyfo...ponent=GEAR KIT

Is that what I need? It doesn't say what ratio they are so I assume stock.

#22 OFFLINE   2010KonaBlueGT

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Posted 27 May 2012 - 04:48 AM

Old thread I know. I'm good at that. Trying to find the 3.73s on tousley and this is all I can find http://www.tousleyfo...nent=GEAR%20KIT
Is that what I need? It doesn't say what ratio they are so I assume stock.



No, this is what you need:

P/N: M-4209-88373

Description: 8.8" 3.73 Ring Gear And Pinion

http://fordracingpar...tKeyField=13230

Call Steve or Mike at Tousley and order that part number along with a Installation kit, listed on the above page.

The instructions are also linked on the page I provided the link to.


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#23 OFFLINE   wingsnut

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Posted 27 May 2012 - 06:05 AM

At stock power level 3:73's are great, just be prepared to spend some coin to get it to hook if you add goodies under the hood. As stated above and nobody really believes me when I tell them I am getting just as good if not better fuel mileage with TVS, VMP tune and 3:73's as I did completely stock.

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#24 OFFLINE   SSGT500

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Posted 27 May 2012 - 07:22 AM

The first mod that I did to my 07 GT500 was a 3.73 gear. That's probably why I'm still on the original clutch. I was very disappointed that Ford built these cars with a 3.31 gear. Then they wondered why they had clutch problems. Since changing the gears, I've gone to a smaller tire that gives me an effective 3.90 ratio. That feels really good. The car is easy to launch on the street and feels great on the track. My favorite place for FRPP parts is Buy Ford Racing.com. They have 3.73s for $139 including shipping.
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#25 OFFLINE   rdrawkit

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Posted 27 May 2012 - 03:26 PM

All purpose gear is the 3:73...Great with stock set-up or stage 1/2 setups....So easily to drive and great on the highway .....I'm running stock wheel size and nitto 555 all around....no complaints....

#26 OFFLINE   Albino500

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Posted 27 May 2012 - 04:22 PM

3.73:1 are the way to go IMO. The important thing is to buy the installation kit also and take it to the installer - if they say that they don't need it - RUN don't just walk away !
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#27 OFFLINE   frazierfreud

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Posted 28 May 2012 - 07:00 AM

I've considered 3.73 gears. Just worried about traction. I hook nicely with drag radials with my stock 3.31 gears. I am just concerned that I couldn't floor it in second gear without losing traction. Plus, I am considering going with a regular street tire instead of drag radials...this would probably assure me of not keeping traction with a 3.73
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#28 OFFLINE   rdrawkit

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Posted 28 May 2012 - 01:16 PM

Traction and 3:73 gears can be a problem...I learned how to feather the launch with nitto tires and 2nd grabs very nicley and I'm gone....

#29 OFFLINE   CodyWayne718

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Posted 01 June 2012 - 04:54 PM

Would this install kit be alright?

http://www.americanm...moinkit8re.html

Or should I get the one from the above post for the 2012? The one at AM is just so cheap...... get what ya pay for, I know. That's why I'm asking first :-) Thanks

#30 OFFLINE   CodyWayne718

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Posted 01 June 2012 - 08:04 PM

I've got the feeling that's not the install kit I need. Is it? There's like 5 different install kits!




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