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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

 darksnake, on 18 January 2011 - 01:09 AM, said:

'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

 Ray Lucca, on 18 January 2011 - 06:46 AM, said:

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

 Ray Lucca, on 18 January 2011 - 10:39 AM, said:

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
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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

 SSSNAKE, on 18 January 2011 - 04:26 PM, said:

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

 shelby001, on 18 January 2011 - 03:41 PM, said:

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



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

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      TUNE 1 PERFORMANCE
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- 448hp stock at the rear wheels
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- 410 gears
- Steeda LCA

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#18 OFFLINE   jerseygator

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Posted 23 January 2011 - 02:49 AM

 shelby001, on 18 January 2011 - 03:41 PM, said:

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

 1badsho, on 18 January 2011 - 12:07 PM, said:

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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