2000 GT - Does my car have stock gears?

jayrw · Jan 29, 2009

So I'm trying to figure out if my car has the stock gears in it or possibly 3.73's ,I bought the car off the lot (Carmax) a little over a year ago, when you pop the hood it looks bone stock, no cold air intake etc. and it has stock exhaust, ive always assumed no engine work or other mods have been done.

I had the clutch replaced with a Centerforce dual friction and found out the previous clutch wasn't stock and was actually a Luke clutch (had chattering problems).

The reason I'm wondering if the car might have higher gears is it seems im beating other mustangs that I shouldn't be? For example I raced a 06 GT that had a cold air intake and a tune yet I beat him off the line and he never caught me. We raced twice with the same results, when I race GT's in my stock HP range (99 - 04) I haven't lost to any of them either, in fact one time I missed 2nd gear (grind!) and still managed to catch up and pass the car.

The car pulls really hard in first gear, is it possible to tell what gears im running by the MPH vs. RPM? I'm running the stock tire & rim size (17")

Any info appreciated!

stangnutlx · Jan 29, 2009

Easiest way to find out is to pull the rear cover count the teeth and do the math. Thats really the only way to tell for sure

Nightstick · Jan 29, 2009

How many rpms is the engine turning at 70mph in 5th gear?

Tazzy · Jan 29, 2009

Jack it up in the rear and see how many turns on the drive shaft it takes to turn the wheel one revolution.

SaleenGT2001 · Jan 29, 2009

Tazzy said:
Jack it up in the rear and see how many turns on the drive shaft it takes to turn the wheel one revolution.

thats the easy way to do it

crazystang25 · Jan 30, 2009

ya at about 80 mph though with 3:73 you should be turning somewhere between 2700 and 3000 rpms. my speedo sticks but it should be around there i jus know cause thats my cruising speed on the highway.

eliteJAE · Jan 30, 2009

Factory freak if not gears?

Mustang5L5 · Feb 1, 2009

Sucky driver's in the other cars?

Smokeurhonda · Feb 2, 2009

Tazzy said:
Jack it up in the rear and see how many turns on the drive shaft it takes to turn the wheel one revolution.

jayrw · Feb 3, 2009

Thanks for the replies Ill have to try jacking up the car and also check my rpm/mph as described by crazystang25. Been super busy lately sorry for lagged response.

248a · Feb 3, 2009

Mustang5L5 said:
Sucky driver's in the other cars?

+1

bhuff30 · Feb 4, 2009

Or just check the RPMs at 70 or 80mph and we can tell you what gears you have. I have factory 3.27s and run 2500 at 80mph, compare from there.

crazystang25 · Feb 4, 2009

ya so with 3:73 you should be at or close to 3 grand.

Smokeurhonda · Feb 4, 2009

I have 3.73 and run 2500 at 80mph. What gives?

Smokeurhonda · Feb 4, 2009

Ah maybe the differnt trans

LastCallRacing · Feb 4, 2009

I whipped this together real quick, hopefully it finds some usefulness for you.

I've calculated these all out assuming:
245/45/17 tires and OD/5th gear of .67

If your tires are a different size, or you have a different transmission like a T56, these values will vary slightly, but maybe print this out and whip it out one day if you're not able to do the other (proper) method the guys suggested.

-Patrick

Code:

[FONT="Fixedsys"]
rpm----3.27------3.55------3.73------4.10------4.30----
-------------------------------------------------------
2000---69.74-----64.24-----61.14-----55.63-----53.04---
2500---87.18-----80.30-----76.43-----69.53-----66.30---
3000---104.62----96.36-----91.71-----83.44-----79.56---
3500---122.05----112.43----107.00----97.34-----92.82---
4000---139.49----128.49----122.29----111.25----106.08--

[/FONT]

crazystang25 · Feb 4, 2009

ya so 3.73 is about 2700 rpms at 80 roughly

jayrw · Feb 4, 2009

LastCallRacing said:
I whipped this together real quick, hopefully it finds some usefulness for you.

I've calculated these all out assuming:
245/45/17 tires and OD/5th gear of .67

If your tires are a different size, or you have a different transmission like a T56, these values will vary slightly, but maybe print this out and whip it out one day if you're not able to do the other (proper) method the guys suggested.

-Patrick

Code:

[FONT="Fixedsys"] rpm----3.27------3.55------3.73------4.10------4.30---- ------------------------------------------------------- 2000---69.74-----64.24-----61.14-----55.63-----53.04--- 2500---87.18-----80.30-----76.43-----69.53-----66.30--- 3000---104.62----96.36-----91.71-----83.44-----79.56--- 3500---122.05----112.43----107.00----97.34-----92.82--- 4000---139.49----128.49----122.29----111.25----106.08--

[/FONT]

Very cool thanks! according to this data im running stock 3.27's , im right around 2000 rpm @ 70mph (running 245/45/17 tires).

I guess the verdict is better shifting on my part? lol

This makes me want to actually do the gear upgrade now, ill just have to debate on 3.73 or 4.10's

Thanks for all the replies!

(Shot I took tonight):

cw5billwade · Feb 5, 2009

crazystang25 said:
ya so with 3:73 you should be at or close to 3 grand.

If the spedo was not fixed with a tuner than wouldn't the car still think that the RPM and MPH to be the same but you would be going slower?

mat82284 · Feb 5, 2009

cw5billwade said:
If the spedo was not fixed with a tuner than wouldn't the car still think that the RPM and MPH to be the same but you would be going slower?

My car actually came with 3.73 gears and i didnt know it did. I always thought i was driving slow on the freeway, like my speedo said 80 but i was going the same if not at a slower speed than the traffic and i kept thinking, wow i highly doubt everyone is driving 90+ on the freeway. So later that day i noticed one of those police things that tell you how fast your going and i noticed my speed off by 10mph. You can do it this way or jump on the freeway with a friend and talk to each other from your cell phone and see what your friends speed is compared to yours. Either way works.

2000 GT - Does my car have stock gears?

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