Help me please....

[Kingcater]

I used to have an 01 GT 5 Speed and now I have an 00 GT 5 Speed.....

Here's my issue, I don't remember the 01 turning as high of RPMs as this 00.

at 62-65 MPH im turning like 2500 RPMs and at 70-72 MPH I'm at 3000... I can't find a calculater that can let me know what gears I have. this car pulls harder than the other 01 I had. Thanks guys

 

[Crzyhrse]

I'm pretty sure you've got 4.10's.

 

[Mustang9668]

I punched in the numbers over on an internet calculator from another popular mustang forum and it came out to a 4.8XXXX ratio. I'm not sure how accurate that is though. I think 4.10's or 4.30's is probably right.

You could always jack the car up and put it on stands and then spin the wheel one time and count how many times the driveshaft goes around. That would give you a good estimate of what is in there.

 

[Kingcater]

I jacked it up, Spun the tire once and the driveshaft rotated 4 times.

 

[Rusty67]

Sounds like you've got 4.10:1 gears. That would explain why the car feels like it pulls harder and why you are noticing an increase in your RPMs at the same MPH.

 

[blurred10]

I thought it's supposed to read about 80mph at 3000RPMs with 4.10s. At least with a t45.

Tranny specs:
http://www.miracerros.com/mustang/2000_specs.html

Calculate:
http://www.car-videos.com/tools/speedrpm.asp
Or this:
http://www.allfordmustangs.com/Detailed/608.shtml

 

[5spd GT]

4.10's or 3.90's are possible...try to be a bit more accurate when you do the test to see which one...

More than likely it is 4.10's...they are a more widely distributed gear.

 

[Tim2002GT]

That sounds more like 4.30's to me. I've got 4.10 with a tremec 3650 and i'm only turning 2400 @ 70 mph. I know my overdrive is steeper than yours, but not by that much.

 

[Kingcater]

I am actually at 25-2600 RPMs at 70, sorry about that

 

[Tim2002GT]

I am actually at 25-2600 RPMs at 70, sorry about that

Then yeah, those are 4.10's.

 

[COramprat]

Then yeah, those are 4.10's.

Agreed. My car is at the same RPM"s at 70...3 grand at 80.

 

[Kingcater]

Awesome....one less part to buy now I can save for either the mongoose or kb kit....

 

[blacksheep-1]

You could just pull of the cover and count teeth, or look at the serial number, many end (or have written into the gear somewhere) the gear ratios or number of teeth. That way you'll know for sure, all it will cost you is some posi gear lube and a tube of silicone.
BTW here's another calc so you can compare with the others.
http://reiderracing.com/rtech_engineRPM.htm
http://www.race-cars.net/calculators...alculator.html click on calculators
http://reiderracing.com/rtech_tiredia.htm
and since you're considerring a blower:
http://www.superchargersonline.com/hp_calculator.asp

 

[tank_567]

I really think 4.10s are in that car. I have 3.73 with t45 I'm about 2500 around 70mph.

 

[Crzyhrse]

Their needs to be more posts saying their 4.10's.