auto and gears

[scott2001GT]

I have a 2001 Mustang GT AUTO. My next mod will me gears I know for sure. But idk which ones. 4:10s or 4:30's. I will not do 3:73's or lower or 4:56's higher. It's thoughs 2 I can't decide between. It's a weekend car and I pretty much only do dig races. some rolls at times. The track is once a year. But I want the best punch. I am concered with top speed. I want atleast 120 and I will be doing a SCT x3 tune with a custom tune. Do you have or knowanyome with a 4R70W 99-04 GT that runs 4:30's?(auto)

Thanks alot

Scott

[97LaserRed]

auto=4.10s!!

[pRojekt02GT]

I wish I could help a fellow 4R70W'er..I'm almost certain you have 3.27's, right?..I'm a bit stumped myself on gear choices, I was told 3.73's since I drive it daily but..I'm sure someone will chime in.

[scott2001GT]

yes that is stock. but I need more lol idk! I want to make the right choice

[scott2001GT]

so i comt to you's for help

[2001GTTT]

4.10s definitely. thats what you want.

[pRojekt02GT]

3.73's for an everyday driver though, right?...

[97LaserRed]

3.73's for an everyday driver though, right?...
in a v6 auto ...YES! it will rev out to fast with 4.10s. the gt's redline higher tho so you can get away with 4.10s in a auto gt

[pRojekt02GT]

in a v6 auto ...YES! it will rev out to fast with 4.10s. the gt's redline higher tho so you can get away with 4.10s in a auto gt

What rev's out faster w/ the 4.10's, a V6 or the 4.6?

[97LaserRed]

What rev's out faster w/ the 4.10's, a V6 or the 4.6?
any car will rev out faster to shift to 2nd and so on. the gt redlines higher so it will take longer for the shift so you stay in the power band a little longer. in a v6 since it redlines at 5k you will go through the power band to fast

[scott2001GT]

the v6 will

[2001GTTT]

What rev's out faster w/ the 4.10's, a V6 or the 4.6?

the sixxer

[scott2001GT]

but 4:30s would be badass.....................

[scott2001GT]

but idk about top speed

[97LaserRed]

your cruiseing speed at 65 would be like 4500 rpm?? maybe 5000?? idk with 4.30s

[scott2001GT]

with O/D off maybe i am not sure. arond 4500 I think. but I am wondering on top speed as well.

[2001GTTT]

theres a certain GT on this board with 4.10's that goes well in excess of 170mph...oh yea...bolt on car only.

[laz2447]

auto - 4.10's
5spd - 3.73's

[pRojekt02GT]

auto - 4.10's
5spd - 3.73's


Way to clear that up. I asked Brian the form of that question almost twice, lmao, and it never really got answered.

[Slow01GT]

4.10's in the auto for a daily and 4.30's for a track whore. I had 4.10's in my 01 gt auto and daily drove it for 3 years. Also I could still hit around 130 in 3rd with the 4.10's so top speed really isn't an issue.

[thebreeze72]

i have ford motorsport 4.10's new in the box for an 8.8 i was asking $150.00 make me an offer and pick em up asap and try them out you won't be upset with your choice. call dave 724 - 425 -1911:goodidea:

[scott2001GT]

4.10's in the auto for a daily and 4.30's for a track whore. I had 4.10's in my 01 gt auto and daily drove it for 3 years. Also I could still hit around 130 in 3rd with the 4.10's so top speed really isn't an issue.

wow great info man! thanks alot!

and I don't have 150 at the time lol sorry! but thanks!

[Inkdcountryboy]

4:30's FTW!!

[scott2001GT]

4:30's FTW!!

but not the top speed

[pRojekt02GT]

Really, Dave? I might have to take you up on that if you got them within the next couple of weeks..Just trying to recover lol.

[Inkdcountryboy]

scott you can come over ill take you for a ride in my 01 gt with 4:30's

[Slow01GT]

Honestly 4.30's wouldn't lower the top end too dramatically over the 4.10's but I still think thats a little steep for a daily driver with the auto. 5 spd I would say go for it.

[scott2001GT]

it's only a weekend car. I need 120mph atleast. and idk if a none F.I 2V with pull 4:30's all that well. I live it STL Lol

[scott2001GT]

scott you can come over ill take you for a ride in my 01 gt with 4:30'

auto?

[Inkdcountryboy]

5spd

[scott2001GT]

oh well man that doesn't help!

[pRojekt02GT]

..at least he tried..lol

[Troll]

http://www.allfordmustangs.com/Detailed/608.shtml

here's a link to a calculator. It uses a 5-speed, but your AOD is a 1:1 Ratio in 3rd gear (not OD).

you can play around with it, but looks to me like 3.90's will put you at 120mph at 6,125 RPM.

hope this helps. :goodidea:

edit: I see you're not concerned about the 3rd gear at 1:1.

I don't know what the OD factor is on an auto, but you can plug in different numbers for the 5th gear on that calculator.

Even with a 4.56 at a .80 OD, you'd be 120mph at 5,7xx rpm.

I'd say you'll be fine with 4.30s.

[pRojekt02GT]

Now that you got me playing with it, I feel kinda like a dumbass, but can't figure it out...


:dunno:

[Troll]

enter your ratio, enter the speed, then hit "calculate"

down below, it gives you the RPM for each gear at that speed.

[pRojekt02GT]

:rotflol:


LOL..

[Slow01GT]

The ratios for the 4R70W are:
1st = 2.84
2nd = 1.55
3rd = 1
4th = .70
Hope that helps a bit

[steve-O]

Im about to go pick up my auto with 4.10's from SLP. Ill let ya know what its like

[steve-O]

alright, got my car back. has good punch off the line with the 87oct tune, and great punch off the line on the 93oct tune (sct X3) cruises at 2600rpm @70mph. still hits 110mph in 3rd gear, same as with the 3.27 gears which i thought was kinda wierd

[White5.0]

4.30s

[scott2001GT]

ya i would liek to know Steve-o! great info guys. Idk if a stockish 2V will pull 4:30's to well. I am getting a tune though.

[scott2001GT]

so Steve-o you know you can do more than 120 with 4:10s?

[steve-O]

so Steve-o you know you can do more than 120 with 4:10s?

not in 3rd gear unless ya got taller tires. 4th gear (o/d) will prolly hit 140 with the 4.10's...Ill find out next month

[scott2001GT]

I need to know with O/D off so when I race lol great info man 1st hand is nice to know!

[Slow01GT]

With my limiter bumped up to 6500 I know I could hit at least 120 in 3rd with my 4.10's