Info, Why the New St feels Quicker !!!!!

[Todd Z]

OK after some research beceause I was reading the Test drive post I found this!!!!!

The New st has a totally re geared transmission. So you don't even need the 4.10 rear. the 3.73 will do the job. on the v6 and the 3.55 on the v8!!!



The current ST has transmission gears of (1)2.47 (2)1.87 (3)1.47 (4)1.00 (5)0.75

So with a 4.10 rear and a 2.47 first gear the FINAL drive in FIRST is 10.127:1



THE NEW st V6 is (1) 3.22 (2) 2.29 (3) 1.54 (4) 1.00 5(.71)

So with the 3.73 Rear 3.22 First gear Final is 12.016



You have to see the v8 It has a 4.17 first gear with the 3.55 rear thats FD of 14.8 !!!!!!!!!



THAT is HUGE difference and WILL make the truck more responsive and feel like it has a lot more HP and torque...



Just something to ponder



Todd Z

 

[shawn stonbraker 2]

Good info Todd. it makes sense now. Thanks.

 

[P M]

That explains a lot. It definitely takes off quicker, but once at a given speed, additional acceleration feels the same as the current ST. When I say quicker, I just mean that if you use the throttle the same way as the current ST (partial throttle) when starting to roll off a light or something it is quicker to go. Thanks for the info. I wonder if there are any other changes to the tranny?

 

[Tim Turner]

You forgot to mention the weight addition of about 400lbs.

It'd be insignificant and negligible with the new gearing and would outweigh the additional weight.

 

[P M]

The change of gearing should result in a reduction of a few hundred RPMs at highway speeds. Probably trying to salvage every bit of MPGs out of it. Hopefully that doesn't force it to kick down every time you need to accelerate. Hmm, something else to try on a test drive... The V8 will really be turning lower RPMs on the highway, but it's got the torque to deal with that I assume.

 

[Stephane Bolduc]

Not sure if it relates, but since I had a code resetted, I lost a lot of power (seat of the pants of course). I think it depends on the way you drive. When I'm sitting at a red light, I'm once of those guys who floors it when it turns yellow on the other side.



It took a few months, but somehow, the truck "learned" the way I accelerate and I always had good power ahead of me; regardless of the current speed and gear. I also try to make good use of the overdrive switch.



Needless to say that I have poor gas mileage, but like I said many times; if gas mileage was a concern, I would have never bought a truck (or is it SUV ...).



I lost all that last month; but it sure is fun to "train" it again.



All this to say that : maybe it's more than just transmission changes, they might have made the computer program better.

 

[Ben Poche]

re: Just test drove an 07 ST!!!!!!!!!!!!!! by bpoche,3/1/2006 15:31 ET



the trany gear is most likely different

you confirmed what i thought thanks Todd

 

[Richard L]

Todd,

Good info. That should put LaRue's critics to shame.



...Rich

 

[Todd Z]

You have to see the v8 It has a 4.17 first gear with the 3.55 rear thats FD of 14.8 !!!!!!!!!

Yes it is Q..

Todd Z

 

[troy malone]

the v8 has a 6 speed auto just like the regular explorer



troy

 

[Tom Schindler]

I have a Truck Trend Magazine that says the 2001 Sport Trac does 0-60 in 9.1 seconds.





Tom

 

[Chris Kulbaba]

Can you put the new tranny in an 01-05?

 

[Todd Z]

Chris I am looking into that , THE 5r55S is in the 03 and up regular explorer, My tranny guy tells me it is different, BUT through some research, I will see How different it really is..

Todd Z

 

[Gypsy me]

Todd Z you are da man! Good info, and such a nice guy too

 

[Larry Phillips]

Let us know if it'll bolt up.

 

[Gerald Pierce]

Q spewed:

I believe the v8 has different gearing as well.

after ToddZ wrote:

You have to see the v8 It has a 4.17 first gear with the 3.55 rear thats FD of 14.8 !!!!!!!!!

DUH!



Thanks for the info Todd. Wonder if they are adjusting the gearing to take some strain off the tranny?