I stand corrected, and relieved to know this. You must admit it's counterintuitive.

 

That settles it for me..DAXO is the flash that everyone wishes they could go back to.

 

Thanks Vic for the info. Your response affirmend that the gears must be change.

 

Very true, but a firm shift does not produce a clunk!

 

More or less the point I was trying to make by sending him back to the other thread he created. He didn't specify the size of his new tires, only his 8" lift.

There were tons of replies to the thread I quoted that cover the gear ratio changes required along with some personal experience with the larger size tires.

In any case the SC tuner is going to help, but as you say, it won't make up for the significant effective change in gear ratios he's going to see when he changes to the new larger tires.

 

If theres slop in the drive shaft (some trucks are worse than others), it most certainly may clunk.

 

I don't know how that gave you this conclusion but I seriously doubt it....

DAX0 is a disaster.
It doesnt put down good stock numbers and the drivability is HORRIBLE...cold start is terrible, it surges, etc...

The later files Ford used to replace it put down more power (stock and modified) and don't have the issues of DAX0.

 

Vic is there any way you could make a list of flashes & programs that will work with the SC programer so some of us newbie to 6.0's knows what will work, my truck is an 03 with the oct flash, all the talk of DAXO this and that can get a little confusing,

 

It seems your information is error.
Mine is a DAXO. Most have been reflashed before the people knew what was happening. It has the piliot injection. It gets 17-19 MPG stock. It puffs a little smoke at cold start. The engine drives perfectly. It has the original tow mode that works like everyone wants. It has no dead pedal.
I have been told on other threads It makes more horsepower than later flashes. I have not verified that but I intend to.
With My Predator Installed it in the 100 HP Mode it made made 387 HP and 703 Ft Lb of torque The dyno sheet is on my gallery.
That was an increase of 113 HP over the stock trucks which were making a 275 HP at the wheels.

We have been able to save this flash to disk using the Prredator interface. I am making this flash available to anyone who wants it.
In the 65 HP economy mode, it drives perfectly and gets 19 MPG hwy driving 70 MPH
Those are the true facts.

 

Unfortunately much of the information I have is held proprietary by my employer but I'll share what I can.

Choc Bob, you may have had good luck with DAX0, but many have not.
I have considerably more information than this, but here is all I can (am allowed to) share about DAX0:

I literally did a full compare of DAX0 vs other common codes and the DAX0 is simply not a good tune (yes, I specifically know why but will not get into specifics about which values are different and how this affects the tune). It may get great mileage but it has drivability issues, and some of this may depend on what ambient temp/humidity/altitude your truck normally operates in. I've seen trucks run HORRIBLY stock with DAX0 and run great after an update.
There were some other pilot injection codes that drove well, but DAX0 has been known to have problems and this is why Ford has now superseded it several times.
The bottom line here is that pilot injection is not supported.

There is a reason why DAX0 beame DAX1, then TEC1, then TEC2
TEC2 is a great flash,gets great mileage and makes crazy power on the tune.
Drivability with TEC2 is top notch.

If you have a DAX0, you will NEED to get an update before installing the 1704.
You won't be disappointed =o)

 

TEC2 is also breaking the 700 FT LB mark after tuning (unlike the 04 strategy trucks that are making 630-640).

 

I think I will stick with my tune. There is no way to get TEC2 from a dealer. They only flash with the current flask. I am satisfied with 387 HP/ 728 Ft lb.

 

Does TEC1 or TEC2 = October flash for 03 and early 04 trucks?

 

Vic
Although my truck says DAXO on the computer it has been reflashed to "3U7A FTC" in Jan. How does this one do with the 1704??

Bob

 

AWSOME! Thanks Vic

I was reading some of the previous posts on "firm" shifting vs. "harsh" shifting. The best way to describe mine would be a little too firm at lower speeds in econ mode. I don't want to cause pre-mature trans wear by allowing excessive slip, but I also don't want to cause any problems with "firm" shifts in the long run either. My tranny never "clunked" it was just a little too firm at lower speeds as compared to stock and as compared to the Tow and Performance mode. The other tunes did not have the "firm" shift at lower speeds as did the econ mode.

You mentioned that you needed to know the options on my truck so here it is.

04 F250 Crew Cab, FX4 with 04 motor.

My RA# is 14189

I trust you will make the appropriate adjustments. It must be very difficult to re-tune the shifting based off a customers perception.

I also have difficulty understanding how my factory settings on another truck will drive like mine when it has been stated over and over that every truck is different.

Since I do not "perceive" the shifting to be harsh at lower speeds in the Tow or Perf mode, I imagine that these settings are correct and would not produce pre-mature wear due to slippage and still provide the performance required for the tune.

On another note: The firm shifts I experience vary in "force" prceived from time to time depending on how fast I push down on the excelerator pedal. If I press the pedal slow, you will feed the shifts a lot more than if you pressed it quick. This is where it is too firm for my liking, it will jerk the truck, but not cause any "clunk" or the tires to chirp.

I hope I have provided you with enough information for my particular problem.

Thank you for taking the time to post on these forums, and thank you for the great service you are providing us with the 1704.