tire size is a problem

[mikel]

Yeah, your U9000 has been converted to a U7137 now.

We will be adding Durango 5.7 to the tool soon, but it is not in there yet.

The 9r04 revision is a good idea, for some reason I thought this tool was already updated to the latest.

[speedy912]

i'mmmmmmmmm baaaccckkkk. Loaded 04 revision last evening. Today pluged tool in. It went through the boot up and accept condition stuff. Came to menu and I chose "quick adjust." As I tried to continue the screen read - Error reading "tire size" parameter. Same old story. I am willing to try any reasonable suggestion and maybe stupid suggestions. What I am not willing to do is accept "That is the way it is, live with it."
If there is any chance this is a tool malfunction I am willing to sent it in for inspection and if needed repair.

[mikel]

Do you have the ABS module hooked up int he car from the swapped vehicle?

Any other modules besides the PCM?

[speedy912]

No. Just the PCM. I question why tool needs tire size or why lack of tire size stops me. Maybe it is not all that important and can be eliminated. Can you ask the engineers? I can almost hear you thinking "just change the transmission." I went to a lot of work to use the 5 speed with overdrive. Remember I'm using a Strange 60 rear with 4.56 gears. I don't know where else to go for more expert help. Any chance you can suggest other forum to ask about this problem. Possibly one or more of your dealers has encountered this.

[mikel]

There should be no reason to 'have' to adjust tire size here, it should not be stopping you from installing the tune.

[Quick]

That could be the problem??? speedy912 said he went into QA and got the error that it couldn't read tire size. Sounds like you guys poll all the parameters in QA for current value when you enter that section on the Predator? and it quits if it fails to get any of them? Is it going to be the same in modify parameters? or do you read everything out of the tune file that's already uploaded (original backup)

[speedy912]

Installing engine tune is not a problem. I like what can be done with custom engine tunes. This car main diet is 100 octane avgas. Only occasional few gallons 93. My problem is making any change to the transmission. Because there seems to be other custom installations without problems I have to wonder if there is a problem in the tool I have. Getting beyond that and still wanting a stronger transmission behind a great performing engine my question becomes, Can a Diablo dealer or Diablo Company supply a tune for the transmission that I can install? Maybe installing a custom transmission tune would bypass the problem. If that is a possibility, please point me in the right direction. I am not interested in a custom engine tune. I have one I like. Of course for right now the standard factory tune is in place so that I could do the 04 update yesterday. Only thing I did today was try to change transmission and finding out that did not work took less than five minutes. I have another controller done by B&G Chrysler Specialists with good (not great) engine performance and great transmission performance but cannot be modified without losing the B&G tune. I'm not willing to sacrifice that until I have a total improved package from Diablo.

[mikel]

If you can flash the engine tune, then it flashes the trans tune, I am not sure how you mean it only does the engine and not the trans?

[speedy912]

Fresh start. Diablo pluged into car ignition on. Menu - choose performance tune. Choice of Diablo tunes or modify stock tune. I choose "modify stock tune" menu reads Factory hourspower stock tune setup for use with custom and I press continue. Menu gives choice of Modify parameters and I select "Modify Parameters"
First on list is Idle speeds and all adjust without problem.
Next is rev and speed. Again these adjust without problem.

Next is tire size and tool reads "error reading tire size parameter" so no adjustment entered.

Next is wot fuel, able to adjust all engine speeds without problem.
Next wot spark, again able to adjust all engine speeds without problem.

NOTE, only thing missing is tire size parameter.

This program will load and modify all but tire size parameter. Please note there has been no change in transmission settings. I find shift points, shift firmness and reduction of torque management should be possible through Quick Adjust parameters. So I try quick adjust and here comes the "Error reading tire size parameter. Tomorrow, Saturday September 5, I will attach this tool to a 2003 dodge full size pickup truck factory equipped with 5.7 hemi. I will report results. Thanks, speedy.

[Quick]

So when you adjust everything in modify parameters (except tire size) can you load the tune to the car? I think you said you could.

The tire size is only going to effect the speedometer reading. Are you hung up on that?

[speedy912]

Yes. That is exactly what I did. I was able to change parameters with exception of tire size and load the program. Real strong engine and wimp transmission. Speedometer is not the problem. In "adjust all parameters" and "quick adjust" where I should be able to make changes to transmission the tool is hung on "error tire size parameter." I cannot get past it. As as custom installation I have electronic speedometer reading a signal from transmission. I do not have a speed sensor. If I should decide to change rear axle ratio recalibration of speedometer is easy. What I want to convey to Diablo through Mikel is I am willing to do what necessary to get past this problem even if it is necessary to purchase a transmission tune directly from Diablo or dealer. What I want is easy to say and that is Maximize all shift points, shift firmness and line pressure. Remember, Mikel has been telling me of many custom installations without this problem. I doubt if any custom installation is equipped with speed sensor. I cannot positively state there iis a problem with the tool and Mikel cannot be completely sure there is not. Maybe tomorrow test on factory installation will be of help.

[Quick]

I still don't understand. Maybe it's because my old crom U7135 doesn't have the same parameters as yours but...

If the only thing you can't change is the tire size then how does that effect anything? How would it be different if you could change the tire size? Mike said if you can flash the engine tune then it is flashing the trans tune. I don't think there are any parameters in QA that are not in the Modify Parameters section. So if you modify parameters and then flash/write the tune to the car you've got everything you're going to get (except tire size). Did I miss something here?

[speedy912]

What I failed to say - Evidently the adjustments to transmission are behind the "adjust tire size parameter" When I try to enter "adjust tire size parameter" tool reads "error reading tire size parameter" and I cannot get to past the error to enter transmission adjustments. I have not tried and maybe I should try entering a 93 octane tune. However, that is not what I am after. I make the assumption a 93 tune is for 93 octane fuel with standard engine. My engine is not standard and fuel is 100 octane low lead aviation gas.

Thanks, speedy

[speedy912]

More- When using the B&T Chrylser Specialist modified computer all shifts low speed low rpm or high speed high rpm are much sharper. By not being able to get to the transmission adjustments and with custom tune entered the shifts are so soft they can barely be felt. Not what I expect for a performance engine in front of the transmission. Failed to mention previously also have a increased stall speed lock up converter from RAGE installed.

Speedy.

[Quick]

B&T ? You mean B&G? That's not doing anything to the transmission control module. The sharper shifts you are feeling is due to torque management being reduced in the PCM tune. I don't think you have any options for that in the Predator. You could get that with a CMR tune. Tuner with the CMR software makes you a custom tune that you can then flash to the car with the Predator.

Again, I'm just guessing, but there aren't any parameters "behind" other parameters.

You get to a menu list of parameters and each one is individual. So if you did get manage to get into tire size there wouldn't be anything "behind" that selection. You could enter your tires size and that's it. Enter tire size and return to the list of parameters. So if you can modify the parameters in the list above tire size and you can modify the parameters in the list below tire size then I don't think you're missing anything except for tire size.

but... I've never seen the menu or parameter list available for the Rams.