No "shift firmness" in the U7137

[mikel]

The only ones that do not have shift point controls in the tool are 03 and most 04s. All 05-up have full TCM support currently.

[need-a-cage]

Increasing shift firmness is the main reason that I ordered one of these. If the canned tunes don't firm it up enough, I sure hope they add this to the list of adjustable features!

[mikel]

Like I have been saying, dont knock it till you try it.

Setting upthe tune on the PCM side properly makes for a much better shift feel.

We have never added line pressure to an SRT8 car, but if you know how they shift with our tunes, you know they dont need no stinkin line pressure!

[07ELECBLUE]

Mike,

I received my 7137 yesterday. The MDS feature is well worth it. My truck finally will hold full lockup on the interstate. But I notice that shifts aren't firm, but it does shift faster. I have an 07 and I put it on 87 tune due to the fact I had a half of tank of 87 in it. I remember that you said right before they shipped out that the 07s and 08s would chirp the tires from 1 to 2. Do I need to change some settings for that?

[mikel]

No, we saw that from the canned tune.
Give it a few miles to relearn everything, and then try the 93 tune with some good gas.
It is possible that the little bit of extra power int he 93 tune is enough to get that 1-2 chirp...

[07ELECBLUE]

Thanks for the response Mike. I will give it a whirl when I fill up again.

[need-a-cage]

Like I have been saying, dont knock it till you try it.

Setting upthe tune on the PCM side properly makes for a much better shift feel.

We have never added line pressure to an SRT8 car, but if you know how they shift with our tunes, you know they dont need no stinkin line pressure!

Sorry Mike, I will just shut up and wait until I try it. I was just going by others saying they wanted it to shift harder, but I read another guy saying they are good. If it gets close to chirping the tires then I will be satisfied. I just keep reading on all these sites while I wait for mine to show up. Since I can't be out testing it I am stuck behind the computer reading about them.

Anyway, I wasn't knocking it, just saying that IF I wasn't satisfied it would be nice to be able to adjust it. However, even if it does feel perfect, I would like to be able to screw with shift firmness to see if I can make it feel better for my tastes whether it is firmer or softer.

[Black05Hemi]

If you want it to shift harder, buy a Sharadon Stage III Valve Body...People think this tuner can completely change everything

[need-a-cage]

My main issue with the stock shifting is the TM portion and the fact that it closes the throttlebody during the shift. Just getting rid of that will make me happy, I think. I definitely don't need to go as far as getting a different valve body.

[HemiHorsePower]

I'm very happy with this tool, just went around warren county twice, and used i65 as my dynometer, thanks innovate, had to pull off a few exits here and there for the 3 wot fuel adjustments but with great success !! Ive never heard it growl like that coming out of 3rd at wot with so much engine to spare!!
sure, i wrote to the tcm and limped around, but i read the posts and returned to stock then went back to 93 without touching the tcm .
i just was wondering when you will get the tcm to correctly accept the transmission tunes, as well as firmess in the 2006 models, i know a few other members were having the same problems,
not a big deal, i already have trans-g0, and do concur with the shift is not that firm as it is fast, which is good in its own way,
i cant say how nice it is not to fall on my face coming out of 3rd wot anymore.
the tool was worth the wait in my opinion, the benefits of performance outway the side effect of touching the tcm, ,,, for now, i know there will be an update to fix this. one thing i like is the tunes do not modify idle, so i can have the good street behavior while stopped, and smoke tires when i stomp it. its very intimidating.

[SuperchipsFan]

I experienced no problems writing to the tcm with 91 tune on an 07.

[HemiHorsePower]

sc fan, what parameters do you have with your tool , can you just adjust shiftpoints, and can you adjust firmness too, when you adjust shiftpoints, does it inadvertently increase shift pressure?
HH

[HemiSilva]

If you want it to shift harder, buy a Sharadon Stage III Valve Body...People think this tuner can completely change everything

Thanks for your suggestion BUT, after reading the improvements the LX guys were getting in their shifts I was expecting a LITTLE more, that's all! This is a great tool, I'm not complaining.......

[Quick]

On the LX's the NAG1 has a couple of presets. The PCM initializes the TCM with one of them. The 5.7L uses a different TCM "mode" than the 6.1L. The Predator has a shift firmness setting for the 5.7L which allows you to put the TCM in the 6.1L "mode". Which makes the 5.7L shifts firmer. There is NO firmness setting for the 6.1L SRT8s. Then the Predator allows you to raise the shift points. On the 6.1L it's either raised or not, on the 5.7s you have a couple of shift point settings (max power/performance on the 5.7s happens to be with the stock shift points). The shifts will feel like they're firmer at the raised shift points but I think that's more a matter of perception since there's more noise with the engine revving a bit higher etc. -- and some due to being more into the power band on the 6.1Ls. Finally, the DS tunes reduce torque management a bit which also makes the shifts feel harder since there is less torque reduction during the shift.

So... less torque management means less effective ESP (when you have it full on -- don't know if the trucks have ESP) and some people don't want that. Less torque management also means you can very distinctly feel the MDS kicking in and out if you're using that on the 5.7Ls. So there are tradeoffs for firmer shifts.

If you get a CMR tune you can have your tuner reduce torque management as much as you like to where you have to wear a kidney belt and things start breaking. DS tries to put out a generic tune that they think is going to make the most people happy. It's going to be a compromise between raw performance and streetability for daily drivers and not break anything in a short amount of time. Outside of that you have the option of a CMR tune. I'm sure they'll be tweaking things as they get feedback too.

[Mike_Levy]

Then the Predator allows you to raise the shift points. On the 6.1L it's either raised or not,

Thats only the LX's. The Grand Cherokee has no such option. We're stuck with it just how it is, and can't rev much beyond 6100rpms.