Shift Points with MTCM

[cd36]

So I am getting a MTCM for my 5.7 Chrysler 300, but I am not upgrading any of my valvetrain so I don't want to up my rev limiter in my car to take advantage of the increased shift points on the MTCM (stock shift points are ~5800, MTCM ups that to 6200RPM 1-2 and 6400RPM for the rest).

Am I able to use the predator to drop my shift points back down to 5800RPM with the MTCM once I install it? Thanks!

[mikel]

Hmmm.....

[cd36]

So did I either ask a stupid question, or the first to ask the question?

If it makes a difference its a 2006.

[mikel]

First to ask that I have seen, not sure I have an answer.

[cd36]

Ok Thanks, I'll have to try to do some more digging, or else just play with it once everything shows up, I just don't want to brick my Mopar TCM once I get it. If you come across any info on it I would appreciate it, thanks.

[fireman2118]

You will not "brick" your MTCM if you follow this installation procedure.

This is from Johan.....AKA diablotoona

Ok since many of you are using this combo and there is a lot of misleading information on this subject i would like to clear it out for you guys using this.
*The only times you can hose (set back to stock) a mopar tcm are under the following conditions.
1/ You let the Predator take a backup with the stock tcm in and restored the backup or restore quick adjusts with the Predator.
2/You do a "force re-learn variant" procedure, this is rather uncommon but it will set it back to stock settings regardless if you took a backup with the stock tcm or mtcm installed.

So to properly use an Mopar tcm in your vehicle with the predator please follow the basic guidelines.
*With stock tcm still installed, restore your original backup.
*Install mopar tcm
*let the predator take a new backup and use as normal.

Follow these steps and you will be fine and never hose your mtcm.

NOTE: Firmer shifts using the mopar tcm will not do anything as it already uses that setting for the shift firmness.

I personally have two vehicles with this tcm as well as Predator/Trinity on them and i have verified all this to be correct.

I think the biggest mistake people have been doing is to not restore their original backup before installing the mtcm and thus allowing the Predator to read the new tcm string settings that are in the mopar tcm.

As far as setting the shift points down to stock settings, I've heard that you can. As long as you follow the install procedure above, you will not brick your MTCM.


To find more information, search MTCM on LXForums

[cd36]

Thanks, I have seen that before on LXForums, but no one ever mentions anything about lowering shift points on the MTCM with a predator, so I wasn't sure what would happen, if anything.

It seems to me like a logical answer to the issue of the MTCM running higher shift points than a stock valvetrain can handle, but there must be a reason why it isn't recommended more often?

[cd36]

http://www.lxforums.com/board/showthread.php?t=224561

See this thread I started on LXForums, general consensus is that you can't, but the wrong information has been posted before (only a few responses). I figured I would come straight to the source and ask Diablo, but they don't seem to know either. There was just a group buy on LXForums on the MTCM, so I imagine these questions are going to start coming up alot now that people are actually receiving them.

[fireman2118]

As long as you've installed the MTCM as Johan states, you should at least be able to try knocking the shift points down without adverse effects to the MTCM.

Thanks, I have seen that before on LXForums, but no one ever mentions anything about lowering shift points on the MTCM with a predator, so I wasn't sure what would happen, if anything.

It seems to me like a logical answer to the issue of the MTCM running higher shift points than a stock valvetrain can handle, but there must be a reason why it isn't recommended more often?

It's probably not mentioned more often because the MTCM was never meant to be used in a vehicle that didn't at least have an upgraded cam installed to allow for higher RPMs

[cd36]

Thanks I'll give it a shot. If I remember correctly though in the predator to get 5800RPM shift point, you don't actually select "5800 RPM", but the only option is to "return to stock" which is usually 5800 RPM.

And I know it is made for a cammed vehicle to take advantage of the higher shifts. I just can't stand how my car shifts right now, and wanted to try and make it work before I throw a cam in. Thanks for your help.

[mnunes]

When I sent Johan this same question, his response is that "return to stock" shift points returns it to the shift points that were learned when the original tune was saved and the canned tune was loaded. In this case, it's going to return you to the 6000rpm shift point that's "stock" for the MTCM, not the shift point that was stock for your stock TCM.

I'm very interested in lowering my shift points, too, since I don't have the engine work required to take advantage of the 6000rpm shift point.

[cd36]

I was worried that the "return to stock" setting would do that. I wonder if its possible for them to put a 5800RPM option in, for people with a MTCM that want to retain stock shit points.

Would a CMR tune have any more flexibility in this as well?

[CountWilhelm]

Let me try to understand and distill what I have read...remember, I am a novice to this all, but with a fast car made much faster with a 91 octane cai diablo predator tune:

If I already have the latter tune on my car and add a MTCM the MTCM will sense the install and set the points to the proper settings (with the tune settings intact) despite the change is settings from stock to the new MTCM settings had I not done the predator tune in the first place?

In other words, is the issue whether the MTCM does its job with the predator tune in and if so, is it worth the cost? Those that have the MTCM with predator tune: is it worth it?

Thanks...learning, slowly but surely...old as dirt but still kicking and speeding...

[CountWilhelm]

As per my previous post re: MTCM...I was referring to the: Mopar Performance Transmission Controller Upgrade LX TCM P5153332 ID:P5153332...is this what is being discussed...I am considering buying/installing it...I have been told it was formulated to take out the performance glitches in the 2006 Charger R/T, which I own...before I installed the 91 oct cai tune, the shifts were soft and sloppy and I knew I was losing torque gain and power at the shift points...since the install the shift is exponentially better but could be imroved...the question for me is: am I better of installing the MTCM, ensuring that the predator tune will accept it and its inherent enhancements or rather to play with the shift points etc within the predator program itself...Diablo guys...if you can answer this to my satisfaction I am inclined to install the module and leave the 91 oct tune as is...thanks for an excellent discussion!!