Transmission "learning" how you drive

[gfh77665]

I have read several posts about the trans having a learning curve, getting to understand how you drive. Can someone expand more on that? It seems to me if that's the case, then the trans is fooled if you follow the owners manual during the break in period. If you perform the brisk acceleration / deceleration cycles during the break in, does the trans re-learn normal driving patterns afterwards? Or does it somehow "lock in" what it first learned during the break in?

 

[Dan98]

I feel like it's always taking readings and adjusting. A short trip to town won't mean much. City driving a every day or highway that is what its going to adapt to. Or its just b.s.

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[Fast69Mopar]

The adaptive memory of the TCM and the trans comes from the CVI's, or Clutch Volume Index. This is a measurement of how much fluid it takes to apply a particular clutch. The harder you drive the truck the more fluid the TCM will allow to apply the clutch. The easier you drive the truck the less fluid it takes to apply a clutch.

 

[OCDTech]

I have read several posts about the trans having a learning curve, getting to understand how you drive. Can someone expand more on that? It seems to me if that's the case, then the trans is fooled if you follow the owners manual during the break in period. If you perform the brisk acceleration / deceleration cycles during the break in, does the trans re-learn normal driving patterns afterwards? Or does it somehow "lock in" what it first learned during the break in?

I don't know the actual truth, but i feel, it learns constantly, when i first bought my truck, i drove it spirited for a bit, then i quit and started driving easier. It seemed to still want to hang in the gears for a while after that. Then eventually it returned to normal. Felt to me like it was trying to cater to my driving style.

 

[gfh77665]

The adaptive memory of the TCM and the trans comes from the CVI's, or Clutch Volume Index.

So, it continues to be adaptive as the miles and years go by? In other words, it refreshes itself continually?

 

[Fast69Mopar]

So, it continues to be adaptive as the miles and years go by? In other words, it refreshes itself continually?

Yes, you are correct. It is continually adapting to your driving habits.

 

[CheechDogg.0n37s]

So I just regeared and I have now noticed a hard downshift when coming to a stop. Is this the re-learning the system is going through now ?

 

[crackerjack1957]

So I just regeared and I have now noticed a hard downshift when coming to a stop. Is this the re-learning the system is going through now ?

Might need to change gear ratio in BCM if you haven't already.

 

[CVX20]

I have read several posts about the trans having a learning curve, getting to understand how you drive. Can someone expand more on that? It seems to me if that's the case, then the trans is fooled if you follow the owners manual during the break in period. If you perform the brisk acceleration / deceleration cycles during the break in, does the trans re-learn normal driving patterns afterwards? Or does it somehow "lock in" what it first learned during the break in?

IMHO just ignore the break-in period and drive it like you always would.I drove both of mine like I stole it from day one.Well lets just say I didn't baby either one of them.

 

[CheechDogg.0n37s]

Might need to change gear ratio in BCM if you haven't already.

Did change it ...

 

[WY.Ram]

Did change it ...

I didn't really notice any change when I set my new ratio in the BCM did you?

Also I THINK pulling power from the truck for a short time period resets the learned behavior and might get that hard shift to dampen out sooner.

I think I definitely notice a change in tranny behavior when I reload the pcm tune. (Same tune just reload it). I do believe Jay modified several of the tranny parameters that were available to him, and it could be some of that which are giving me the feel of a reset. Wish I knew more about the intricacies of my Hemi powerplant drivetrain (without f it up first, which is what I sometimes do)


'16 PWagon with a badass Greene tune feed'n & fire'n 6.4L with 6spd // 5.13 AAM // 37" KM3, -12mm // DOR, Purple Cranium // CAI, ARH, Solo Mach44 // z36, EBC // Custom Graphics, AVS, 4% VLT // Morimoto, Rigid, Diode Dynamics // Alfa, Diablo //.................

 

[crackerjack1957]

Did change it ...

I was told mine was changed also but after getting HPtuners I found out it wasn't......went back to confront tech that said he had changed.....they didn't have an answer......got a refund & will not go back to them ever.

 

[WY.Ram]

I was told mine was changed also but after getting HPtuners I found out it wasn't......went back to confront tech that said he had changed.....they didn't have an answer......got a refund & will not go back to them ever.

Main question - did you notice a difference in your trans behavior after you changed your gear ratio setting?

Were you able to view and modify your BCM with your HP Tuner tool?

I've been thinking about an switching to an HPTuners unit for their increased functionality. I didn't realize they accessed the BCM as well.

'16 PWagon with a badass Greene tune feed'n & fire'n 6.4L with 6spd // 5.13 AAM // 37" KM3, -12mm // DOR, Purple Cranium // CAI, ARH, Solo Mach44 // z36, EBC // Custom Graphics, AVS, 4% VLT // Morimoto, Rigid, Diode Dynamics // Alfa, Diablo //.................

 

[crackerjack1957]

Main question - did you notice a difference in your trans behavior after you changed your gear ratio setting?

Were you able to view and modify your BCM with your HP Tuner tool?

I've been thinking about an switching to an HPTuners unit for their increased functionality. I didn't realize they accessed the BCM as well.

'16 PWagon with a badass Greene tune feed'n & fire'n 6.4L with 6spd // 5.13 AAM // 37" KM3, -12mm // DOR, Purple Cranium // CAI, ARH, Solo Mach44 // z36, EBC // Custom Graphics, AVS, 4% VLT // Morimoto, Rigid, Diode Dynamics // Alfa, Diablo //.................

I was told by a well known tuner that my 1st & 2nd gear WOT was loosing my 6500rpm shifts on this 65rfe because the BCM gear ratio needed changing from 3.55 to 4.56
Come to find out it was something going on with trans tune.......tuner Matt Glad @ Petty's Garage solved.

And yes HPtuners will change gear ratio & tire size without license on a Ford or Dodge

 

[CheechDogg.0n37s]

Well ALFAOBD changes the 4.88 setting in BCM right?

Sent from my SM-N960U using Tapatalk

 

[crackerjack1957]

Alpha has its quirks to me.....if it reads a gear ratio & you change it......then next time you open Alpha... it should have the change if it works.
I will use Alpha if I don't have another choice but prefer other options.

 

[WY.Ram]

Well ALFAOBD changes the 4.88 setting in BCM right?

Sent from my SM-N960U using Tapatalk

Yes, AlfaOBD changes the gear ratio in the BCM, and to my knowledge, (which isn't all knowing for dang sure), the BCM is the only place in the control system where the gear ratio is entered / listed.

Anytime I make a change, I too go back in and verify that the change was accepted and the setting has the new value. (Especially when it seems to have no effect) I've checked my gear ratio four or five times.

I follow the "best practices" the guys have documented in the AlfaOBD thread for controller backups and I compare everything I change. Even once or twice I compared everything I didn't change. All for That very reason, something can be quirky, can-bus network, Android OS, AlfaOBD app, or All three, not sure but the last thing anyone of us needs is to be tweaking settings for some improved system performance and end up with a real good looking brick.

'16 PWagon with a badass Greene tune feed'n & fire'n 6.4L with 6spd // 5.13 AAM // 37" KM3, -12mm // DOR, Purple Cranium // CAI, ARH, Solo Mach44 // z36, EBC // Custom Graphics, AVS, 4% VLT // Morimoto, Rigid, Diode Dynamics // Alfa, Diablo //.................

 

[RamCares]

So I just regeared and I have now noticed a hard downshift when coming to a stop. Is this the re-learning the system is going through now ?

Hello CAG,
I certainly understand your concerns. If you are not able to remedy the concern based on the advice provided here, we kindly recommend reaching out to your servicing dealer as they will have the appropriate tools to answer your question. If you decide to go this route and need additional support throughout that process, please know we are available.
Laura
RamCares