2020 Redeye shifting hiccups

[2fast4u]

^^ This says Alfa Romeo Giulia....not the L series platform of Dodge?

 

[NJ_Redeye]

i must have gotten a wrong number, apologies

 

[DGatzby]

So @DodgeCares here is a print of that STAR whatever. I have a pretty good Dodge connection at my dealer. We got this info today.

You let us know how this relates to these three pages of discussions of REDEYE shifting hiccups please.

 

[DodgeCares]

^^ This says Alfa Romeo Giulia....not the L series platform of Dodge?

Hi 2fast4u,
This is correct. The TSB number was not for Dodge vehicles.

Rob
Dodge Cares

 

[DodgeCares]

So @DodgeCares here is a print of that STAR whatever. I have a pretty good Dodge connection at my dealer. We got this info today.

You let us know how this relates to these three pages of discussions of REDEYE shifting hiccups please.

Hi DGatzby,
When looking up transmission shudders, "hiccups", in our internal service system, we can see this STAR case as a potential resource. Transmissions have factory programing that is calibrated to stock wheel/tire size. We understand that some members of this thread don't have stock wheels/tires.

Rob
Dodge Cares

 

[Phast Hemi]

I have not. I will try sport mode and a custom mode. The reason why I run in track mode is because it turns the fan on. I have a 2020 widebody and can turn the chiller on in any mode but in the 19's it only turns on in track mode.

The factory chiller disengagea at WOT and above 4k RPm. Having the stock redeye suspension in track mode won't allow proper weight transfer and will just cause traction issues.

 

[DGatzby]

So where are we? Stock 305/35 hiccup and miss just as bad if not worse than wider with the same diameter.

 

[DodgeCares]

So where are we? Stock 305/35 hiccup and miss just as bad if not worse than wider with the same diameter.

We recommend visiting your dealer for a diagnosis. If you would like, you can follow up with us via PM for help while working with your dealer. What we can do is escalate a case on your behalf so that one of our Case Specialists could work alongside your dealer to find a potential solution to the concerns you’re currently experiencing.

Rob
Dodge Cares

 

[DRAGRCR]

Hoping the flash works. I did read somewhere that there is some sort of TSB for a flash for it. And I forgot to ask the service guy at my last oil change . The only thing is if it helps then why didnt DRGRCR ever get it resolved? He went to the ends of the earth chasing it to no avail. Not convinced that the flash will fix it yet.

I did get it resolved. I sold it. FCA including my inside connections said it was operating as designed.

I did NOT sell or trade in the Super Stock because of the shift hiccup issues. I traded it because I wanted the other car more.

It took a while but I finally figured out what was making the Super Stock hiccup.
I am no expert, but David said a little more operating pressure might fix it. This is what I think is happening in my Super Stock when I had it. Data Logs did not show an over rev. Whenever I had a greater LOAD on the trans it would hiccup. If I understand this correctly the car commands a shift and then it starts looking at shaft speeds and it expects them to come together at a certain rate and in a certain amount of time. If that does not happen, the TCM sends a signal to the engine to reduce torque. That is the hiccup. My Frostbite RedEye was severely hitting the rev limiter But I was still told that more operating pressure might have fixed it. Higher operating pressure would make the trans shift harder and faster possibly eliminating the hiccup. By satisfying the shift logic and eliminating the torque management from kicking in or possibly by pulling the RPM down away from the rev limiter.

Or you can tell it to shift sooner or raise the rev limiter etc......

My Super Stock would definately hiccup when the Transmission LOAD was higher and it worked perfect with reduced load.

Things that increase load: Lower DA (power increase), more vehicle weight, Taller tire, better track prep

 

[DRAGRCR]

I will try to go lower in pressure and will keep ya updated.

Uhm......He wants you to go UP in pressure. Somehow a harder tire that is less pliable/forgiving with a smaller footprint will hook better.

 

[DGatzby]

I did get it resolved. I sold it. FCA including my inside connections said it was operating as designed.

I did NOT sell or trade in the Super Stock because of the shift hiccup issues. I traded it because I wanted the other car more.

It took a while but I finally figured out what was making the Super Stock hiccup.
I am no expert, but David said a little more operating pressure might fix it. This is what I think is happening in my Super Stock when I had it. Data Logs did not show an over rev. Whenever I had a greater LOAD on the trans it would hiccup. If I understand this correctly the car commands a shift and then it starts looking at shaft speeds and it expects them to come together at a certain rate and in a certain amount of time. If that does not happen, the TCM sends a signal to the engine to reduce torque. That is the hiccup. My Frostbite RedEye was severely hitting the rev limiter But I was still told that more operating pressure might have fixed it. Higher operating pressure would make the trans shift harder and faster possibly eliminating the hiccup. By satisfying the shift logic and eliminating the torque management from kicking in or possibly by pulling the RPM down away from the rev limiter.

Or you can tell it to shift sooner or raise the rev limiter etc......

My Super Stock would definately hiccup when the Transmission LOAD was higher and it worked perfect with reduced load.

Things that increase load: Lower DA (power increase), more vehicle weight, Taller tire, better track prep

Yep. Entirely on the money correct. We knew that. I am not waisting my dealer’s time.

 

[Detroitboy]

My 21 Charger RE does it too just as described

 

[Jon-MooredPerformanceLLC]

My 21 Charger RE does it too just as described

Rip to Simon above. But If remember correctly he solved the issue stock by playing with tire pressure. It’s been a minute since I thought about this issue but it has to do with the load on the vehicle and it not shifting when it should. Typically, a standard trans and engine tune takes care of this. But if looking to stay stock I’d start there if you haven’t already.

 

[DGatzby]

@Detroitboy have ^^^^ this guy @Jon-MooredPerformanceLLC tune it.

He did my 2019 Redeye last year. Besides never feeling that hiccup, delay, skip, or whatever that car did and all the others do, he fixed a few other items old Dodge sold to us that inhibits its performance. In my case maintaining the stock configuration with severe road course duty became impossible. Because of inadequate OEM equipment to function as they represent it will, we “fixed” it.

That car with an expected consistent 800+hp now is fun!

 

[Detroitboy]

With street tires I have been told the problem is that the tires are spinning and the computer has no parameters for that condition, so there is a lag in the shift.
But I'm running M/T 305 45x17 at 18 psi on a prepped track. I cannot tell if they are spinning after leaving the line. My best 60 ft is 1.51. I am still trying out different settings for my custom mode. I am getting some wheel hop occasionally that I cannot figure out and I have the DIRS diff support. M/T reps said to increase my tire pressure to 20 lbs but I have not been to the track since to try that out.

 

[Jon-MooredPerformanceLLC]

With street tires I have been told the problem is that the tires are spinning and the computer has no parameters for that condition, so there is a lag in the shift.
But I'm running M/T 305 45x17 at 18 psi on a prepped track. I cannot tell if they are spinning after leaving the line. My best 60 ft is 1.51. I am still trying out different settings for my custom mode. I am getting some wheel hop occasionally that I cannot figure out and I have the DIRS diff support. M/T reps said to increase my tire pressure to 20 lbs but I have not been to the track since to try that out.

If you are getting hop that is a good sign to increase tire pressure. Many members on here run over 20psi. If you are on really good prep then yes 20 to 21 psi. If I was you try the 19.5 - 20 range to start and adjust from there.

As for custom settings
trans track
suspension street
traction sport

 

[DodgeCares]

My 21 Charger RE does it too just as described

Hello @Detroitboy

Thank you for bringing this to our attention. Our team would like to assist you. Please private message us, so we can take a closer look.

Gia
Dodge Cares

 

[Detroitboy]

With street tires I have been told the problem is that the tires are spinning and the computer has no parameters for that condition, so there is a lag in the shift.
But I'm running M/T 305 45x17 at 18 psi on a prepped track. I cannot tell if they are spinning after leaving the line. My best 60 ft is 1.51. I am still trying out different settings for my custom mode. I am getting some wheel hop occasionally that I cannot figure out and I have the DIRS diff support. M/T reps said to increase my tire pressure to 20 lbs but I have not been to the track since to try that out.

Oops....that picture was my street custom setting. My dragstrip settings are:
Trans - track
paddle - on
traction - sport
susp - street
steering - street

 

[Lime Cat]

Subscribing

 

[DGatzby]

Sorry. Dodge fixing the hiccup we have (us with afternarket tunes - past tense) all experienced is about as likely as them also fixing your wheel hop.