1-2 shudder at WOT

[Bosscav]

Don, it's all about the pressure in the 1-2 shift. Quite a few guys are developing that anomaly now. Not a problem, just an inconvenience. I'm glad Anthony and Dan were able to help you.

[SHOdded]

Bosscav, didn't you say the pressure was dropped from 250 to 200 by LME?  So, wasinger, I hope that 25% cut makes the cut for you.

[Brucelinc]

How much is the stock pressure?  Don, did LME set your 1-2 shift pressure to the stock setting or something higher? 

[AJP turbo]

How much is the stock pressure?  Don, did LME set your 1-2 shift pressure to the stock setting or something higher?

Stock is about 150-175 I'll look when I get home I can't remember exactly...it doesn't take  a lot to make a noticeable difference...the pressure smoothly increases with the amount of torque commanded and with rpm...so at wot and at 6500 rpm in the table is where the values are highest.

And all the tables for each gear is different...the 2-3 part throttle pressures are way higher than the other gears at part throttle..not sure why ford did that so I lowered mine to what the other gears are and it shifts smoothly after a reflash so the adaptive doesn't have much to learn...also it seems that the higher gears can tolerate more pressure at wot than the 1-2 shift...don't ask me why

[wasinger3000]

How much is the stock pressure?  Don, did LME set your 1-2 shift pressure to the stock setting or something higher?

Stock is about 150-175 I'll look when I get home I can't remember exactly...it doesn't take  a lot to make a noticeable difference...the pressure smoothly increases with the amount of torque commanded and with rpm...so at wot and at 6500 rpm in the table is where the values are highest.

And all the tables for each gear is different...the 2-3 part throttle pressures are way higher than the other gears at part throttle..not sure why ford did that so I lowered mine to what the other gears are and it shifts smoothly after a reflash so the adaptive doesn't have much to learn...also it seems that the higher gears can tolerate more pressure at wot than the 1-2 shift...don't ask me why

I wish I know what it was at now and what the number actually represents. Is it 200 psi? Or just some kind of reresentarive number... I used my x4 to lower it by 25% of what I don't know... it's better still but for some reason after 4 or 5 wot runs the car goes back to the shudder shift. Like it enjoys being stupid...

I asked Torrie to change the shift pressure last night at 2am and I woke up to a new tune haha. Love that service!

So I'll see how it does now.

[AJP turbo]

Yeah pretty sure it's psi...I'll look at the units when I get home....wasinger I hate the global modifiers that u can do on the device..I'm not really sure how they are applied to the tune..personally I prefer to change the values in the actual tables but u would need the software and the tune in mtf format which most tuners won't give u anyway..so in ur case ur doing what u can...it's really not cost effective to have the software and pay a tuner for the mtf,assuming he will even give it to u, unless u enjoy tinkering and learning to tune...much cheaper to just buy a tune from lms or torrie

[BiGMaC]

How much is the stock pressure?  Don, did LME set your 1-2 shift pressure to the stock setting or something higher?

Stock is about 150-175 I'll look when I get home I can't remember exactly...it doesn't take  a lot to make a noticeable difference...the pressure smoothly increases with the amount of torque commanded and with rpm...so at wot and at 6500 rpm in the table is where the values are highest.

And all the tables for each gear is different...the 2-3 part throttle pressures are way higher than the other gears at part throttle..not sure why ford did that so I lowered mine to what the other gears are and it shifts smoothly after a reflash so the adaptive doesn't have much to learn...also it seems that the higher gears can tolerate more pressure at wot than the 1-2 shift...don't ask me why

I wish I know what it was at now and what the number actually represents. Is it 200 psi? Or just some kind of reresentarive number... I used my x4 to lower it by 25% of what I don't know... it's better still but for some reason after 4 or 5 wot runs the car goes back to the shudder shift. Like it enjoys being stupid...

I asked Torrie to change the shift pressure last night at 2am and I woke up to a new tune haha. Love that service!

So I'll see how it does now.

Hope this tune works to stop your problem...
The problem ajp points out is also complicated by the learning nature of the ECU and other modules... likely why your stutter got better and then the  problem recurred... because the car found a way around your changes to accommodate a parameter left unchanged in the complete tune (i.e. that was not changed with the "global" changes you made). 

Ultimately, it appears to me that those kind of changes are designed to let you try something out... and then have your professional tuner make the changes so they "stick".

[FoMoCoSHO]

As tempting as it is, messing with the global modifiers just seemed like a bad idea, LOL....

Torrie needs an e-tip jar.

Seriously, the level of service he provides just make me want to give him money.

[SHOdded]

No e-tips, just fiery drinks

[donky4444]

How much is the stock pressure?  Don, did LME set your 1-2 shift pressure to the stock setting or something higher?

I didn't ask what the pressure was at, just that the shudder goes away and they got it. It's better than stock for sure though. I got my smile back after 3 days of driving around stock.

[AJP turbo]

How much is the stock pressure?  Don, did LME set your 1-2 shift pressure to the stock setting or something higher?

I didn't ask what the pressure was at, just that the shudder goes away and they got it. It's better than stock for sure though. I got my smile back after 3 days of driving around stock.

They may not tell you even if u ask...proprietary lol....kinda like they did in the other thread when someone asked what their fan temp was and lms replied with "pretty close to that" or something along the lines of vague lol.....or they may just tell you just to spite me lol

[wasinger3000]

Yeah pretty sure it's psi...I'll look at the units when I get home....wasinger I hate the global modifiers that u can do on the device..I'm not really sure how they are applied to the tune..personally I prefer to change the values in the actual tables but u would need the software and the tune in mtf format which most tuners won't give u anyway..so in ur case ur doing what u can...it's really not cost effective to have the software and pay a tuner for the mtf,assuming he will even give it to u, unless u enjoy tinkering and learning to tune...much cheaper to just buy a tune from lms or torrie

Hopefully Torrie can get mine to stick then. I just did what I could to save Torrie from the extra work.

Since the first few shifts after the reflash are perfect it's just a matter of finding out what that sweet spot is.

[wasinger3000]

How much is the stock pressure?  Don, did LME set your 1-2 shift pressure to the stock setting or something higher?

Stock is about 150-175 I'll look when I get home I can't remember exactly...it doesn't take  a lot to make a noticeable difference...the pressure smoothly increases with the amount of torque commanded and with rpm...so at wot and at 6500 rpm in the table is where the values are highest.

And all the tables for each gear is different...the 2-3 part throttle pressures are way higher than the other gears at part throttle..not sure why ford did that so I lowered mine to what the other gears are and it shifts smoothly after a reflash so the adaptive doesn't have much to learn...also it seems that the higher gears can tolerate more pressure at wot than the 1-2 shift...don't ask me why

I wish I know what it was at now and what the number actually represents. Is it 200 psi? Or just some kind of reresentarive number... I used my x4 to lower it by 25% of what I don't know... it's better still but for some reason after 4 or 5 wot runs the car goes back to the shudder shift. Like it enjoys being stupid...

I asked Torrie to change the shift pressure last night at 2am and I woke up to a new tune haha. Love that service!

So I'll see how it does now.

Hope this tune works to stop your problem...
The problem ajp points out is also complicated by the learning nature of the ECU and other modules... likely why your stutter got better and then the  problem recurred... because the car found a way around your changes to accommodate a parameter left unchanged in the complete tune (i.e. that was not changed with the "global" changes you made). 

Ultimately, it appears to me that those kind of changes are designed to let you try something out... and then have your professional tuner make the changes so they "stick".

It feels just like that. The car finds a way to revert back to the way it wants to operate. Which is great for somethings... just not this.

As tempting as it is, messing with the global modifiers just seemed like a bad idea, LOL....

Torrie needs an e-tip jar.

Seriously, the level of service he provides just make me want to give him money.

Hah. I've offered to pay him more money for all the work but he won't accept it.  :/

[Brucelinc]

This shudder anomaly seems sporadic and inconsistent.   When I first got LME's 4X tune last year, the 1-2 shift was pretty gnarly but after some miles and the adaptive learning process, it smoothed out.  Recently, it reared it's ugly head again - but not all the time.   I am not sure what causes the inconsistency - unless it is related to long periods of gentle driving (as we might have in winter weather) followed by some very aggressive WOT runs when the weather clears. 

In any case, I had LME adjust the pressure down and it is now very smooth.  I will have to see how it does over a longer period of time. 

[StealBlueSho]

This shudder anomaly seems sporadic and inconsistent.   When I first got LME's 4X tune last year, the 1-2 shift was pretty gnarly but after some miles and the adaptive learning process, it smoothed out.  Recently, it reared it's ugly head again - but not all the time.   I am not sure what causes the inconsistency - unless it is related to long periods of gentle driving (as we might have in winter weather) followed by some very aggressive WOT runs when the weather clears. 

In any case, I had LME adjust the pressure down and it is now very smooth.  I will have to see how it does over a longer period of time.

Did this resolve your issue? I have the EXACT same problem with the 4X tune... no other tune does this.. I have also received a bit of push back from LMS stating that there are 100's of cars running the 4+x without an issue. I emailed LMS again, asking them to dial back the shift pressure as it seems to have resolved this problem for other users. Still waiting on a response...

I have a hard time with it being sporadic... you sit in the pit waiting awhile for your run, just for this little hiccup to hit while going down the track...