Might finally be time to worry about the transmission

[John Miller]

AJP, when I first got a Torrie tune, the 1-2 shudder was VIOLENT.  He put it down to what he called "stock," but that didn't help much.  He then made one other change and it was magically fixed.  He wouldn't tell me what he did, though.  I asked again today, but got crickets.

Right now, the V10 Livernois I reloaded today is close to stock on the 1-2.  Anthony says the calibrator was reluctant to go completely to stock, though I didn't understand the explanation why.  Allegedly, it is within 1-2% of stock levels on the 1-2 shift. 

Based on some of your former posts about part throttle 2-3 shifts being high pressure, and based on what I felt, I also had them dial that down a bit

[rowland2004]

AJP, when I first got a Torrie tune, the 1-2 shudder was VIOLENT.  He put it down to what he called "stock," but that didn't help much.  He then made one other change and it was magically fixed.  He wouldn't tell me what he did, though.  I asked again today, but got crickets.

Right now, the V10 Livernois I reloaded today is close to stock on the 1-2.  Anthony says the calibrator was reluctant to go completely to stock, though I didn't understand the explanation why.  Allegedly, it is within 1-2% of stock levels on the 1-2 shift. 

Based on some of your former posts about part throttle 2-3 shifts being high pressure, and based on what I felt, I also had them dial that down a bit

John do you have a 2015 as well?


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[John Miller]

Yep, 2015, non-PP. 

[SHOdded]

.LMS no idea as i havent seen a log while logging torque source

Maybe we can have John log with his X4

[AJP turbo]

.LMS no idea as i havent seen a log while logging torque source

Maybe we can have John log with his X4

That would be a dream come true. If john sends me his email I'll send him a config file to log with! He should do a 0-whatever mph through the gears and a single gear pull in 3rd or 4th from 2k to redline.

[AJP turbo]

I have had some changes and I now run 250 psi for the 1-2 shift. It's not a simple matter of changing pressures there is more involved....You can believe what you want or interpret something how you want but I don't really understand someone saying they changed things to "1-2%" of "stock".

I never get a shudder or wheel hop type issue and I'm running 250psi for 1-2 and 2-3 now. The shifts are amazingly fast at WOT and butter smooth at part throttle

As far as the adaptives in the trans. If you don't change other things the pressures you change won't matter as it will just revert back to stock and unlearn the changes to pressure that were made, unless you cap the amount of learning allowed which is being done either intentionally or not.

[John Miller]

I'm no longer convinced this sensation is "transmission bind."  I'm wondering if it is the traction control studdering as the car bangs into 2nd.

Reason being, on dry pavement, this only happens on 1-2 shifts at WOT. But, in the rain or when traction is otherwise compromised, it will happen at less than WOT, eg 3/4 throttle.  Logically, that would mean that wheel slippage is playing a part.

Just another of my theories that I won't claim is correct. . No doubt dialing in the trans pressure just right would help the matter though, so that much I'm positive about.


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[AJP turbo]

No wheel hop here at 17-18 psi....need more trans tuning

[John Miller]

Yea, you said that


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[ZSHO]

I'm no longer convinced this sensation is "transmission bind."  I'm wondering if it is the traction control studdering as the car bangs into 2nd.

Reason being, on dry pavement, this only happens on 1-2 shifts at WOT. But, in the rain or when traction is otherwise compromised, it will happen at less than WOT, eg 3/4 throttle.  Logically, that would mean that wheel slippage is playing a part.

Just another of my theories that I won't claim is correct. . No doubt dialing in the trans pressure just right would help the matter though, so that much I'm positive about.


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I always try to stay on top of the newest TSB'S and Ford updates pertaining to my vehicle and hopefully there will be an update & fix on the topic, issue on hand.  Z

[rowland2004]

I'm going through the same issue and working with my tuner and it's getting close to no studder/wheel hop 1-2WOT on my 15 sho.


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[AJP turbo]

I'm no longer convinced this sensation is "transmission bind."  I'm wondering if it is the traction control studdering as the car bangs into 2nd.

Reason being, on dry pavement, this only happens on 1-2 shifts at WOT. But, in the rain or when traction is otherwise compromised, it will happen at less than WOT, eg 3/4 throttle.  Logically, that would mean that wheel slippage is playing a part.

Just another of my theories that I won't claim is correct. . No doubt dialing in the trans pressure just right would help the matter though, so that much I'm positive about.


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I always try to stay on top of the newest TSB'S and Ford updates pertaining to my vehicle and hopefully there will be an update & fix on the topic, issue on hand.  Z

What do TSB's have to do with shift stuttering on tuned SHO'S? I didn't think people were having problems with stock tunes

Changing pressure is basically useless unless you change other things....The pressure that you set in the tune will get learned completely back out unless you make the other changes.

This is starting to fall on def ears anyway....Actually you don't even need to tune any of the shift pressure tables as long as you change other things....The pressure will get to where it needs to be regardless of what you set in the pressure tables....The pressures that you put in the tables are just a starting point until the learning happens.

[John Miller]

AJ, it is falling on deaf ears cause you keep talking about this magic cure, but give no details on what tuners should be doing or looking for.  You very well might have discovered something, so what is it?  Cause, I can tell you this, Livernois doesn't know it, and I do have faith they are the best around on the EBs.

Frankly, whether the sensation is transmission bind, traction control, or wheel hop, I think we all must acknowledge that different cars will react differently --- particularly when you start pushing power limits like we are.  It's one of many reasons the manufacturer didn't sell them tuned for this much HP; they had to ensure every one reacted the same way.

So, I'm sure yours is great.  Mine does it for only a split second on WOT, which is an improvement thanks to running STOCK pressure parameters.  Someone else might have a one or two second VIOLENT shudder with the same tune like I did with the original tunes. 

[SHOdded]

True, it would be helpful to know what exactly DOES need to be changed to eliminate this irritating behavior of the transmission.  If it is a "logical" i.e. software fix, that would be perfect.  Much easier than trying to find a mechanical fix or upgraded hardware!

[AJP turbo]

Yea i know its rather ambiguous of me but perhaps in the near future i can be more helpful...my apologies