The reason why I love this place is because of guys like Jason. I asked him about fast learn and how do it and he sent me this. I also asked him if there was a different memory between TH 4wd low and TH 2wd? Thanks Jason.
You're not a pain - Don't worry about it!! We've ALL been here; seriously!
Ok, fast learn is done using the flashscan plugged into the laptop and the truck with the truck running.
Start the efilive scan tool program. Start logging as normal with (the controller doesn't yet matter - even though you're doing a tranny thing you can have selected the LMM controller; that way you don't have to change or mess with PIDs everytime you do the fast learn!).
Now when you start 'logging' ( you can even use the yellow button instead of the red so it doesn't 'save' anything).
Now while you're logging choose the DVT tab...
Select LBZ/LMM Allison TCM
Press Activate
The first set of tabs on that page you will see is the 'adapts' tab.
What I have been taught to do is select the top three on the left....
1. Clear All Adapts To Fast (Instant)
2. Clear All Adapts To Fast + Base (Instant)
3. Clear All Garage Shift Adapts to Fast + Base
Check all of those three.
Then press the "Clear" button on all three checked values.
It's kind of weird but, you have to check the box, and THEN press clear to make it happen, there was times I didn't do both and wound up changing nothing.
That's it... Your tranny is in fast learn mode!
The first thing I do is put it in reverse, and then immediately into drive... it's GOING to feel weird and sometimes clunk, but definitely lurch.
What I do is when I change tunes I do a fast learn.
Then i do 3 1/3 throttle runs between all gears, and then 3 2/3 throttle runs between all gears, and then full out 3 runs in all gears (if you're running a big tune and stock trans, careful with this, I let off on the 4-5 shift) - Then put it in tow haul mode and do the exact same thing (they base themselves off of 2 different shift programs and both have to learn the new power).
I only do that fast learn if I've added alot of power or changed something pretty drastically in the tune. If I've only added a little fuel and I'm on the same base tune as I was running before I won't bother.
If I add quite a bit, or change something pretty drastically (or someone sends me a tune to try and I don't know how the truck will react) I fast learn.
As for the different memory maps, that's a great question!! I wish I knew, but, I BELIEVE the only separate memory I've seen is between the modes rather than between the 2 or 4 wheel drives... I know the shift points are different through the TCM map but I've never heard of different adaptive cells between different wheel drives.
Looking at my trans tune adaptive presets (tap presets) it shows regular mode and tow haul mode having separate presets but that being the only 2 adaptive cells used.
Sorry so long winded, if you need anything else let me know!
You're not a pain - Don't worry about it!! We've ALL been here; seriously!
Ok, fast learn is done using the flashscan plugged into the laptop and the truck with the truck running.
Start the efilive scan tool program. Start logging as normal with (the controller doesn't yet matter - even though you're doing a tranny thing you can have selected the LMM controller; that way you don't have to change or mess with PIDs everytime you do the fast learn!).
Now when you start 'logging' ( you can even use the yellow button instead of the red so it doesn't 'save' anything).
Now while you're logging choose the DVT tab...
Select LBZ/LMM Allison TCM
Press Activate
The first set of tabs on that page you will see is the 'adapts' tab.
What I have been taught to do is select the top three on the left....
1. Clear All Adapts To Fast (Instant)
2. Clear All Adapts To Fast + Base (Instant)
3. Clear All Garage Shift Adapts to Fast + Base
Check all of those three.
Then press the "Clear" button on all three checked values.
It's kind of weird but, you have to check the box, and THEN press clear to make it happen, there was times I didn't do both and wound up changing nothing.
That's it... Your tranny is in fast learn mode!
The first thing I do is put it in reverse, and then immediately into drive... it's GOING to feel weird and sometimes clunk, but definitely lurch.
What I do is when I change tunes I do a fast learn.
Then i do 3 1/3 throttle runs between all gears, and then 3 2/3 throttle runs between all gears, and then full out 3 runs in all gears (if you're running a big tune and stock trans, careful with this, I let off on the 4-5 shift) - Then put it in tow haul mode and do the exact same thing (they base themselves off of 2 different shift programs and both have to learn the new power).
I only do that fast learn if I've added alot of power or changed something pretty drastically in the tune. If I've only added a little fuel and I'm on the same base tune as I was running before I won't bother.
If I add quite a bit, or change something pretty drastically (or someone sends me a tune to try and I don't know how the truck will react) I fast learn.
As for the different memory maps, that's a great question!! I wish I knew, but, I BELIEVE the only separate memory I've seen is between the modes rather than between the 2 or 4 wheel drives... I know the shift points are different through the TCM map but I've never heard of different adaptive cells between different wheel drives.
Looking at my trans tune adaptive presets (tap presets) it shows regular mode and tow haul mode having separate presets but that being the only 2 adaptive cells used.
Sorry so long winded, if you need anything else let me know!
