10R80 Downshift Response Improvement

[ZXMustang]

This is the table in HPT that Mike's referring to. Shift character table. There is 0, 1 and 2 for the gen3. They corespond to base, ALT1 and ALT2 shift scenarios. I say scenarios because those three are referenced in many parts of the trans shift configuration. Simply change the shift characters for the different modes does help, but you need to carry all the shift schedules with it include all the tq converter tables for lock, unlock and slip. Plus all the clutch inertial and incoming and offgoing tq values. Everything is tied togther. Its easier said than done and remember we are tip of the ice burg here with what we can actually change. There are 10x as many parameters that arent defined and we wont be able to see or change. This is territory that most tuners stay away from since it can open a sink hole to god knows what. This is from an OEM cal from a 22GT 10R80. OFF is like any other scenario other than SST (select shift manual mode) and LID (leave in drive mode). Mud is track mode and sand is drag. Sport/track is actually just sport/sportS.

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[ZXMustang]

To add more to this, there are other ways to make it shift smooth as butter and help it down shift faster that are far simpler than trying to reinvent the wheel with trans tuning. Believe it or not Ford has most of this right, but it needs to be "sharpened" to work the way you would feel it should.

I have a few tricks that took a good year of R&D to test and roll out, but since then I have been able to make many a happy tuning customer with these changes that gives them what feels like a whole new car. On top of being noticeably faster. One thing I've learned in the years and hundreds and hundreds of these I've tuned is that less is more and thats even more crucial when tuning for boost. Remember "LESS IS MORE". Thats all Im sayin.

 

[engineermike]

@ZXMustang to be clear, the table auF66752 that the thread is about isn't defined in hptuners. It assigns the shift schedules to the drive modes. It does not assign shift characters to drive modes.

...all the shift schedules with it include all the tq converter tables for lock, unlock and slip. Plus all the clutch inertial and incoming and offgoing tq values. Everything is tied togther. Its easier said than done and remember we are tip of the ice burg here with what we can actually change.

I actually spent weeks working on a single shift and experimenting using focused, high speed data logging and I figured out what all of those transmission parameters actually do. It's very interesting once you figure it all out, how many phases each shift has, what each phase does, and what each sub-phase does.

There are 10x as many parameters that arent defined and we wont be able to see or change.

You must be talking about HPTuners, specifically.

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