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Trans hits 4th hard with light/no throttle, fine with moderate throttle
I believe this is a tuning issue, ever since I raised the speed at which the trans engages OD it's been like this. It's much worse now with the shift kit, but it's the only time the trans is harsh, so I really don't think the shift kit is to blame. If I'm coasting down a hill and the truck hits its shift speed, it drops it way hard. Same as if I'm loafing along just enough to get it up to the minimum OD upshift speed. I believe I'm to blame here, but don't know how to smooth it back out. Anyone?
Trans hits 4th hard with light/no throttle, fine with moderate throttle
I'm on my phone so I can't see your tune but it sounds like the shift kit has quickened the shifts do less psi is needed for the same shift time. With the commanded shift time set to 0, the tranny isn't trying to modify pressures to hit the shift time. It's only shifting on pressure only. I can't remember the table number but there is one that defines the 3-4 shift psi vs engine output torque. You should log it and see exactly at what output torque it's happening below and lower your shift pressure in there
But I think your seeing it with the higher shift speed because it takes more throttle and there is more rpm drop at that shift point now
I apologize if I'm in left field, that's just what it sounded like reading it and like I said, I can't see the tune right now