I know this issue has probably been beat to death on the forum but I’m trying to figure out what I need to do to get my transmission shifting right. I’ve got full deletes with the RaceME ultra programmer and the 3-4 and 4-5 shift almost seem like it’s slipping. It probably isn’t since it never has went into a limp mode. I’ve got the new Aisin in my ‘18 4500 and it shifts the way a truck should. I’ve wondered about just converting the 2500 to a Aisin. I run the 60hp tune most of the time and the 120hp on occasion. Trying not to have to replace the transmission. Although a Suncoast or a RevMax would suit me fine if y’all have one layin’ around collecting dust.


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