your readings on the torque converter pressures are within specs for a torque converter pressure range.
What i would be checking is the inching adjustments and making sure it is releasing completely, if inching circuit is not fully releasing it can cause a hesitation in the clutches engaging.
Other things to check would be the inching spool/linkage/cable for binding.
Otherwise there may be some issues with the flex rings or something else in the clutch packs. (this would be worse case scenario)
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