727 Trans shift help ASAP

Somethings still not quite right here.

Firstly guys, I'm 100% sure that the Transgo TF2 was put in correctly as the shifts are crisp under light load or part throttle. I also ensured my bands were adjusted correctly.
Due to the 3:91 under light throttle (cruising) she will shift into 2nd about 2200 RPM, drop to about 1700 then shift into 3rd about 2700 RPM.


THE PROBLEM....Took it out a a few harder runs.... and found from part throttle when putting the hammer down she drops into low gear and the car flys but won't up-shift until I back off on the gas???

I tried this in manual as well from a stand still...In first, hard on the hammer-RPMs @ 5500...shift to 2nd and she won't up-shift.

This trans worked well in my son's duster and I thought perhaps it was my kickdown, however I'm sure it's correct as well.

PLEASE CONFIRM for me!
This is how I set it up!

"At the trans", I ensured the kickdown lever itself had full movement, then made sure it was held fully foreward for my upper adjustments! Next, at the carb I adjusted the rod at rest so the rear of the opening sleeve was up against the throttle lever. Once this was completed I push the throttle to the rear WOT and tweaked a tad to ensure "at" WOT the kickdown lever was fully to the rear.:book:

I figured my adjustments were done correctly as I have done it a few times...My thoughts now are perhaps with the new TF2 line pressure, just maybe my kickdown comes on too soon??? or when held at WOT the kickdown fully to the rear won't let it up-shift???

ANYONE!!! :notworth: