You're welcome.
I'm at a true loss with trannies, man. I think of them as a black magic that only necromancers can comprehend...or something like that. Since you're not getting a kick-down gear, perhaps the valvebody or solenoids aren't kicking in just right? Could be the PCM or BCM is having a bit of a seizure. I'm truly grasping straws right now. My 210k 00 GT has never had a tranny problem that I know of, and it sounds like I'm much harsher on mine than you are on yours.
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WizAire CAI w/9" K&N & HV3, 2.5" d/p w/h/f cat, Cobra CB, PowerSlot slots w/Hawk HPS, GR-2s, GMPP handling kit, NextLevel STBs, Pilot Sport A/S Plus tires.
98 L36/MM5
RaC