Refresh my memory. Are you running with a chip? You do have a 95?
I used to lock up my TQ but gave up after noticing how much stress it put on my car on a Dyno. Here is the procedure how to do it with a tuner:
Set the 1-2 shift to 5MPH across the board
Set the 2-3 to 10MPH straight across again
Set the converter lockup in 3rd to like 22 MPH straight across
Set the 3-2 and 2-1 downshifts to speeds lower than the upshifts so it won't kick down.
With that note... The question is when does it lock up? How about some more details?