Originally Posted by KILLER"B"
Your kick down lever spring may have fallen off. Allowing it to downshift some of the time. If you take off in manual low and upshift manually does it do it every time or still feels like it is slipping? You may have gotten lucky with the trans flushes, but I have only known 2 others to make it without having to be rebuilt. Those are pretty bad odds. If yours does survive, consider yourself lucky.
I got a full flush from a shop last nite and its been really great ever since....
<-- I hope!!