97 Jeep Grand Cherokee Laredo

This is a stock 2wd automatic with 167K. Started having issues with it not wanting to shift into upper gears ( would rev high rpm ), sometimes letting off the gas would help. I dropped the pan, replaced filter and fluild and adjusted the rear band while I was in there and it did fine for a while ( didn't adjust the forward band as I couldn't get to it without dropping the transmission).

Ran fine for a while, but having the same shift issues again. At first it would come and go, again improved if you would let off the gas and let the rmp drop it would shift up. Now, it dosent get past second... any thoughts on what to do from here? And does anyone know of an online place I could get a shop manual on the transmission?

This is my first attempt to post here, so if I've left something out, please be kind and let me know & will post additional information. Thanks! EMan