Jim you can try unhooking the kickdown lever for a try but it should shift since it shifts at low speeds. Your low speed shift rpm's are pretty high also. Usually under light throttle it'll shift by 1500. Do you remember doing the mod where you grind off a little of the throttle pressure rod to make it shorter? If so the only thing I can think of is since there was 2 different kits installed their is a mis-match of springs causing a problem. The 1-2 and 2-3 shift valve springs work in conjunction with the governor for the shift timing. Also the throttle pressure and line pressure all come into play. Kinda like programming a computer. Everything has to be so. At this point I'm not sure if just a governor weight/spring mod would lower the shift points or not. You may have to get a stock valve body and start from scratch. Sorry but that's my best guess.
