Im working on a '90, 4wd, aw4, 4.o, np231. I took out a perfectly shifting tranny to replace a leaking soft plug on rear of block. I get it bolted up and fluids topped off, now it shifts hard into 3rd. All other shifting seems to be the same as before. Re-adjusted kickdown cable, I didnt unhook any adjustments on linkage, tranny and t-case came down in one piece. I am missing something, Just cant think of anything else to try. Help me out here guys, sucks when something worked fine before I touched it.