Hey guys I’ve been look all over the forums looking for an anwser, I suspect the 3-4 clutches went out on my 98 k1500 with the 4l60e, fluid is red an looks to be about 2 quarts higher than it should be, it shifts from first to second no problem but when going into third it shifts down to first, it’s not like neutral I can still get power but revs like in first gear, when I unplugged the harness from the trans I’m in default 1st and not 3rd. Anyone have any ideas?