I have a modified '87 GN (which is for sale). Just got the trans rebuilt with all the Art Carr goodies and a 10" 3000 stall. When I first got it back, my TCC solenoid starting sticking, so, I took it back, the guy at the trans shop replaced it. It worked 2 times on the way home, then it stopped working....but not completely. You can feel the TCC engage then disengage very quickly. It only does it 1 time when above 50MPH and it just stays disengaged. It can't be a switch or else it wouldn't be working at all. Anyone ever seen this??