Did this 3rd gear issue get sorted? Coz I think I'm in the same boat. I'm going to lift the truck off the ground and try to feel the changes but I'm pretty sure the only shift I can hear is 1/2, it absolutely boots it off the line and will shift into second after about 10m at full throttle but then no shift to 3, tried leaning out - got more speed and rpm but no shift, I have only tried to adjust the 2/3 shift point a few times and will keep trying for now, I don't really want to tear it all down if its not going to fix it - nor do I want to drill the clutch to add weights as the stock setup works for most people.