Dingo Warrior

Its a 2000 Forester. The transmission is exactly the same as the other one. Since both problems are only present when the car is cold and they also both go away when warm, I figured the same problem is causing both. Would "band adjustment" cause both problems?

I had a friend swap out a transmission for me when my other one had a bad differential. The used one he put in has a jolt from 1st into 2nd and then it slips from 2nd into 3rd but only when cold. After it warms up it functions normally. I have tried changing the fluid but it doesn't seem to help. What could else could it be? Torque converter? Valves? Solenoids?