Mitsubishi Repair: trany prob.94 3000gt automatic, change good luck, cold car

Question
When car is cold,car runs great for about 5 or 10 blocks,then begins to slip badly.when car returns to being cold,it will run good, then the same slipping problems happen when it is hot.

Answer
Larry,
You may have a low fluid level or particularly dirty fluid.  There may even be a clog in the transmission cooler and the fluid is overheating.  Have your mechanic inspect the fluid and get a flush and fill of transmission fluid; which should include a transmission filter change.
Good luck!