Toyota Repair: 99 4Runner Limited AT transmission slip, cold mornings, toyota dealer

Question
99 4Runner 132,000 miles.  I bought it at 32,000 miles.  Transmission flushed(Jiffy Lube)about 2500 miles ago. On cold mornings when 4Runner is parked outside when put in drive trans will slip.  It will stop slipping very soon and everything is OK.  When it starts to slip, I can pull it back in low and it is OK.  When shift into low, you can feel it shift into gear and no slipping.  It's done this on 3 occasions.  It has always taken a long time to shift the first time since I've owned it.  The colder the morning, the longer it takes to shift.  After that one shift everything is OK. Does it sound like the wrong trans fluid may have been put in?  Thanks for any help you can give.

Answer
This transmission requires toyota type T-IV (type 4) fluid available at the toyota dealer, while some other fluids may be compatible I would not recommend using them, I would recommend removing all of the fluid with a flush machine and then putting the type 4 fluid in, this will probably solve the problem.