First of all I have a 95 4runner. stock. ths happened to me today and once before but i would be cruisin down the road (light foot) 45-50mph 2100rpm and it would down shift at random. I dont put my foot down or anything. then it would upshift and it wouldnt let me go anywhere. Its only happened twice in the last 5 months so i didnt check it out. Is this normal??? should i get it checked out???