SCarman

ive looked through SEARCHES and have not found anything of valuable info so here goes..when i drove my wifes car last night on the highway 65-70 i noticed right away that it was not going into overdrive,,rpms a lot higher than my sc300,for same speed.Also she has mentioned seeing od -off light flashing numerous times.Also i noticed it seems like it is shifting to third,missing 2nd completly.i saw some of these problems in forum searchs but no solutions,pleeeeease help.......one more thing,her speedo works when it feels like it...so i replaced the vssand that didnt help or change a thing.