transmission will not go into overdrive

[max]

My transmission will not go into overdrive when I am on the highway it seems as thought it is in 4th gear When I get on it it seems as thought it will not kick down an pick up speed. Any ideas or suggestions?

 

[max]

Taking it to the shop as there is no ideas here.

 

[Explorin94]

Well lets see here......manual or automatic? We can't read your mind just what you type in your posts!

 

[alwaysFlOoReD]

I'm on mobile and can't see if you have truck info under your name. It does make a difference what year and trans.

 

[drsvox]

he's running a 99 xlt...no trans info.