transmission wont shift to Over drive

[SSlevin]

After the dealer replaced the pinion seal and axel seal. I went to drive home no O. D. I took it back and they first said it needed a new transmission? The after putting it on the DBR it says throttle postion sensor.

I am sure it is something simple but the Deisel guy wont be back till monday.

Anybody got any ideas.

 

[SSlevin]

I expected a reply by now. Are yall slowing down?