Need help bad! My transmission went out about a month ago. So I went to a local wrecking yard and purchased a trans. Installed it and OD light was flashing and trans would not shift into 3rd gear and rpm's would go up. Removed trans and took it back.....got another trans on Friday and installed today. Now this trans won't go into revetse,1st, or second gear. Am I doing anything wrong? Is there a special procedure when replacing it? It is 02 v8 4.6l.

 

If you went to a wrecking yard, it was there for a reason