when changing the filter and fluid on my dad's D (now mine) I tightened a screw with a lock nut that i thought was for the band located toward the back passenger side. Now that i know that this tranny doesn't have bands, what did I tighten? it was pretty easy to reach with the pan off.

 

Welcome to DF
Do you have a 4.7L motor or the 5.9L? This will tell me what transmission you have.

 

sorry, 4.7 with 4spd auto

 

That screw you turned may have been the return bypass valve for the return filter.

 

any idea how it should be adjusted so i can undo what i did?

 

I found this info from a google search. I thought it might help others

http://www.hotrodlane.cc/New%20HEMI%...mi%20trans.pdf

 

Do you remember how many turns you made?

 

unfortunately, no. but on the pdf above it lists the torque to 40 inch pounds so I will return it to that torque and see how it does.