Gear indicator off?

03 v6 4x4 auto Tacoma. I recently got my frame done and now my gear indicator is off. When I shift to drive it goes in between neutral and drive. I can push it all the way down and get it to sit in drive but if I hit a bump it will go back in between drive and neutral. Runs and drives fine and all other gear seem to line up however when I put it in park I've noticed it's almost like it's not in all the way sometimes. Anyone have any incite?

 

The shifter cable most likely just needs adjusted. I'm not sure if it's at the shifter end, the tranny end, or both on our trucks. Only adjusted one on a jeep before!

Edit:http://www.customtacos.com/tech.old.../06toyrm/06toypdf/06rmsrc/rm2006ta/026010.pdf

 

Did you do the frame your self? If not I'd take it back to who ever did. No reason why they wouldn't/shouldn't fix it.