I need to adjust my shifter linkage. While in "Drive", the tranny will act as if i'm bumping the selector into "neutral". This will stop if I keep pressure on the selector, pulling back toward "2". THat's why I think I need an adjustment. Is this something I can do or is it time for a trip to the dealer?

93 Ltd. 5.2, K&N FIPK, Edelbrock IAS Shocks, Mopar Performance ECU, 180K miles