Chuck,
What you might need to do is adjust the shifter. Except for access, there's not much too it. You'll have to do this from below or remove the tunnel.
To see if adjusting is what's needed, place the shifter/trans in neutral and try sliding a dowel/drill (should be about 3/16") through the shifter body and all levers. You should see a notch at the bottom of the shifter body. If it slides in easily, the shifter is adjust correctly. If it doesn't you need to adjust it.
To make the adjustment, disconnect the levers at the threaded ends (don't lose those unobtainium clips). Slide the dowel/drill in place, then rotate each end (trunnion) until it lines up with and slides into the shift lever with bushing in place. Replace the retaining spring clip. Oh, make sure the bushing is in good shape while you're at it. Replace it if it's not.
Do this with each lever and you'll be pleasantly surprised at how much better your shifter works.
Good luck.
