Shifter isolator for an XJ / YJ. Really anything with the NP231 shifter with the removable shifter handle.

I printed this in PETG because I only have an Ender, but would probably be best in TPU or ABS. Regardless, it's better than the shifter handle removing itself when you try and shift into 4WD. Print with whatever settings you like. I used a .6 tip and 2 walls at a layer height of .36.