Engaging 4L from a stop has always resulted in grinding for me. I always engage 4L by doing the following (assuming you're already in 4-Hi
- Get your Jeep rolling 2-3 mph
- Slip your transmission in Neutral
- With your Jeep still slightly rolling, quickly move the transfercase lever through neutral to 4L
- Slip your transmission into gear
The above has always worked for me, and I read somewhere that engaging with the vehicle slightly rolling always helps. No grinding.
2001 2.5L TJ, HPD30/D44 with dual OX and 4.88, full armor, X20-8 winch, 35" STTs on 15x8 black Cragar Soft 8s, 1" BL, 1" Brown Dog MM, 4.5" suspension w/ fully adjustable control arms and tie rod upgrade, OBA, Novak Shifter, PS hood louver