Re: 4X4 control computer
The 4x4 system in the WJ's is all mechanical, no electronic parts. There is nothing you can change. Since you mention 2 wheel drive I am guessing you have selec-trac with the trac-lok rear axle, the locking axle should engage independent of your 2 or 4 wheel selection on the transfer case.
My Jeep: 2001 Grand Cherokee Limited, 245/65R17 Falken Rocky Mountain ATS, K&N drop in air filter, Bilstein HD's. De-badged, eagle-eye LED Tails & LED 3rd brake light, Addco front and rear sway bars, Superchips tuned & TM snip, interior 6k LED's, Gen3 ccfl projectors with Volt 6k HID lows, akebono brake upgrade with R1 Concepts premium rotors.