So I'm still learning alot, bear with me please. I have a 1994 ZJ with the 5.2L. What would be the first couple things I check if my front axle won't lock in? It's supposed to be 4x4 all the time, but all i get is power to the rear wheels, even in 4Low.
Is the front propeller shaft in place? Many times its removed due to some failure.
If its in place, then my first thoughts go to the T-case. Not sure which T-case is in your jeep, but it probably has a chain drive in it. The chain can stretch too much and skip the teeth.
JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.