1993 Ford Explorer slips in and out of 4wd

Hi:
Does it still have the oem auto locking hubs on the front? Is there a grinding when it happens in the front? Finally, have you ever checked the 4wd actuator on the transfer case?

Let me know.

Hey there thanks for responding!

-Yes it still has the hubs
-yes it grinds in front when it goes into 4wd
-and no I have not check the transfer case yet but I talked to my mechanic friend who has the same car after I made the post and he said that's where the problem could be

if you have any ideas or advice I'd love to hear thanks!

Hi:
If you hear the front hubs grinding, they need replaced. The auto hubs may be spent.

thanks for the help!