I own a 1991 Jeep Cherokee and when I goto engage my 4 wheel drive in any position it wont engage. My rear tires still spin but not the front. Can anyone give me any ideas?

Thanks

Try this...
http://www.automotiveforums.com/vbulletin/showthread.php?t=739949

Someone else had this problem with their 91.

Thank you, you have been a great deal of help....I will give these things a try and see where it takes me.