Wilber15

I just bought a 2005 F350 Diesel, crew cab. This is my first Ford truck. When I test drove it I tried shifting into 4x4. and the light turned on just fine for both the high and the low. So I thought everything was good. Just today, I got stuck on some grass pulling my trailer (it had just rained). I tried popping into 4x4 and the light turned on, however, only the back wheels were spinning. The 4x4 was not engaging, but the light on the dash was on. Any ideas on what it could be?

Please contact me at my email address : costiucs@hotmail.com
that would be the best way to get in touch with me.

any help or thoughts you could have would be greatly appreciated.

thanks

Sam