What could be the problem with my truck no front gear only goes in reverse

Sounds like something broke internally in the transmission. I would recommend taking it to a reputable shop to verify the problem. We would be more than happy to get you in and check it out for you. We provide a complimentary inspection that is no cost to you. We can also set up a tow if needed too. Feel free to give us a call if you would like our help, 262-728-2944. Advanced Auto Clinic in Delavan.