700r4/np208 question
 

Let me apologize in advance if this is in the wrong section New guy here, and I recently purchased an 86' K5 with a 350, 700r4/np208.. Problem is when I put it in gear, It wont move.. The selector cycles fine, but it wont go..Today I put it in neutral and engaged 4wd Hi, and was able to drive around in our pasture.. I am unsure of where to start troubleshooting.. Fluid and filter is good... Thanks in advance