Now it's hard to put into Dr eventually it goes but I'm jerking it playing with

i turn my truck on ready to put it in drive to leave I can't it won't go into drive I have to jerk it and play around with it and finally Goes to Drive I can drive now

Owner: It is very difficult to understand what issue you are having, possibly a gearshift interlock problem, maybe a faulty brake light switch ? ( which is involved in the interlock circuit )