I guess you have an auto. If so you need to loosen the bolt on the shifter shaft coming off the steering column. It is under the hood. Follow it do wn to the bottom and lossen the bolt. Then re-adjust your shifter, may take 2 people. Then re-tighten the bolt. Mine did the same thing.
1987 Jeep Laredo, 4.2L engine, Holley 350cfm carb, TF999 trans, np207 transfer case, Rough Country 4" lift, Mickey Thompson wheels, BFG 33/12.50/15 tires, Ongoing Father and son project.....