The linkage was loose so i put bolts right where the shifter enters the truck. now under that there are two rods. Just one is moving and the other one is not. It looks like there is a small hole to put a pin in there so when you shift it, both of them move. Now the hubs on the front wheels say free lock. it stays in 2wd, cause i tokk it throught a small mud hole. And i kept on shifting it back and forth. and one time it would not shift in drive and when i put it in park it made a grinding noise. I need help please