I have a 77 k10 that has a turbo350 with a np203 that i think has been converted sence it has manual locking hubs in the front. The problem is, is when i try to shift the trans case it is hard to move but when i shift it you cant really tell which one it is in as if it is kinda loose and can easily slide in another gear , should it do that or should it be firm in gear like an auto transmissions gears are?When its in 2hi i can gigglee it forward and backwards. Should it do that or should it be tight? Some times when i start my truck and put it in gear(any gear) it is like its in neutral and wont move and i can hear what sounds kinda like a chain "grinding" thats not every loud could that be the shifter in the np203? Any help is appreciated.