How to I put a truck into 4WD?

I've been looking a purchasing a 2000 Ford F350, so far I've everything seems okay on the truck. I don't know how to switch the truck into 4WD so I can test that out, it has a switch on the hub caps that say "lock" and "free" and also a lever beside the gas pedal with indications on which setting is 4WD high and which is low range.

Put the lever in 4 high (or low) and then switch the hubs from free to lock. Reverse the procedure to go back to 2WD. If you are still in mucky ground when you want to switch back to 2WD it is okay to let the hubs o until you are ready to get out and switch them but I don't recommend any freeway driving like that.

Sometimes you will have to rock or roll the truck a bit to get the lever to switch out of 4WD if the hubs are still locked.

HI GEEEZEE ask the owner… Seller.

Google hand book Ford F350 2000 as different cars use different methods
Some you have to physically select on the Hub then inside you select High/Low Ratio. Others you can do so manually, The old Land Rover had 2 levers, 1 selected 4WD which you had to select before you could select or Ratio

Andy C