2000 toyota tacoma 4x4

Whenever I try to drive my tacoma after it’s been sitting for a few hours, the front wheels lock up and I have to push on the gas until it finally pops and starts going. Everytime I stop after that for about the first 3 minutes of driving, it will lock up again and then after that 3 minutes, it seems to be fine. What’s going on? I’ve had the brakes checked several time and it wasn’t that. I had the transmission and transfer case checked and it wasn’t that. I love my Truck, but this is driving me crazy! Any ideas? Is it the differential maybe?

Sounds like a blocked or plugged break line.