Loud pop then truck hardly moved

Was sitting at red light, light changed, I pushed gas and a loud pop came from under the truck. Truck wouldn't hardly budge. I had to reverse and max out rpm's to get vehicle to move backwards out of intersection. After getting clear of traffic I tried moving forward and had the same issue, I had to floor it to get it to move and it only got up to 15 maybe 20 mph. I limped it home full throttle almost.


My truck is a 1500 extended cab.