How to Drive in the Mud
First rule is to know your trucks capabilities, the last thing you want to do is to drive your truck into hole that ends up ruining your truck. Which brings me to my second point, check out your trail and any mud hole you are about to dive into . . . even if you were in it last week or even yesterday, you never know when or where a truck twice your size has buried itself!
All Terrain tires are good but Mud tires are better. More importantly have recovery gear, and another truck who can pull you out with you. Even the most capable trucks get stuck, the only difference is they are farther in and much deeper . . . btw w/ that said make sure your buddy can pull you out!
When driving through mud you want to have a little speed, however you never know what all is in the mud hole. The last thing you want to do is hit a mudhole going 30 and halfway in find out there is a log in the middle by hitting it and damaging your truck. Therefore find the lowest speed that will allow you to make it.
Another concern when neqotiating mud is the clogging of the radiator. When mud prevents air from flowing through the radiator you will overheat the engine. That is another reason to go as slow as you can afford to and still make it. If you know the radiator's air flow is blocked with mud, attempt to rinse it out with water before the engine overheats.
Mud-bogging has become a popular part of offroading. So much so that mud-bogging competitions are held that are brokeen down in classes from stock up to nitrous oxide enhanced engines turning paddle equipped tires. More about these mud events can be found at: