[lindstromjd]

It's all in how you load the trailer (where you put the weight of the 'burb being towed) and in how well you can stop. I would almost say load the 'burb backwards, so the engine and most of the weight of it is on the trailer's axles, but it all depends on what size trailer you have. If you can load it normal and keep the weight off the hitch, then go for it. The trailer's job is to hold the weight, so let it do that. Don't overload your hitch.

Give yourself more than ample space to stop. Your 1/2 ton brakes won't be happy about it, so be careful of "glazing" them by riding on them too much. Be sure you're able to slow your rig down in spurts, alternating hitting the brakes and letting it coast a little so the rotors can cool down.

Towing in 4th gear isn't necessarily bad, as long as you can keep the transmission as cool as possible. It's the heat that will kill your clutches. You don't want to get anywhere above 220 degrees inside the case. 200 is even a little too hot; the temp inside should never really get above 180 for very long. The safe way to avoid that is to tow in 3rd gear with the torque converter locked in. If it's unlocked, it will slip and create a lot of excess heat, so make sure it does lock in. The last thing to look out for is make sure your transmission doesn't "search" for gears, i.e. if you're at a certain speed and the transmission can't decide if it want's 3rd or 4th and keeps jumping between the two, just put it in 3rd and let it stay there.