Originally Posted by Darrin
It's not that a half ton can't pull a trailer that size, it's that it wasn't designed to do it. The most immediate thing you'll notice is you wont have the stopping power as a heavier rig. Second, you'll burn up your transmission if it didn't come with a tranny cooler on it, if it does have a cooler you can still burn up your transmission. Third thing you'll have is general breakdown issues which can often leave you stranded with a hole in your pocket.
Yes, pulling it isn't the problem. Stopping it might be.
Here's the real issue as I see it.
If you exceed the ratings of your truck, and choose to pull more than the truck is rated for by the manufacturer you could have serious liability issues should you become involved in an accident.
Adding heavy duty springs, shocks, etc does not change the manufacturers rating.
I'd check with your insurance company and make sure you're covered while pulling it.