After doing much looking research, etc when I was thinking about a Weight Distribution Hitch I discovered something scary. The Hitch that came on my Ford F150 has 2 ratings. One without a WDH (500 lbs) and one with a WDH (a lot more). The tongue on my 3023 was 750 pounds! I needed the WDH for this reason alone. Forget all the weights on axles, measuring how high your front goes up, or the rear down. If your TM tongue weighs more than your hitch is rated, you need a WDH.
Just lay on your back and look up under the rear of the TV. There should be a label with all the ratings on the hitch. Here is a way to measure your tongue weight:
http://www.ehow.com/how_6293460_meas...ue-weight.html
There are other ways that may be a wee bit more accurate but this works and it is with materials we all can get our hands on.
Dave