Thanks guys. I had alot of helpful comments. I contacted both Toyota's product support and spoke with OSHA's Assistant Regional Director here in Milwaukee.

My results from Toyota's product support were that the forklift wasn't being used correctly and we should be using a Tow Tractor which is specifically designed for our needs.

OSHA a little more vague. Not really sure if using a forklift for pushng and pulling with a heavier load than the maximum lifting capacity of the vehicle is an OSHA violation. He did however say that our method of moving our loads was not safe and in itself was and OSHA violation. His suggestion was to file a complaint. That won't happen.

I went a little higher up the corporate ladder at my employer with the information I had from both OSHA and Toyota and was told that an 8000 lbs. forklift would be ordered.

Persistance pays off.