ON 7/2007 I SIGNED FOR 2 BIG RIGS. THE OTHER PERSON SIGNED LEGAL PAPERS FOR RESPONSIBILITY FOR 1 RIG, BUT WAS REPO. IS IT TO LATE TO SUE HIM.

Your inquiry does not state what it is that you allege the other person did wrong and what the nature of your claims might be against him. It is not clear if the repossessed property was subject to a loan on which he alone was liable. If in doubt, see an attorney about this. Bring all of the papers.