It probably made sense and has for at least a year. General Motors (NYSE: GM) and Chrysler have had merger talks, and probably had them recently. The largest car company in the U.S. has been speaking with Chrysler's owner Cerberus.The conversations may have been slowed by the wild stock market.

According to The Wall Street Journal (subscription required), "Uniting two of the country's Big Three auto makers would prove a watershed for an industry knocked down by high production costs and a looming recession."

But the plan may not work. GM and Chrysler both appear too weak position to weather the bad economy, even together. Analysts believe that GM will be low on money next year, and Chrysler is no better off.

What would make sense is that Chrysler makes a good merger partner for Honda (NYSE: HMC) or VW. Both would like a larger market share in the U.S. Both have strong balance sheets, and both could rip out duplicate costs.

Putting together two troubled U.S. auto operations gains very little for either company.

Douglas A. McIntyre is an editor at 247wallst.com.