There are new, and growing concerns over the “Cash For Clunkers” federal rebate initiative.
Car dealers from New York to Texas are pulling out of the program because they say they aren't getting paid.
"We're probably owed about 45 million at this point," said Mike Jackson of AutoNation.
Car dealers across the country say they've made deals that hinge on a government refund but still haven't been reimbursed.
"We have well over a quarter million dollars right now invested. We think that hopefully soon we'll start to get more of that money," said Toyota dealer John Tyburski.
Estimates from the National Automobile Dealers Association show that nationwide tens-of-thousands of "clunkers" contracts are still pending with millions of dollars hanging in the balance.
“The dealers have advanced this money on behalf of the customers, that's money out the door that the industry is now trying to collect from the U.S. Government,” said Jackson.
On Wednesday, Transportation Secretary Ray LaHood aggressively defended the program.
He is urging frustrated dealers to tap the brakes when it comes to their concerns about a payout.
"They're going to get their money, we have the money, Congress provided the money they're going to get their money," said Secretary LaHood.
The CEO of America's largest auto retailer, AutoNation, agrees.
And says part of the problem has been the overwhelming response.
"It is so successful beyond everyone's expectation that the Department of Transportation was not prepared to deal with this unbelievable surge. They are on it, they are adding more resources every day," Jackson said.
The National Highway Traffic Safety Administration is, in fact, in the process of tripling the number of employees working to process claims.
Work that can't come fast enough for dozens of dealers still struggling to stay in business.