The Dodge Viper’s signature characteristic--speed--does not appear to be a hallmark of its potential sale.

Chrysler said Tuesday that it has received three proposals for the Viper business unit, which includes the car, workers and a factory in Detroit. But a sale does not appear likely before the company sends in its viability plans to the government by March 31, vice chairman Jim Press said.

Chrysler also has to submit an immediate restructuring plan by Feb. 17.

Press said the company is “doing due-diligence” as it weighs offers for the V10-powered halo car. It previously told the government that it would “monetize” the Viper operation as part of its plans moving forward.

Press has said that Chrysler’s investment dollars are better spent on more core products, and that retaining a stake in the business is not a condition of the sale.

Chrysler sold 127 Vipers in January, up 74 percent from a year ago, it said Tuesday. Last year, the automaker sold 1,172 of the cars.