With the expectation of the deal still closing during the third quarter, Cox Automotive announced late on Monday that it has voluntarily withdrawn its filing under the Hart-Scott-Rodino Antitrust Improvements Act as amended to complete its proposed acquisition of Dealertrack Technologies.

The company indicated that it made the decision in order to provide the U.S. Department of Justice with additional time to review acquisition details.

As previously announced on June 15, Cox Automotive and Dealertrack have signed a definitive merger agreement under which Cox Automotive will acquire Dealertrack in an all-cash transaction valued at $4 billion, or $63.25 per share, subject to certain conditions set forth in the agreement.

Officials explained a new waiting period under the HSR Act will begin when Cox Automotive resubmits its HSR filing, which is expected to occur on Wednesday.

“Cox Automotive and Dealertrack continue to work cooperatively with the U.S. Department of Justice staff in their review of the proposed transaction, and expect to close the transaction in the third quarter of 2015,” Cox Automotive said.

Cox Automotive president Sandy Schwartz had acknowledged in a recent interview that tasks ahead are going to create a busy time for company executives, managers and staff during the remainder of the year as they finalize the $4 billion acquisition of Dealertrack.

However, Schwartz emphasized the focal point for meeting agendas, project lists and other endeavors consistently will be about what will help dealers become more profitable.

“There are so many things we could do that are neat and make sense, but this is going to be all about prioritization,” Schwartz said.

Meanwhile, in another interview, Dealertrack co-president Raj Sundaram had emphasized the company’s commitment to its client base. According to the Dealertrack’s first-quarter financial report, 20,661 dealers use the company’s technology, as do another 1,557 finance companies.

“The message is this is an exciting opportunity from the standpoint of the benefits of this transaction are going to offer dealers and how we’re going to help dealers execute on their vision. The combined capability we’re going to bring is going to be tremendous for dealers to continue to thrive,” Sundaram said.