The U.S. Postal Service used “faulty” assumptions in limiting its purchase of electric mail-delivery trucks in its $6 billion fleet replacement plan, a top House Democrat said April 5.

The U.S. Postal Service announced March 24 it ordered more than 10,000 new electric delivery trucks, up from the 5,000 the agency had initially planned to purchase.

House Democrats are asking the U.S. Postal Service’s inspector general to investigate the agency’s decision to replace its mail-truck fleet with almost all gasoline-powered models, a move that paved the way for a contract with Wisconsin military truck maker Oshkosh Corp. worth as much as $6 billion.

Oshkosh Defense announced the U.S. Army Contracting Command awarded it delivery orders totaling $346.4 million to modernize vehicles in the U.S. Army and U.S. Army Reserve Heavy Tactical fleets.

Oshkosh Corp., a manufacturer of specialty vehicles and vehicle bodies, named Wilson Jones as its CEO, effective Jan. 1.

Oshkosh Corp. won an initial contract Aug. 25 from the U.S. Army for its new Joint Light Tactical Vehicle, a $30 billion program.

Oshkosh Corp. reported its fourth-quarter net income more than doubled from a year ago as gains in commercial and access equipment sales offset a decline in military truck sales.

Specialty truck maker Oshkosh Corp.’s fiscal third-quarter profit dropped from a year ago as lower sales in the defense, fire and emergency segments outweighed gains in the commercial and access equipment sectors.

Oshkosh Corp.’s fiscal third-quarter income nearly doubled on higher access-equipment sales.

Oshkosh Corp.’s first-quarter income rose to $46.2 million from $38.9 million a year ago, the specialty truck maker said Friday.