The market for the biggest of the big trucks remained healthy in May.
Sales for Classes 4 through 8 medium and heavy-duty trucks in the United States rose 16.3 percent compared with May 2004.
Class 8 trucks jumped 29.7 percent year over year. Class 7 improved 15.6 percent in May.
Smaller trucks did not fare as well. Classes 1 through 3 dropped 9.0 percent last month. That dragged down the total for all classes, which fell 8.0 percent to 836,045.
Through the first five months of the year, 3,833,839 trucks were sold - a decline of 1.8 percent from 2004.
Class 8 trucks have performed best for the year. They are 33.9 percent ahead of the year-ago period. Class 7 is up 31.7 percent. Classes 1 through 3 fell 2.8 percent in the January-May period.
DaimlerChrysler AG's Freightliner unit was No. 1 with sales of 10,594 trucks in May, up 26.6 percent. International was second with 7,732, an increase of 14.1 percent. The Ford brand dropped 19.7 percent and ranked third with 5,152.
Freightliner also is tops in year-to-date sales with 49,067.
International is second with 44,166, and Ford follows with 24,755.