They have both but mostly automatics.
All straight trucks are Automatic
it is automatic
No, not in the least. And maintenance on those transmissions is much more than it is on the manual transmissions.
No, Swift Transportation operates manual transmission trucks. In the past, they have bought limited numbers of trucks with automatic transmissions as part of a pilot program, but have not decided to phase out manuals in favor of autoshifts.
Depends on what type. Collectors/compactors almost always are automatic. Roll-off container trucks can be either automatic or manual.
The 7.3 PS had 250hp for the trucks with an automatic transmission from 1999-2003; in 2001 the power was increased to 275hp for the trucks with a manual transmission.
For the S10 and 1500, the manual was the NV3500 and the automatic was the 4L60E. For the 2500 and 3500, the manual was the NV4500 and the auto was the 4L80E. For their medium- and heavy duty trucks, manual transmissions from Eaton Fuller and Rockwell were available, while automatic transmissions from Allison were available.
Whatever the customer orders them to be. Most I've seen use an Allison automatic, but I've seen them with 8LLs and 10 speeds, as well.
I'm assuming you mean "vocational" trucks. They can be either manual or automatic... some applications more or less demand an automatic for all the stop-and-go driving they do, such as garbage trucks. Others, the owner will weigh the pros and cons of each, and decide what they think is best.In these applications, they'll typically use the Allison transmissions, which are true automatics, rather than the autoshift transmissions used in OTR trucks.
Maverick, PAM Transport, US Xpress... several companies are trying them out as part of a pilot program to weigh and measure them against manual trucks.
No. Their trucks are manual.
The S10 was available with the NV3500 manual or the 4L60E automatic... those are compatible with the Silverado 1500 trucks (except for the 454SS).