The smaller ones are in medeum heavy duty trucks. It's a five speed with two ranges. Shift through the patern, flip the range switch and run the patern again. It's big brother can be found in large trucks in the 13 and 18 gear version. The early versions were 9 speeds. I'll see if I can find a site that caries them and link it back later.
"The Constitution is not an instrument for the government to restrain the people, it is an instrument for the people to restrain the government."
-Patrick Henry
A5150nut
2006 K3500 D/A
94 6.5 4x4 5spd Sold