New Process 205. The 205 is a part time 4WD case, meaning when it's in 2WD the front driveshaft will not receive power. It has 4 stock shift positions, 2WD Hi, 4WD Hi, Neutral, and 4WD Lo. The New Process 205 was used extensively in GM trucks, they were available in their full truck lineup from '69-'80 and then only in K30's from '81-'91.