General Information, Straight-Shift
Refer to the Eaton website for additional information,http://dtna.info/EatonTransmissionInfo.
Eaton Fuller 5-speed FS models are fully synchronized. They have five forward speeds and one reverse. See Fig.Shift Pattern, 5-Speed FS Models for the shift pattern.
Shift Pattern, 5-Speed FS Models

Eaton Fuller 6-speed FS and FSO models are fully synchronized. They have six forward speeds and one reverse. See Fig.Shift Pattern, 6-Speed FS and FSO Models for the shift pattern.
Shift Pattern, 6-Speed FS and FSO Models

Eaton Fuller 7-speed T models are not synchronized. They have seven forward speeds and one reverse. See Fig.Shift Pattern, 7-Speed T Models for the shift pattern.
Shift Pattern, 7-Speed T Models

These transmissions are designed for use with on-highway, fuel economy engines where a minimum of shifting is desired and less gear reduction is acceptable.