Allison 1000 Series transmissions are torque converter driven, fully automatic, transmission systems. The 1000 Series transmissions have 6 forward speeds, NEUTRAL, and REVERSE. The fifth and sixth range has overdrive gear ratio. The 1000 Series
incorporates a variety of standard and optional design features. These design features include the following:
| • | Direct mount to engine block |
| • | Torque converter with a torque converter clutch (TCC) and integral vibration damper |
| • | 3 constant-mesh planetary gear sets with helical gears |
| • | 5 multiple disk clutches - 2 rotating and 3 stationary |
| • | Common hydraulic system for all transmission functions |
| • | 2 transmission fluid filtration systems |
| • | Electrohydraulic control valve assembly |
| • | Electronically controlled automatic gear selection and clutch apply |
| • | Fill tube/dipstick provision on both sides of transmission |
| • | Power takeoff (PTO) provision on both sides of transmission |
