Transmission General Description

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
• Flexplate drive
• 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
• Parking pawl
• Power takeoff (PTO) provision on both sides of transmission