General Description

The HYDRA-MATIC 3L30 is a fully automatic transmission for rear wheel drive vehicles which provides three forward gear ranges and a reverse.

The major components of this transmission are:
- Torque Converter Clutch Asm.
- Gear Type Oil Pump
- Low Band Asm.
- Three Multiple Disc Clutches
- Planetary Gear Set
- One Sprag Clutch
- Valve Body Asm.

The oil pressure and shift points are controlled by a vacuum modulator that senses engine torque as a relation to engine vacuum.

The transmission can be operated in any one of six different modes.
P - Park position prevents the vehicle from rolling either forward or backward. (For safety reasons the parking brake should be used in addition to the park position).
R - Reverse allows the vehicle to be operated in a rearward direction.
N - Neutral allows the engine to be started and operated without driving the vehicle. If necessary this position may be selected if the engine must be restarted with the vehicle moving.
D - Drive is used for all normal driving. conditions. It provides three gear ratios plus converter clutch operation. Downshifts are available for safe passing by depressing the accelerator.
2 - Manual Second is used to provide acceleration and engine braking. This range may be selected at any vehicle speed.
1 - Manual Lo is used to provide maximum engine braking. This range may also be selected at any vehicle speed.