Quote:
A-999
they are hydraulic controlled.
we used to have to change the spring in the valve body
to delay lock up
They use a solenoid in the trans on the valve body that has a relay in the circuit and is controlled by the PCM so I would call it electronically operated. Sure the lock-up still uses hydraulics to apply it but the solenoid closes a vent so the pressure will push the valve over. I figure your talking about the older ones that are all hydraulic as it uses gov press to move one of the valves to apply the lock-up and if you changed the spring on them it will change the speed it comes on. But I think they stopped using the fully hydraulic one by the mid 80's. Ron
Last edited by 383man; 03/21/14 12:43 AM.
