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Message: [QUOTE="Mark Kovalsky, post: 1162325, member: 1654"] There are no springs in the torque converter to help it lock or unlock. It uses pressure to unlock, and pressure to lock. When unlocked valves in the valve body route fluid pressure between the clutch plate and converter cover. This forces the plate away from the cover and the converter is unlocked. When it locks the valve switches the flow so that the pressure between the plate and the cover is released and pressure is now routed to the back side of the clutch plate. This pressure holds the plate against the cover and is required to have enough clamp force to keep the clutch from slipping. Attempting to lock below 1300 RPM may result in insufficient pressure to keep the plate clamped to the cover. Without enough pressure it can slip, and a slipping clutch is a dead clutch. [/QUOTE]

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