on the back of the car tha is attached to the frame with a link that attaches to part of the suspension. this senses when a load is in the car by its position and signals the pump to send more fluid to lift the rear of the car. check this, it may be stuck.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.