fluid pressure and communicate the pressure to the front axle control unit 42 and ultimately to the master control unit 20 as shown in fig1 the second electro hydraulic actuator 24 may be in communication with a brake caliper 56 associated with the left front wheel 58 of the vehicle by way of fluid line 60 fluid line 60 may be in fluid communication with the master cylinder 14 by way of fluid line 54 and the second normally open solenoid valve 32 pressure sensor 46 may be positioned on fluid line 60 to monitor the hydraulic fluid pressure and communicate the pressure to the front axle control unit 42 and ultimately to the master control unit 20 referring to fig2 the electro hydraulic actuators 22 24 only unit 22 is shown in fig2 may include a motor 62 e g an electric motor having a shaft 64 extending therefrom an actuator housing 66 having a central bore 68 extending therethrough and a piston 70 closely and slidably received within the bore 68 to define a hydraulic fluid chamber 72 within the housing 66 a gear assembly 74 and a high efficiency screw 76 may be provided to translate rotational torque from the shaft 64 of the motor 62 into axial movement see arrow a of the piston 70 within in the bore 68 in addition the motor 62 of the electro hydraulic actuators 22 24 may contain a mechanical or electro mechanical brake mechanism not shown that can lock the shaft of the motor and thereby prevent unwanted back driving of the gear and ball screw mechanisms even when the electrical.