c auxiliary fluid lines 11 12 13 a flow divider combiner spool 2 received within a spool chamber not shown and a control compression spring 10 additionally and conveniently the fluid control valve 1 comprises a solenoid operated 3 way selector valve 3 as shown in fig4 auxiliary fluid line 11 connects the flow divider combiner spool 2 to the reservoir 14 as well as linking the selector valve 3 to the reservoir 14 auxiliary fluid line 12 provides a pressure connection between the selector valve 3 and the charge pump 4 whereas auxiliary fluid line 13 connects the flow divider combiner spool 2 to the selector valve 3 the fluid passing through auxiliary fluid lines 11 12 and 13 is at a lower pressure than the fluid in supply line 8 referring now to fig1 to 4 the flow divider combiner spool 2 comprises a high pressure shuttle type spool the position of the spool 2 in the spool chamber 21 is selectable by an operator when the flow divider combiner spool 2 is in the first position as shown in fig2 unrestricted flow is allowed between the transmission pump 5 and the motors 7 the flow divider combiner spool 2 is biased in the first position by the force of the compression spring 10 auxiliary fluid lines 11 and 13 are connected while blocking any connection between auxiliary fluid lines 12 and 13 this enables the compression spring 10 to control the.