the present disclosure in order to eliminate the need for an accelerated application valve the activity carried out by accelerated application valve is incorporated into the slide valve function with reference to fig4 a 4j a slide valve bushing 70 replaces an existing abdw type bushing bushing 70 is installed in valve body 10 such that the slide valve seat faces the mounting face of the accelerated application valve as best illustrated in fig4 d bushing 70 includes a plurality of recessed passages 72 extending around at least a part of the external perimeter of bushing 70 the plurality of recessed passageways 72 are separated axially along a longitudinal extent of the bushing 70 plurality of recessed passages 72 is adapted for providing fluid communication between various air passageways within valve body 10 depending on the orientation of the slide valve the plurality of recessed passageways 72 of bushing 70 route the air to the appropriate air passageway additionally as further illustrated in fig4 d bushing 70 includes a plurality of through passages 74 extending radially through at least one side of bushing 70 the plurality of through passages 74 are separated axially along a longitudinal extent of the bushing 70 several slots 76 are provided along the longitudinal length of bushing 70 for providing fluid communication with the vent valve the brake pipe and the exhaust valve fig5 shows bushing 70 inserted into slide valve opening 34 on top.