Mort Posted April 13, 2013 Share Posted April 13, 2013 Having replaced these valves and set them to 60psi each with a gauge I can't get the split to work properly. Has anyone got any ideas on other pressure settings? Quote Link to comment https://www.bigmacktrucks.com/topic/30796-replaced-air-pressure-reduction-valves-on-transmission/ Share on other sites More sharing options...
j hancock Posted April 13, 2013 Share Posted April 13, 2013 The o rings in the shifter mechanism on top of the trans. may be a little tired from corrosion or age. So the extra psi going to them before made them work ok and overcame the bypass leakage.Now that the psi has been returned to oem specifications they are probably acting sluggish and slow.May be time to get the o ring kit and tune it up.Jim Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/30796-replaced-air-pressure-reduction-valves-on-transmission/#findComment-177676 Share on other sites More sharing options...
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