[Tf175]

Actually there is no air going to the shifter . There is a line from the trans to the shifter via the accumulator,  and another back to the sump . Tim kindly sent a manual that covers this particular shifter including the accumulator pressure , 90 psi . So far today the shifter is working , 500 or so miles to go , hopefully we can get to the barn as is . We have nitrogen in the trailer , I can fill accumulator if needed .
Thanks for the response ,
Chris