had the same issues with a 904 with a TA transbrake VB,,,untill I talked to Rick Allison from A@A and he sold me a new line pressure regulator spring and gave me the length dimention to install it at and all my troubles went away, and the TA worked perfect from that day on.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
