Hello everyone! I'm hoping to find somebody that can shed a little insight on a problem I've been having with this transmission. It's just being rebuilt with new valve body pump solenoid pack and all new clutches was working just fine when it started shifting strange and slipping in the lower gears . Po733 which is third gear slipping I didn't let it slip enough to hurt the clutches but for whatever reason it shows po868 code which is low line pressure I've changed the pressure sensor transducer the wiring looks fine could it be a computer issue? Anybody else that's had this problem would greatly appreciate any insight. thanks in advance!

 

Is there a port to manually check line pressure to check it?