nv 4500 tranny will not go in reverse unless I turn off the truck and is veryy hard getting in any other gear at a dead stop. OK when moving. I had recently put a new valair 450hp clutch. And also just replaced the slave cylinder about a month ago because of this same problem but not as bad. It seemed to help for a few weeks. I dont know if its somthing in the tranny or if the rod going to the clutch pedal needs to be lengthened for slightly more travel in the clutch? any help is greatly appreciated :bang