OK,, Got my ol' 800B running serviced the COM , new filter fresh Dexron. Took it for a test. COM pressure ran about 130 psi lock -up appeared to be working good. as the temp came up pressure dropped off and of course it stopped. Shut it down and let it set, checked the fluids, OK. Started up pressure came back up, moved good and then pressure started fluctuating from 0 to 130, sometime going up to 130 and slowly back down to zero, but mostly hovered between 40 and 80 psi. Even when it went up back up to 130 the lock up didn't appear to work. Almost act like it is sucking air, but no sign of oil foaming. still waiting on my service books, until then any ideas. Thanks