Having transmission problem with daewoo G25E-3 KP0774 transmission works great when cold but slips in forward and reverse when warm. Clutch pressure drops to 35 psi when warm. Transmission was rebuilt a year or so ago. Have been through control valve but no change. Acts like a relief valve sticking to me since problem is in both directions, inching spool seems to be returning fully. Anybody run in to this problem before?