Don't Shoot the Horse Yet
Riuscire7, Strang behaviour occurs to the transmission when a sick engine is out in front.
Poor manifold pressure and irradic power both are enimies to the transmission.
After you have had the problem solved, either just valve stem seals or a complete cylinder head rebuild, then approach the transmission problem; it may just go away.
Happy Trails Beep Beep from Houston!!!
Donald, El Cheapo