There are many places for engine and transmission fluids to leak: Oil drain bolt, oil pan seal, rear crankshaft seal, oil punp/crankshaft seal, oil pump gasket, oil cooler line banjo bolt gaskets, oil cooler lines, oil pressure sender, oil filter bracket assembly, distributor shaft oil seals (internal and external), camshaft cover gaskets, and camshaft washers.

Most of the photograghs were copied off the internet.

Also check the transmission axle seals.