Have you checked the shower pickup and shower flow recently?
I imagine it would be good to confirm as best you can whether the reservoir was overflowing due just to thermal expansion or if air ( or even water thought you said it didn't look like it) was getting in there.
Does your drive have a RW pump in it? When you blocked off RW flow route from the drive and cut the hose on the engine side, was a drive RW pump with impeller still in place stil pumping and just draining out the drive & possibly helping cool? If the impeller deteriorated , that could conceivably affect drive temp. Of it was still pumping but drainage got blocked perhaps that could put water pressure on gear case seals? No idea if any of that could apply to what you have though
Had another thought about the easy "loose" steering.- If the drive is now getting excessively hot, any old stiff grease on pivot points could now be much less viscous, lowering resistance to movement there.
I imagine it would be good to confirm as best you can whether the reservoir was overflowing due just to thermal expansion or if air ( or even water thought you said it didn't look like it) was getting in there.
Does your drive have a RW pump in it? When you blocked off RW flow route from the drive and cut the hose on the engine side, was a drive RW pump with impeller still in place stil pumping and just draining out the drive & possibly helping cool? If the impeller deteriorated , that could conceivably affect drive temp. Of it was still pumping but drainage got blocked perhaps that could put water pressure on gear case seals? No idea if any of that could apply to what you have though
Had another thought about the easy "loose" steering.- If the drive is now getting excessively hot, any old stiff grease on pivot points could now be much less viscous, lowering resistance to movement there.