The problem: The trani shifts smooth as glass when cold, up and down.
But after fifteen minutes,as the trani heats the down shift starts to go bad, thump when coming to a stop.
The vacuum system is tight. runs at 19Hg and will hold all night. The heater is all rebuilt(new pods through out). The modulator holds vacuum.
Is it possible the modulator hangs up when hot. Is it possible to lube the modulator piston? Would that help?
On these cars is perfection even possible?
Thanks for your comments and past help. Without this board I could not have the pleasure of driving this car.

__________________
1984 300SD turbo 126
"My true love"

God made me an atheist and who am I to question His wisdom