Interestingly enough I was lubing the throttle linkages today on the 300D (had never done it before) and now I across this thread.

The diesel pedal seems to have a smoother action now, except the transmission now won't downshift, and if I dont hit the kickdown switch, the engine will rev only to about 2200 RPM through all the gears and be very very reluctant to go past that unless I force it to downshift with the shifter...I used valvoline chassis grease, perhaps I went overboard/used too much? Anyways it's too dark out now I will have to check it out tomorrow afternoon, maybe one of the linkages didn't seat back down properly or something.

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1985 CA 300D Turbo , 213K mi