Had some shifting difficulties with an '83 300D. Replaced the plastic shift arms. Now, shifting is erratic - sometimes perfect - sometimes rough. If I keep it floored, it's much, much smoother than if if I go easy.
If I take it easy, shift points vary with the throttle position. In this case. the tranny usually will only stay in second gear for a few seconds before shifting into 3rd -- much too early. I realize this description isn' much to go on.
Any thoughts??