I have a 1987 300D, the transmission will not engage at all when shifted, turning the key off and on several times it will finally start working, and it works perfectly and shifts perfectly. This inclines me to believe that this is not an internal transmission problem but more of an electronics problem. Is this trans electronicallly controlled, it looks to me like it is cable shifted, so I doubt this, what else could be causing this? I am at my wits end with this thing.