Originally Posted by optimusprime

You need to do a transmission shift cable adjustment .If the cable is set to tight [no play] it will want to drive off .Or the small micro switch in there for the throttle quadrant is broken inside. And the computer thinks its still on drive settings .Look inside the hood to the place the linkage goes to the fuel flap ,look for a switch see if it clicks on and off as you open the throttle . I will find a picture if i can

Originally Posted by sixto

I'm confused:

'84 SD with '83 engine and '82 transmission = what computer?

Control pressure cable tension doesn't affect TC stall so it can't affect how much the car creeps in D while idling. Neither does modulator vacuum. The transmission doesn't know the brakes are applied.

Maybe the tachometer is reading low. Way low.

Sixto
83 300SD for sale
98 E320 wagon