Hi James First off calling the device which controlls the gear-change in an Auto DeLorean like yours a "computer" is like calling a lump of wood with four wheels a "car". >From what I remember it's about as simple as you can get. It simply reads off a voltage from a dynamo spun by the transmission and when (through a resistor network) a certain voltage is reached, a transistor fires the solenoid(s) to change the gear. There are of course two shift points. DO NOT think about replacing the computer, you'd be wasting $400 on a problem probably caused by a part you can buy from Maplin for 20p. I know for a fact Bob (the previous owner) used to have to jump-start that car and did it without unplugging the CG. This can cause voltage spikes to hit the transistors which shift the gears. I would bet you need to replace (one of) them. Somewhere in the archives there's instructions on putting a couple of diodes in the box to protect the transistors when jumping the car. If/when my friend and I bring these two D's over, he was really tickled by the idea of "fiddling" the CG on the auto (mine's a manual) such that you can vary the shift points with a knob on the centre console. You can also use the kick-down switch to extend the rev range over which the tranny stays in gear, and even implement a semi-automatic shifter. The electronics are gloriously simple, but we are thinking of replacing it with a proper PIC to do all this for you, and more... (waffle mode off) Martin JamesRG wrote: > Hi all, > > Thanks for all the info on my question about the CG and tranny fluid etc. > <snip>