Disco 1 Autobox strange behaviour

97 auto (not mine) oil and filter changed yesterday due to the following symptom(still occuring): ... it doesnt take off in D, it starts only if 1'st is selected then in D works as it should changes well up/down on it's own...untill it's stopped...then 1'st is needed again to take off...any ideas

You've probably already checked, but maybe wear on the selector lever system? Not engaging "drive" until you've gone through the selection point and back again.
If you can write everything you know about auto boxes on a postage stamp, that's more than me.

Copied from Ashcroft's transmissions Q&As.
I have a 4sp ZF, when I select "D" the vehicle won't move, when I select "1" the vehicle moves off. I can then select "D" and continue to drive normally. If I stop I have to start in first again. Why?
A sprag clutch has "inverted" and will need replacing. No further damage will occur if you continue to drive but you will need to select "1" every time to start moving. A rebuild is required to correct this.



Sent from my iPad Air on a train.

In this case, I'd go with what Discool said, he knows more about D1s than me.

discool said:

Copied from Ashcroft's transmissions Q&As.
I have a 4sp ZF, when I select "D" the vehicle won't move, when I select "1" the vehicle moves off. I can then select "D" and continue to drive normally. If I stop I have to start in first again. Why?
A sprag clutch has "inverted" and will need replacing. No further damage will occur if you continue to drive but you will need to select "1" every time to start moving. A rebuild is required to correct this.



Sent from my iPad Air on a train.

Click to expand...

Much obliged sir.... that's spot on