Hi guys getting a few issue with my auto box , 1 is it seems to be taking longer to change up
2 lost total drive completely, but stop put into park and re select all good again , oil all ok , is booked for oil n filter change , only difference I’ve noticed is selector stick inside goes stiff at times , any opinions of answers on this will be greatly appreciated

If it is losing drive i would check wiring loom to the auto box, normally clipped up at the top of the bell housing.
You will have to remove the outer sheathing to the loom.
Wires can break or chafe, try pulling each wire.
This is a common problem for early B40's

Yeah did loose drive once ,,, thought it was different on the later ones