dexron wont hurt the system ,it will run on it as good as any other oil, its the same pump and box type as fitted to earlier models and defender that do use dexronThanks guys, the bloke I bought it from was putting dex III in. I suppose I'll have to try and get it all out.
Well, I've answered my own question. It's duff, there was no circulation in the reservoir, it just wasn't pumping the fluid at all. So I've swapped it for the old leaky one, which bled itself almost. So weekend wasted and the headache of trying to get a refund to follow.I spent this afternoon fitting the pump, no issues fitting it but now steeering is really heavy. I bled the system by lifting the front end and moving the wheel from lock to lock until there's no more bubbles. then I tried using the bleed screw on the steering box, with the screw open the fluid in the resevoir rises to the point of overflowing which I could stop by closing the screw and the fluid would return to its previous level. have I bought a faulty pump?
Use the correct Land Rover PAS fluid. It's a greenish colour and a bit pricey.