@ stewmair - I thought LRA policy was that parts supplied must be genuine LR. On my D3 the ZF gearbox had 'Type A' plastic pan with inbuilt filter. The pan you had replaced (by the dealer) sounds like the metal one ('Type B', that Ford Australia had for their ZF-6HP26 gearbox as fitted to some Falcon and Territory models).
As I tow 2.5T caravan regularly, I had the oil in the gearbox "double-flushed" at approx. 80 000k; sure it is expensive but well worthwhile if you want the gearbox to last the distance. I suppose if you did normal driving with mostly highway driving then keeping the 'box "sealed for life" would be the easy option.
Although Shell do sell a suitable product, it would be advisable to use ZF's own 'LifeGuardFluid 6' as it was designed for the transmission. The same oil is recommended for the D4's ZF-6HP28. Bloody expensive stuff though.
HTH


 
					
					 
				
				
				
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