I'm now in 4th gear with power to spare!
Join Date: Sep 2016
Location: Poole, UK
I've just been going through a full service on mine (engine, diffs, gearbox etc..) as I opened the rear diff to inspect the oil and it didnt look good in there. According to Nissan the gearbox is one of these sealed for life units and they do not recommend a service interval for the oil. However they did say if there was a fault they would then consider getting the oil changed. The oil is expensive, Nissan recommend only using their product and only sell it in 20 litre cans at a price of £330! If I remember correctly you need just over 10 litres to do a full flush and change. There may be another just as good oil that you can use but you never know exactly what Nissan put in the oil to know if it really is needed or if it is a con.
I do get a little slip on my gearbox, mainly when I am going up hill and go quickly to 3/4 throttle but not so much throttle that it kicks down. The worst I had was a jump in revs from 2,000 to 3,000 without a gear change and it felt like a clutch slippage for 2-3 seconds before sorting itself out. For this reason I am changing the oil next weekend.