Having read all the articals I can throw several spanners in the works.
When I had the annual serive in march on my LR4 I was advised that next year (year 9) I will have to have transmission oil and filter changed at a cost of £600 plus VAT = £720. He also said that LR recommed this at year 9 or 144,000 miles by which time the box is shot at. Being keen on perventive maintenance I shopped around and found a Company would do a back flush and oil change for £385 plus 20% VAT. This sounded a great idea so had it done at 91k miles but since then when going down hill at 5-10 MPH the engine revs drop to tick over (750 RPM) then transmission drops out and car runs away with no engine braking. So far I have thrown nearly £1000 at it but the problem is still there, has anybody else had this problem. I do have a failure warranty so next is to see if they will pay for the box to be replaced.
Having looked at the ZF web site they recommend oil and filter change at 100,000 KM (60.000) miles or sooner if used for towing.
I have spoken to a guy who specialises in all auto boxes and the first thing he said was DO NOT CHANGE TO A METAL PAN as the plastic pan is designed to dissipate the heat far better. When changing the oil the old oil must be flushed out of the torque converter as not all the oil will be changed by draining the pan. Therefore you have a mix of old oil and new oil which is not ideal.
I feel the reason that LR don't recommend an early oil change is because you have to lift engine / gearbox to change the plastic sump due to the chassis cross member a £652 job.
When I had the annual serive in march on my LR4 I was advised that next year (year 9) I will have to have transmission oil and filter changed at a cost of £600 plus VAT = £720. He also said that LR recommed this at year 9 or 144,000 miles by which time the box is shot at. Being keen on perventive maintenance I shopped around and found a Company would do a back flush and oil change for £385 plus 20% VAT. This sounded a great idea so had it done at 91k miles but since then when going down hill at 5-10 MPH the engine revs drop to tick over (750 RPM) then transmission drops out and car runs away with no engine braking. So far I have thrown nearly £1000 at it but the problem is still there, has anybody else had this problem. I do have a failure warranty so next is to see if they will pay for the box to be replaced.
Having looked at the ZF web site they recommend oil and filter change at 100,000 KM (60.000) miles or sooner if used for towing.
I have spoken to a guy who specialises in all auto boxes and the first thing he said was DO NOT CHANGE TO A METAL PAN as the plastic pan is designed to dissipate the heat far better. When changing the oil the old oil must be flushed out of the torque converter as not all the oil will be changed by draining the pan. Therefore you have a mix of old oil and new oil which is not ideal.
I feel the reason that LR don't recommend an early oil change is because you have to lift engine / gearbox to change the plastic sump due to the chassis cross member a £652 job.