Cam-Tech-Craig wrote:

It's always good NOT to feel any difference from any form of gearbox service... Be it a service or a flush...

I agree with Craig (I know )

The official interval from ZF is 50-75k miles, depending on use. Lower if it does frequent towing, off roading or high speed driving

If you notice a difference in gear change quality, and a general improvement in "smoothness" then the box was overdue an oil change
If you notice no difference at all, it was changed early enough

I've had 2 changes and there was a previous change on a receipt when I purchased it - no idea what they used for the first 2 but they never changed the pan as it was leaking so had the job done properly with ZF fluid. Didn't notice any change in gearbox behaviour and it's still got a slightly harsh 1-2 upshift when on light throttle. Gearbox software update made a noticeable change in gearbox 'character' although I can't say exactly what it did other than it feels better. The reset with the accelerator pedal is a temp fix for the 1-2 change harshness but it comes back after a while. Also going to WOT / Kickdown on the M-Way sometimes makes it better afterwards. My Audi which had the ZF6 speed also had a harsh 1-2 upshift and a gearbox fluid change didn't fix that either. AFAIK you only need to do a full gearbox reset if you change internals like teh TC or valves / seals - I've left well alone. 2012 TDV8 Vogue (L322)

Cam-Tech-Craig wrote:

It's always good NOT to feel any difference from any form of gearbox service... Be it a service or a flush... If the gearbox improves then its already damaged im afraid

Totally agree. If it's , it's .
I noticed no difference on the first change at 80K  Gone to a good home: 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
2025MY Defender D350 90 in Silicon Silver on coils
1974 Series 3 Lightweight = "Millie"
Many, many other Landies over the years
My preferred specialist: www.glenrands.co.uk
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kevinp wrote:

That's quite reassuring Craig. I've read of people saying there was a vast improvement of smoothness after a fluid change so I'm open minded on that one. Does it last?
The car had the gearbox adaptations reset after the first change. That made it worse and took ages to smooth itself out, so I will not be doing it again!!

TDV8_Tommy wrote:

Good to know.

This morning I dropped off Westie with an ZF-approved transmission service centre for a full flush-through.

ZF-approved are few and far between here.

The chap confirmed it’s a total oil change, done by machine - all rads and lines flushed.

Can’t wait to get her back for a drive.

Hey harleyman, no worries. Mine is 440€+ IVA so 534€ all in.

https://aftermarket.zf.com/en/aftermarket-...er-finder/ Is the link to find an approved ZF service centre.

I know probably any old garage could service the ‘box, but I wanted ZF approved for peace of mind. 2012 4.4 TDV8 Westminster - Baltic Blue, Jet interior
1997 P38 2.5 DSE auto & 1998 P38 2.5 DT Manual
1988 Vogue 3.5 EFI - Manual, gone.
2004 Volvo C70 2.0T convertible, had since new.
2007 Mazda MX-5 2.0 Sport Roadster/Coupé, had since new.
2024 Mini Cooper S cabrio, JCW kit, 2.0, DCT auto

Thank you 2012 Range Rover 4.4 tdv8 Autobiography