I’ll have to put in a request - usually I get a crazy in answer in Chinese that I can’t make heads or tails of but let’s see  2012 Range Rover HSE | 2011 Range Rover Autobiography | 2010 Range Rover Sport Supercharged
2020 Tesla Model 3 Performance, 2013 Mercedes-Benz G550, 2008 Ferrari F430, 2007 Volkswagen Touareg V10 TDI

JayGee wrote:

Why doesn't it adapt over time (self calibration) ?

A better explanation than mine.

Hysterical about the police pulling you over! I worry the same thing around DC but I’ve been luck so far. Similar results - totally transformed the shifting strategy in my 2012. Which had abrupt 2-3 and 3-2 shifting.

Of course it’s tedious and stressful if you don’t live somewhere more isolated. As the procedure I posted mentions, finding a hill to use during coasting/decelerating is a huge help. Otherwise you will be rolling forever and it really don’t want to downshift to 1st gear  2012 Range Rover HSE | 2011 Range Rover Autobiography | 2010 Range Rover Sport Supercharged
2020 Tesla Model 3 Performance, 2013 Mercedes-Benz G550, 2008 Ferrari F430, 2007 Volkswagen Touareg V10 TDI

Quote:

Hysterical about the police pulling you over! I worry the same thing around DC but I’ve been luck so far.

Danb_220_2019 wrote:

JayGee wrote:

Why doesn't it adapt over time (self calibration) ?

The ZF control strategy relies on two separate sets of adaptations. There's a base adaptation map, which is what is reset by diagnostics. This is intended to allow the calibration of the adaptations to an individual gearbox, which due to manufacturing tolerances and subsequent wear levels in components will differ from unit to unit. Even small deviations in pressure and flow can cause substantially different shifting behaviour and affect the lock-up behaviour.

Then there's the driver adaptations; these are constantly learned and re-learned during different drive cycles, allowing the transmission to adapt its behaviour to the driving style - but it will only work effectively on a transmission which has proper base calibration.

Running the correct base adaptation re-learn procedure is essential to allow the transmission to work at its optimum; resetting the adaptations and then driving the car will allow a calibration to happen but it will never be optimal.

I undertook the ZF base adaptation procedure on my BMW 645Ci. It involves a series of acceleration and coast events and some other stuff, and took over an hour and about 50mi to complete, done at 2am on a quiet motorway. It totally transformed the box's behaviour at 115K miles on old fluid.

After some work on the gearbox (fluid, seals, mechatronics rebuilt) I did the same process again at 125K miles and the operation of the transmission became like a brand new unit even though the rest of the internals were 125K miles old.

Annoyingly I had to do it twice the second time, as during the process a copper pulled me over and asked what the hell I was doing coasting to a stop on the hard shoulder... I explained and he ticked me off for using the hard shoulder for a non-emergency, but thanked me for being sensible enough to do it in the middle of the night and then told me to crack on, but I had to reset the adaptations and start again as I'd turned the ignition off.

Thanks - that was the answer I was looking for  2012 TDV8 Vogue (L322)

GraemeS wrote:

Gap added the function in response to my enquiry if they might be able to provide it at some stage. The tool invokes a standard capability of the CVD module that Gap knew about but hadn't programmed.

LOL - this is starting to read like my work emails 2012 Range Rover HSE | 2011 Range Rover Autobiography | 2010 Range Rover Sport Supercharged
2020 Tesla Model 3 Performance, 2013 Mercedes-Benz G550, 2008 Ferrari F430, 2007 Volkswagen Touareg V10 TDI

I was provided with a bespoke tool update which I assumed would be incorporated into the next release version. I'll check the tool later to confirm that the function is still there and take a screen print. I also had a version that included the function to recalibrate the e-diff, which I needed after the retrofit around 5 years ago but the CVD calibration inquiry was some time later.
Correspondence was by email.

I've run a CVD calibration on my 2012 this afternoon. 10s countdown during the process then 'process complete'.

Doesn't seem to have done a lot, though. 2012 (L322) 4.4TDV8 Vogue SE, RSE, Fuji White over Arabica.
Previous V8s: BMW 645Ci, P38 4.6, P38 4.0, Merc CL500
Previous others: Honda x1, Volvo x7, Rover x6, BMW x6, Ford x1, Mercedes x2, Skoda x3, VW x2, Renault x2, Citroen x1, Mazda x3, Nissan x1, Audi x3, Kia x1, Fiat x4, Subaru x3, Austin x2, Triumph x2, Jeep x2, Hyundai x2, Lexus x1, Mitsubishi x1, Saab x2... and some others I've forgotten!

Same but my ride is pretty good and the adaptive dampers are working correctly. I recently replaced the two front struts with OE Bilstein so I thought it would be good to run a calibration. They’re usually getting 1.5amps around town 2012 Range Rover HSE | 2011 Range Rover Autobiography | 2010 Range Rover Sport Supercharged
2020 Tesla Model 3 Performance, 2013 Mercedes-Benz G550, 2008 Ferrari F430, 2007 Volkswagen Touareg V10 TDI

Been reading up about gearbox adaptation for the ZF8HP in the 4.4 TD V8 and it seems it's not the same as the ZF6HP in the 5.0. 2012 TDV8 Vogue (L322)

Danb_220_2019 wrote:

I've run a CVD calibration on my 2012..

JayGee wrote:

Been reading up about gearbox adaptation for the ZF8HP in the 4.4 TD V8 and it seems it's not the same as the ZF6HP in the 5.0.

I don't see a description of the adaptation procedure for the ZF8HP. 2012 TDV8 Vogue (L322)

I don’t see one from ZF either. Perhaps they got rid of the stupid drive cycle - that would be nice.

Either way, it is evidence that reseting adaptations post fluid change can solve bad shift behavior, and I hope that’s something you will try! Nothing worse than a badly shifting auto. ✌️ 2012 Range Rover HSE | 2011 Range Rover Autobiography | 2010 Range Rover Sport Supercharged
2020 Tesla Model 3 Performance, 2013 Mercedes-Benz G550, 2008 Ferrari F430, 2007 Volkswagen Touareg V10 TDI