C'mon now, you've got to give us more than that.
How did you do it?
What tools did you need?
Etc. etc. etc.
Give us more information.
It's quite easy. As I have a supercharger installed, I had to do a full ECU remapping.
There are not much maps open for the Nissan Patrol/Armada, but you can use UpRev, Bitedit, WinOLS, Alientech to access the software and tune it.
Due to the supercharger installation I had to tune the air, fuel and timing etc. to get maximum performance from the engine, or get it at least even running...
But, unfortunately, the transmission was getting more and more jumpy with the performance increase, and started slipping after 650 bhp.
The transmission is mostly affected by the Torque map of the engine, so this values had to be quite accurate.
For the stock Armada/Patrol they are, but there are several other maps affecting the environmental parameters of the car, bad fuel quality etc. which have a higher priority in the Ecu that the optimal torque transferred to the transmission control module (TCM).
So, if you drastically reduce the values in this torque map (they are 4 of them to be honest) the TCM will move the cluches further away, use lower pressure and they will slip when starting, on gear changes and in full load.
If you increase the values to much- the gear changes will be early and also very firm.
So to improved the driveability without access to the TCM (have not found any solution for TCM access in this car) you can try to work with the trouqe map in the ranges where you need to have an improvement.
Additional the transmission is working a lot better after the stage 1 ECU tuning and an additional oil cooler, thermostat (have taken one from the Audi R8 for 20$) and filter installation (taken form Mercedes Unimog)- the best temperature is about 80C/176F as the transmission fluid is done after 12 000 miles (mine attached after 12 000 miles).
If you have some questions left- let me know)