2016 Mitsubishi ASX 2.0 CVT – P2764, P0969, P0715, P0776 & P2719 with loss of drive/reverse – valve body or internal CVT issue?

Hi everyone,
I’m looking for some advice from anyone who has experience with Mitsubishi ASX CVTs, particularly mechanics, transmission specialists, Mitsubishi technicians or anyone who has dealt with similar symptoms and DTCs.
The vehicle is a 2016 Mitsubishi ASX 2.0L petrol with approximately 100,000 km.
I’ve done quite a bit of troubleshooting myself so far, but before spending money on a valve body or potentially a complete CVT, I’d really like to understand what is most likely causing the problem.
Initial fault
Initially, the vehicle displayed:
P2764 – Transmission Input Shaft Speed Sensor / Turbine Shaft Speed (TSS) Sensor B Circuit Malfunction
“Transmission Service Required” warning on the instrument cluster.
I subsequently carried out a CVT service and replaced both CVT filters.
During the service, I noticed a few unusual things inside the transmission:
The cartridge/cooler filter appeared to be sitting inside the mounting housing without being properly installed.
There were very small, silver, sugar-crystal-like particles in the CVT fluid.
There was also some silver-coloured paste/residue.
The transmission magnet was heavily covered with silver/ash-coloured paste.
I replaced both filters and refilled the transmission with Penrite fully synthetic low-viscosity CVTF-J4 CVT fluid, following the correct fluid-level procedure at approximately 40–45°C.
Symptoms after the CVT service
For approximately the first 1,000 km after the service, the vehicle operated normally.
However, when using cruise control at speeds above approximately 110 km/h, particularly while travelling uphill, I started experiencing a sudden jerk accompanied by an increase in engine RPM, although the vehicle maintained approximately the same speed.
More recently, while travelling at approximately 100 km/h, the engine RPM suddenly increased and the vehicle behaved as though it had gone into neutral. The “Transmission Service Required” warning appeared.
I pulled over and found that:
Reverse could still be selected and “R” was displayed on the instrument cluster.
The reverse lights were operating.
However, there was no reverse movement.
The engine RPM would increase without corresponding vehicle movement.
I was eventually able to get the vehicle home and subsequently scanned the transmission.
The following DTCs were stored:
P0969
P0715
P0776
P2719
Further checks
I inspected and cleaned the input and output shaft speed sensors located on the external CVT housing.
I also inspected and cleaned the round harness connector associated with the valve body.
I inspected and cleaned the relevant valve-body wiring and connectors, cleared the DTCs and carried out further testing.
The vehicle can sometimes operate normally, but at other times the RPM fluctuates and the vehicle struggles to move.
On some occasions, the vehicle drives normally and then suddenly experiences a loss of vehicle speed accompanied by an increase in engine RPM.
There are no unusual noises or burning smells from the CVT, and the CVT fluid currently appears to be in good condition externally.
On another occasion, P2719 returned by itself.
Overseas CVT campaign/recall information
While researching P2719 and related CVT issues, I found information regarding Mitsubishi CVT campaigns/recalls involving similar transmission control components in other markets.
The TCM part number currently fitted to my vehicle is:
8631B284
I understand that TCM part number 8631B287 has been included in a CVT-related recall/campaign in the USA, Canada and some other markets.
I have attached the information I found regarding that campaign.
I understand that this campaign relates to a different region, so I’m not assuming that it applies to my Australian-specification ASX. I’m mainly interested in whether anyone has seen a similar issue or knows whether there could be any useful connection.
What I’m trying to determine
Has anyone dealt with similar ASX/CVT cases involving these symptoms and DTCs?
Do P0969, P0715, P0776 and P2719 together point more towards a valve-body/solenoid or hydraulic-pressure issue?
Could the incorrectly positioned cartridge/cooler filter have allowed contaminated CVT fluid or metallic particles to circulate through the transmission and potentially affect the valve body or solenoids?
Considering the metallic/silver residue found on the magnet and in the CVT fluid, would you recommend inspecting or replacing the valve body or individual solenoids?
Would you recommend carrying out a CVT line-pressure test or any other specific diagnostic procedure before replacing the valve body?
Could these symptoms indicate internal CVT damage rather than just a valve-body/solenoid problem?
Does anyone know whether the Australian-specification ASX has any known CVT issues, campaigns or service information relating to these components?
Based on your experience, what would you check or test next before spending money on a valve-body or complete CVT replacement?
I’m particularly interested in hearing from anyone who has actually diagnosed or repaired a similar Mitsubishi/Jatco CVT issue.
I’m trying to avoid replacing expensive components without first confirming the actual cause.
I can provide the VIN, DTC screenshots, photographs of the CVT filters, magnet and metallic residue, TCM details, or any other information that may help with the diagnosis.
Any advice, diagnostic direction or experience with similar cases would be greatly appreciated.