HP90 swap issue on 2020 Charger scat pack

We swapped a 2018 HP90 into a 2020 Charger Scat Pack and on the dyno with zero mph registering on the dash, the vehicle performed without an issue. Realizing we did not swap the tone rings onto the new rear axles, we fixed that after the dyno runs. While on the dyno, the trans output signal had mph so it would shift just fine as well. Driving the vehicle on the road, light throttle is okay along with wot, but if you step on it some the vehicle cuts spark and then fueling to limit it. It's showing over temp as the reason, but trans temp is only 135-158deg on the dash and log data. I also have the tcc temp raised in the tune. What is the over temp for if not the trans temp? I don't see a tcc temp pid to log either to verify a temp it might be seeing. Anyone dealt with this issue before? (built engine, procharger, hp90, circle d stall)

Share the tune and log.

Which fault codes are active?

I would suggest checking:
- Torque converter tables
- Line pressures
- Torque limits in the tune
- FAN tuned values
- Spark tables
- Slip
- Tranny oil level

DodgeBoy.
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There are no fault codes active. It triggers trans over temp protection but trans at its hottest is 156deg and I've already moved the tcc temp values up to max seeing if that's it.

Got it sorted out:drivin: Removed the 2017 HP90 trans from the vehicle and put a 2021 HP90 Redeye trans in and the issue is gone. Also, I didn't have to shut any codes off with the 2021 transmission like the 12-15 codes I had to turn off with the other one. We had tried reflashing the tcm in the 2017 trans with Dodge tool and kept giving us incompatibility errors. Interesting that not one Dodge tuner would call us back and we offered to pay for some advice or programming if that was the issue, so GFY. We never give up on figuring stuff out.

If you HP90 swap one of these vehicles, make sure you have the correct year trans for the application. :banghead:

if you would not have incorrectly called yer 2017 hp90 a 2018 hp90 i woulda been able to help : )