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Hunting gears on cruise

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I will make one calibration change for an additional $100 per change. For example, changing a shift point for a given gear is $100 vs changing a shift point and a pressure setting would be $200. That value can be used towards the full custom tuning price.

 

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Fri, 09/17/2021 - 23:24
#1
Discotune
Hunting gears on cruise

Having some trouble with an engine conversion, L98 and 6L80E, the TCM OS is original to the gearbox.

2 Bar Mafless Tune, Standard engine

Full throttle shifting and tap up tap down are fine. Real road speed and logged speed is accurate.

Issue I have is that the gearbox hunts up and down gears on cruise, as if the shift scheduling is incorrect but I cannot find the issue today.

Example 1 - cruising 70kmh, pedal position stable, upchanges to 5th, then back to 4th, then back to 5th etc

Example 2 - cruising 110kmh, stable pedal, changes 5th to 6th and so on

Example 3 - crusing 50kmh, off throttle completely, downhill, changes between 3 and 4 over and over

File attached, can post various logs also

Unsure if I have a incompatible TCM OS, or a setting missed, looking forward to learning something

Tune and Log attached, irregular 4-5-4 shifting at the start on coast, and strange off throttle 3-4-3 shifting at the end

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