According to the Allison 3000 MH & 4000 MH Owners Manual,
"The transmission is considered to be overheated when any of the following
temperatures are exceeded:
Sump fluid 121°C (250°F)
Fluid to cooler 149°C (300°F)
Retarder out fluid 165°C (330°F)
If the sump fluid temperature reaches 128°C (262°F) the ECU will inhibit operation
in the higher ranges."
Clearly 199 F is below those ranges.
See this link for the Owners Manual: