the temp for the oil is low, but the temp for the gear box seems high, mine ran in the 90 deg bracket if i recall and the alarm is popping out of gear, you may have issue inside gear box, may be worth while to check it out, are there any scary noises, did you open box before using and clear any left over iron ? get a speaker magnet and put it on side of box and run it a while before pulling top off, it will draw fine to inside of box. I found too much fine in mine, before I ran it at all ! I meant to put in magnetic plug, but spaced it off till later hense external speaker mag ! the gears will eat a lot of iron without complaining but the bearings will take a beating. might check it out before it be too late. I'm reusing stock oil at this time, figuring on dex at change time, and a magnetic plug ! probably just drill it for a cyl mag and replace.
Don
IH v-3 early model owner