isspro trans temp wrong or ?

[strokedually]

hi im wondering if i have a bad gauge or sending unit i have a the isspro ev2 gauges they all work but the trans seems to be off it takes 20 mins of driving to show a reading above 100 degrees and when it does it only goes to 120degrees at the most towing is this normal or is some thing wrong gauge is 2 weeks old and its a 99 f350

[driximus]

Whats the outside Temps? My tranny takes a bit to register a temp also when it is cold.

[BArakus]

thats the same thing my tranny gauge does. when its real cold (-30F), it doesn't even tell me anything.

[Raul@Stealth Automotive]

all depends on how cold it is..

[strokedually]

makes sense its been around 25 degrees during the day and at night and morning around 5 to -10 im up in minnesota could this tmp reading be ok then and it only gets up to 120 degrees seems kinda low to me im new to this

[strokedually]

the trany temp gets to 120 that is

[Ryan Rønning]

The temp outside plays a huge difference in the trans temp. The colder it is the cooler the trans will run and the longer it will take the temp to registrar

[countryraised]

you are OK I'm in Iowa I see the same thing, usually tranny temp is close to outside temp +100.