my automatic trans produces temps that I don't like to see. Either my gauge is broken or something is seriously wrong.

If i'm driving on the highway no load (other than the truck itself and me...and I don't weigh THAT much ) I may see temps as high as 220*f. That's driving about 65 with windows open.... engine temp is "normal" (just about the the cold mark). I think its definately time for a larger cooler but is this the cause of the problem or does it sound like I have a larger underlying problem?

Thanks,
Al

 

I'm no tranny expert but it sounds like you must have a plugged cooler or lines somewhere not allowing fluid to move. I'd be checking that first, as it wouldn't be too hard to do.

 

mine run's 210 to 220.but it runs there with or without my trailer and car

 

Mine runs about 160* unloaded in 90* outside temps.

I think your cooler is plugged, fluid is old, or filter is getting old.

I have a bigger cooler though...