1989 Dodge B250 camper van hitop with 318 engine, and I think it’s an A727 transmission. Not sure if it has a trans cooler. Bought it last year and am in the process of fixing it up and learning its quirks. It has a transmission fluid temp gauge, and I’m wondering what the “normal” temp ranges are. I’ve noticed temps in the 180-190 range last summer. Today, on a long (90 minute) highway drive, at 60 mph, with an outside temp of around 45, the max gauge reading near the end of the trip was about 145 deg.
I guess my question boils down to: what is the temp at which I should start to worry? Is the 180-190 range normal/acceptable for summer driving?