2006 Jeep Grand Cherokee with the 3.7L V6 Transmission Overheating

[F Clayton]

Super strange, I have a 2006 Jeep Grand Cherokee that has the 3.7L V6. All has been good with it. I recently upgraded to 32" mud tires and last few days, when the truck is parking and idling, I'll get a transmission overheating warning that will come on. As soon as I start driving the truck, all goes away.

Now, I do shut the truck off first, then start driving. Either way, it's fine when I'm moving. But when still at idle and parked, it overheats.

The only thing I have done is added larger wheels and tires. But that wouldn't make a difference when parked right?