Tire Size affecting the speed sensor

I had posted earlier that I was having issues with the transmission on my 1995 Dodge Caravan. I have had another mechanic look at the car. He also ran the regular tests and found nothing off. However he noticed that I had had new tires put on my car recently and that they were the wrong size for the car. He asked if the problem I was having started after the tires were changed and I said yes. Is this anything anyone else is familiar with???

What are the transmission issues? Posts tend to disappear quickly around. Rather than starting a new thread try posting a follow up to the original thread to move it to the front of the queue.

What is the correct tire size for the van? It should be on the door sticker with the recommended tire pressure. What size are the tires on the van? Are all the tires on the van the same size or different sizes?