I was at a wrecking yard today looking to buy a 3.0 liter caravan 3 speed transmission core. These were all still in the vans. I checked an 87',90' and 94' van. I pulled the diff cover on all of them and counted the ring gear several times of each one, they were all 60 tooth ring gears. I thought they were supposed to be 61 tooth ring gears in 3.0 liter 3 speed transmissions. Anybody have thoughts or insight to what I was finding?