Ahead of you already, added Hayden 677 trans cooler when I installed radiator.....I'm wondering if the previous owner installed a higher temp thermostat, The needle does move down as thermostat opens. We got the VX for cheap (basket case) and we have noticed a few things were "Mickey Moused" together. We're all to familiar with the woes of the VX, this is our second, gives my son and I something to do