| yeah, you can see that much change in temps. What kind of driving you doing when towing? are you on and off the throttle going in the mountains or up and down hills? If so, put it into tow/haul (if you have it on your truck...can't remember when they put that in the trucks) and you will see a reduction in trans temp since the torque converter is locked up. Also, another thing to think about is when was the last time you serviced your tranny? This would be a drain and fill of the fluid and changing the spin-on filter.
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