I installed a Hayden transcooler with thermostatically controlled fan on the side of the transmission.
I was thinking about doing that, but if I keep on getting good samples back then I might get to skip that step.
if the response says you have glycol in the oil and you have put 1000 miles on since you pulled the sample then its probably already too late
The local Caterpillar lab I use is in town and they have less than a 24hr turn around time. The kits I am using were 12 for $120. That included the postage, lab cost, and bottles. Six years of sampling for me.