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get a bigger one.....I've got the Ultra Cool, and I'm not sure what the rating is......but I believe it's like 60,000? Get the biggest one you can! They aren't much more expensive, and it's money well spent
Tru-Cool is definitely the most popular, but the results are the same......they are both effective. The Ultra Cool has pretty much the exact same specs and it's about $80 cheaper
Thanks for all the replays, I actual already have a BD Cooler mounted under the truck on the right side. My trans temp run 160F to 185F on a 85F day. Pulling my 5th wheel it will run average 185F on the freeway but when pulling at slow speeds up the dirt mtn roads it will get up to 200F to 250F. It really scares me when it gets in the higher temps. I think I will move the BD Cooler behind the grill to get more air flow through it.