Several have succeeded with no trouble at all. Install a bigger cooler than you need and a thermostat to control oil temp and take the guessing out of it.MAS - fully agree! I agree that the Ram cooling capacity is just not there - that's the primary reason I sold my truck after 60,000 trouble-free miles. We were starting to tow more in hotter weather and trying to manage oil temps with heavier loads was weighing too much on me.
Rather than sell the ED, I briefly considered trying to "fix" the ED situation. We have a lot of experience in racing and we we have designed and sold oil cooling solutions for high performance cars. In trying to HELP the op, I only offer that the fix is not so easy. Assuming OEM cooler is good for 60K BTU/hr (and it may need 100K or more), engineering a cooler and placement to achieve that is very, very hard. Frankly, it was a great business case for us to look at... we know first-hand the need, we know how to connect with owners (the forum!), so all we had to do is to develop a solution. It is our opinion that a solution is exceptionally hard. It is simply not as easy as buying a bypass and using an aftermarket oil to air cooler. 90% of the time this approach will end up with LESS capacity than the stock set-up. This is the caution I have been trying to convey to the OP.