davidsonlaw - when you're wheeling always turn O/D off. Your transmission will lock up in 3rd and stay a lot cooler. If you are going to be running slow then keep it in 4 Low. If you get HOT OIL then pull over, put it in Neutral, and keep the engine running to push the oil through the stock cooler to help cool things down faster.
An extra oil cooler is certainly cheap, and does keep the transmission cooler, but could potentially be a problem with warranty work - especially if you have the lifetime powertrain warranty. I got mixed signals from my dealer - they were OK with my lift, tires, gears, etc., but iffy on the cooler.
Out here wheeling in the desert I haven’t gotten a HOT OIL indicator yet, but if I did I would do as Millermagic suggested and take it to the dealer and have them flush out the old oil and ask them if they have a real cure for the problem. Maybe they’ll install a free oil cooler and not mess with your warrantee.
2008 Rubicon - 2 Door - Flame Red - Automatic - MyGIG - Power Group - Deep Tint.
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