I was scared to death buying a Dodge auto but have squeezed 50K out of this one so far. I'm stock but do tow ~9K through the hills quite often. At 35K mile I changed the filter/fluid with Mopar ATF +4. I really wanted to do it sooner. I put a trans temp gauge on it at the same time. I was surprised at how cool it runs even in 105* heat while towing. From what I have read, there have been vast improvments on these 48re's. As soon as I can afford to, I'll be modding this trans as they can never be strong enough.