Originally Posted by Tone357
I'm not so sure about that Army. I just sold my old GMC Sierra with 323,000 miles on the clock. I changed the rear end fluid once, and had the tranny rebuilt once during 20 years of ownership. I'm not saying I'll follow that schedule with the Ram though.
You got lucky, pure and simple. I know what I am talking about, and any mechanic will agree with my statements. All oil wears out. You would not run your engine 150k on the same oil would you? The stuff in your diff is the same, only thicker. Granted, there is no combustion going on in your diff, and there should be very little dirt, but thats why the oil lasts longer. It still needs to be changed. It breaks down over time due to heating/cooling cycles and friction.
I am not calling you ignorant by any means, but the assumption or thinking that any oil will last forever IS ingorant.
Even your lawnmower oil chould be changed once every other year or so. Do I do that? No, I think its a waste when a new mower is $100. I buy a new one about every 5 years anyway. But it still should
be done. New diff's arent $100. They are about 10x that amount.
If you dont have the lifetime warranty, and you dont change your fluids, you are playing russian roulette. If you do have the lifetime warranty (like I do) and you dont change your fluids you are too. Chrysler may not cover it, The manual outlines the BARE minimum.
I think I will stick to the cheap insurance method with my $20,000+ investment. Has not failed me yet. You guys go ahead and do what you do. I know one thing's for sure...judging by some of the responses to this same type of thread on this board, my next truck will be BRAND NEW, so I can make sure I dont get a truck that someone else put miles on and did not take proper care of it. The only way to (somewhat) safely buy a used car/truck, is to assume its never had ANY maintenance done. That means when you get it, changing at a minimum the oil and trans fluid. And if it has higher mileage like mine did when I bought it, even that is not a cure all. Have someone like me (a mechanic/tech, not just a 'friend who knows about cars') check it, and look for service records.
Oh, and for every case that anyone can make about how they know someone who went xxx,xxx miles and never had a problem (or they did themselves), I can make a case against it. Ultimately its personal choice. I have made mine.