I've got an 08 Grand Caravan 3.3 with the 4 speed in it. It's been pretty bullet proof so far. Here's my conundrum... It's got 200K on it. The transmission fluid has been replaced twice in it. At like 50, and 90K, but not since. Both times at the dealer. Both times with ATF+4. Fluid doesn't smell burnt. It's the appropriate color. I debate whether to change the fluid as I'm sure there is probably some friction material floating in it. Wondering if anyone has sent fluid out for analysis to see what is in it... i.e. friction material, metal, what it's slip modifier properties are vs new... IF I had a sense that it doesn't have a lot of contamination in it, I'd probably take a chance on having it replaced again. It's been a good car and I'd like to keep it that way. It will likely soon be taken out of the high mileage club as my 17yo will be driving it instead of my wife.