Okay, so my wife comes to me last night and asks me if driving in D3 at 80 MPH would hurt anything After a few choice words I settle down and conclude that it probably would'nt hurt if it was'nt for too long. Then she says it was for about 25 minute ride to her moms. Then I get scared (and mad again) and walk out to take the van for a spin and it's drives fine, no crazy shifts or anything. I check the tranny fluid and it seems a little burnt but okay for the most part. So I tell her to take it first thing in the morning to get the tranny fluid changed at a local reputable (or so I thought they knew their shit) shop because I wanted it done ASAP. She calls me and tells me that they told her they could not change it because it was not time yet. So I get on the phone with the guy and explain to him the situation and explain to him that the owners manual states to change it at 30k and we have 29k on the van anyway so just to change it. he still would'nt change it asked that I take it to the dealer because he did'nt want to be responsible. I did'nt have time to argue so I hung up. Well, I get home and my wife tells me the CEL is on. So, I bust out my code reader and I'm getting a P0730 which according to what I found is an incorrect gear ratio code. So, I'm thinking that the code may have been there since my wife drove the van in D3, so I reset the ECU and now the code is gone. Should I worry? I'm just going to change the fluid myself this weekend just to be safe. Any tips on changing the tranny fluid? Thanks fellas.