After getting various advice from various sources, my conclusion is not to tow in OD, and to use Drive unless actually on the highway. So I started using Drive instead of OD for everyday around town driving. I now notice that the downshift into 1st is very harsh compared to the downshift in OD. Is there a problem or is this normal ??? If this is normal why the difference. I hope I am doing the right thing by using Drive instead of OD.