Hello Guys, Thanks for the response. I did wait awhile, un hooked trailer and was planning taking to auto Zone to read the codes. When I cranked it, there was no light, took to Auto Zone and said no codes?? So I drove today another 350 miles with no problems. Maybe it was heat, I was driving through Dallas on a Friday Afternoon about 3p.m. and that would make anybody hot!! Have 188,000 on 99 F250. Did replace transmission seal a month or so back and then changed fluid again. Seems to be O.K. When trying to get seal replaced everyone wanted to rebuild the transmission. Never have yet and still going. thanks for the responses. Sure good to have Ex Ford transmission guys respond. I really and truly appreciate your time. Wanting to repay the help. Thanks again. Dave