I know that it is a different trans, but on my '90 bronco with an E4OD I had a shifting problem due to a faulty VSS. The PCM uses the VSS to help to determine shift points. My problem was not temp related, and was in the opposite direction, it upshifted a little too soon, and I had to jump on it to get it to downshift out of OD.
I know that there is such a componenet called the turbine speed shaft sensor. I don't know what it does, but it sounds important, and electrical components have more resistance as they heat up.
I know that there is such a componenet called the turbine speed shaft sensor. I don't know what it does, but it sounds important, and electrical components have more resistance as they heat up.