Daveinet wrote:
The 4L85E just has 5 planetary gears instead of 3 on the output shaft. So you yes, if you have one rebuilt, you can easily install the different planetary. Technically you can buy 7 gear sets if you want to go crazy.
I think I might be tempted to try to reset the ECM. You can also go to a AutoZone and use their code reader for free. It would allow you to read any codes that are set, as well as reset the ECM (which is more than just reseting codes).
I'll try disconnecting the battery for a bit today and then pull into an auto zone first chance, that I go by one where I can fit, or just buy one. What is the approx. cost and since, I'm old tech, where is the outlet for this thing? I'm thinking on the left side of the steering column and what might it look like?