Originally Posted by BDW
What if the solenoid is good, what else could go bad?

What does the OD solenoid activate, is there a clutch pack or something, what changes the ratio?
I think the OD circuit was miswired so the OD was hardwired to ground.

Would it be possible to hear the solenoids activate through the pan, before it’s removed?

Appreciate the replies

The solinoid activates the valve with the big spring and piston in valve body, have to look at a diagram on internet. Once activated the overdrive clutch pac engages. That’s in the tail housing. If that’s gone major linning pieces in the pan