Possible transmission Solenoid failure
My TX has only 2 solenoids, one for Overdrive one for the torque converter lock up. It is a chrysler A-500 from 1989, also called the 42-RH. Basically a 904 with a overdrive housing tacked onto it....
Forum Discussion
Allpar.com was one of the first, perhaps the first online forum I joined. Can't remember my username or password though. I think about 10 years back they kept having so many issues with the site I stopped visiting. DO not really remember why.
Was in some other Dodge related forums but all it took was one insufferable feminine hygene product and the bag it comes with to get me to remove those bookmarks.
The Solenoid wiring has 3 wires. I will assume one is a ground.
I am thinking about backprobing the connector at an easy to reach location with some T10 bulb receptacles, that way a steady light bulb will mean the ECM is sending a steady signal, and a flashing light means it is not, and I will not have to drive and hold voltmeter leads at the same time.
Replacing the solenoids means dropping the pan and valve body. Never dropped the valve body before, but I do not just want to throw parts at it and pray.
Later versions of my transmission have more solenoids and much of the info I find is for them in later model vehicles.
So where I am at, is thinking I need to determine if the solenoids are getting a solid or intermittent signal, and go from there.
From this forum i was hoping more to understand how solenoids fail, and their behavior when they reach the end of their useful life. I am not going on any roadtrips where overdrive and lockup are required, aI can simply lock it out of overdrive, so I do have some time to deal with this issue.
I do fear if it is mechanical in nature that I am grenading the transmission by continuing to drive it though.
Was in some other Dodge related forums but all it took was one insufferable feminine hygene product and the bag it comes with to get me to remove those bookmarks.
The Solenoid wiring has 3 wires. I will assume one is a ground.
I am thinking about backprobing the connector at an easy to reach location with some T10 bulb receptacles, that way a steady light bulb will mean the ECM is sending a steady signal, and a flashing light means it is not, and I will not have to drive and hold voltmeter leads at the same time.
Replacing the solenoids means dropping the pan and valve body. Never dropped the valve body before, but I do not just want to throw parts at it and pray.
Later versions of my transmission have more solenoids and much of the info I find is for them in later model vehicles.
So where I am at, is thinking I need to determine if the solenoids are getting a solid or intermittent signal, and go from there.
From this forum i was hoping more to understand how solenoids fail, and their behavior when they reach the end of their useful life. I am not going on any roadtrips where overdrive and lockup are required, aI can simply lock it out of overdrive, so I do have some time to deal with this issue.
I do fear if it is mechanical in nature that I am grenading the transmission by continuing to drive it though.
