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
King of the Slackers has put off lubing the speedo cable, so far.
I found my username and password for Allpar forum and the responses to my issues brought up the possibility that the OD and lockup solenoids, which are on a plate held on with 3 bolts, could have had the 3 bolts loosen up, as others have reported this happening on this specific transmission and the leakage around the solenoids when the ATF is warm, would cause the dropping out of OD.
The general consensus is that this is more likely than a fault in the wiring from ECM to solenoids, which means I will likely drain my pan then drop it and see if the bolts are indeed loose.
But if I am going this far Perhaps I should just order new solenoids for ~50$ and drop the vlavebody and replace them while the pan is down.
Part of me also wants to simply rig up 3 T10 light fixtures and put LEDs into them. One bulb would indicate whether the 12v feed is intermittent, the other two wires are switched grounds for the OD and L/U solenoids. If the bulbs start flashing then I could perhaps avoid an unnecessary pan drop.
It also seems that once the ATF is warm enough that the OD is not engaging under 40MPH, that lockup will not occur under 55mph, where it always would occur at 47mph if accellerating slowly.
Perhaps L/U does not occur over 55mph once warm either. traffic impeded this portion of the test yesterday.
Heres hoping for a nice clean pan when I do drop it. I'd love to find loose bolts.
Replacing the solenoids requires dropping the valve body to remove and replace the electrical connector.
I found my username and password for Allpar forum and the responses to my issues brought up the possibility that the OD and lockup solenoids, which are on a plate held on with 3 bolts, could have had the 3 bolts loosen up, as others have reported this happening on this specific transmission and the leakage around the solenoids when the ATF is warm, would cause the dropping out of OD.
The general consensus is that this is more likely than a fault in the wiring from ECM to solenoids, which means I will likely drain my pan then drop it and see if the bolts are indeed loose.
But if I am going this far Perhaps I should just order new solenoids for ~50$ and drop the vlavebody and replace them while the pan is down.
Part of me also wants to simply rig up 3 T10 light fixtures and put LEDs into them. One bulb would indicate whether the 12v feed is intermittent, the other two wires are switched grounds for the OD and L/U solenoids. If the bulbs start flashing then I could perhaps avoid an unnecessary pan drop.
It also seems that once the ATF is warm enough that the OD is not engaging under 40MPH, that lockup will not occur under 55mph, where it always would occur at 47mph if accellerating slowly.
Perhaps L/U does not occur over 55mph once warm either. traffic impeded this portion of the test yesterday.
Heres hoping for a nice clean pan when I do drop it. I'd love to find loose bolts.
Replacing the solenoids requires dropping the valve body to remove and replace the electrical connector.
