Re: Transmission stuck
Posted by HH56 On 2023/8/3 9:56:08
Nothing electrical at all connected with the transmission itself except 2 switches mounted to the outside of the case on the passenger side IF you have the Electromatic Clutch. They are not part of the transmission and are just actuated when you shift into a gear.
In addition to checking for something that bumped the linkage, have you checked the condition of the two shift levers at the bottom of the steering column? That symptom is somewhat typical if the upper 2-3 lever has started binding to the shift tube because of no lubrication. The upper lever has no provision for any kind of lube and water condensing on the shift tube can run down and get behind the lever. That starts corrosion and rusting which can bind the lever to the shift tube. Both levers must be absolutely free to turn independently because if you select one lever for a specific gear and the other wants to turn at the same time it causes the interlock inside the transmission to go active. Depending on which lever moves its linkage first determines what the trans will do. Geometry of the levers and linkage somewhat favors the 2-3 lever wanting to shift the trans first which locks out R-1.
Another possibility is the interlock block in the trans has loosened which was an issue on the prewar trans. Another possibility is wear on one of the detent balls or plugs in the interlock has allowed the ball or plug and the spring behind it to slip out of position and bind. That has also happened to others on the forum.
At the least I would verify the condition of the levers. You can disconnect the rods at the lever and then reach down and turn them by hand. Just sitting, the lower lever should be very easy to turn. The upper lever will be connected to the operator lever and will want to move it when you try to turn the lever. Having a helper pull the operator lever back will select the lower R-1 lever and the upper 2-3 lever should be very easy to turn. If the levers check out OK you might also go to the service index on the left menu and select the prewar models to check out transmission, then look at the gear shift, linkage, and lockout articles. There are quite a few referring to adjustment and wear issues that can cause the symptoms you are experiencing.
Here is an illustration of the column with the arrow pointing the suspect lever worth checking for being free to turn.
Attach file:
lever.jpg (18.64 KB)
In addition to checking for something that bumped the linkage, have you checked the condition of the two shift levers at the bottom of the steering column? That symptom is somewhat typical if the upper 2-3 lever has started binding to the shift tube because of no lubrication. The upper lever has no provision for any kind of lube and water condensing on the shift tube can run down and get behind the lever. That starts corrosion and rusting which can bind the lever to the shift tube. Both levers must be absolutely free to turn independently because if you select one lever for a specific gear and the other wants to turn at the same time it causes the interlock inside the transmission to go active. Depending on which lever moves its linkage first determines what the trans will do. Geometry of the levers and linkage somewhat favors the 2-3 lever wanting to shift the trans first which locks out R-1.
Another possibility is the interlock block in the trans has loosened which was an issue on the prewar trans. Another possibility is wear on one of the detent balls or plugs in the interlock has allowed the ball or plug and the spring behind it to slip out of position and bind. That has also happened to others on the forum.
At the least I would verify the condition of the levers. You can disconnect the rods at the lever and then reach down and turn them by hand. Just sitting, the lower lever should be very easy to turn. The upper lever will be connected to the operator lever and will want to move it when you try to turn the lever. Having a helper pull the operator lever back will select the lower R-1 lever and the upper 2-3 lever should be very easy to turn. If the levers check out OK you might also go to the service index on the left menu and select the prewar models to check out transmission, then look at the gear shift, linkage, and lockout articles. There are quite a few referring to adjustment and wear issues that can cause the symptoms you are experiencing.
Here is an illustration of the column with the arrow pointing the suspect lever worth checking for being free to turn.
Attach file:
lever.jpg (18.64 KB)This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=259939