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Again I'm looking for help. For the first time since I've owned my 56 Caribbean h/t I don't have a stain under the car from leaking transmission fluid. I drove the car into my garage, working fine except for the leak. I had always thought the pan gasket was the problem, tried replacing it with no success. Finally noticed it was the shift rod seal causing the problem, running down and following around the pan gasket. Drained the trans and lowered it, removed the pan and the electric shift unit, removed the shift shaft, replaced the seal and put everything back together. No leak. However, now the car will not come out of low gear in either drive or high. First thought it was a problem with the electric unit not properly adjusted, but after a week of trying to adjust it with no results, I'm at a loss to figure what happened. Quite often over the years it would not shift out of low with the drive button pushed, but would never do this with the high button pushed. Don't understand why this would happen when it was ok when I drove it in. Is there anything that I could have put together wrong on reinstalling the shaft? I also notice that with key on and any button pushed on the unit that I can loosen the electric units 2 securing bolts, and I can move the unit up or down quite a bit. Is this normal, or could the unit itself have something worn inside to cause this problem? The manual says this could be caused by sticking governor valves, or sticking low-high shift valves. Any cure for this if it is my problem without tearing things apart? I am a dummy when it comes to automatic transmissions, and have no way of checking pressures. Also, I live in an area with no trans shops, and no one who has ever heard of an ultramatic transmission. The first question is always "who built this, is it a Ford transmission?" Any help or ideas to try would be appreciated. Thanks, Clifford

I can't help with the problem but to answer your last question, Packard itself built the Ultramatic.

My first thought.

The motor is out of adjustment.

The video below explains the problem I'm almost certain you are having. Drop the pan and tighten that setscrew then the jam nut. Then loosen your shift motor linkage, command the motor to Neutral (hit the N button), then manually set the transmission to Netural by rotating the selector shaft. Tighten the motor linkage then check for proper operation.

If you rotate the selector shaft so that the shifter arm is all the way towards the inside of the body, that's Park. Just rotate it over center all you can before the first "click", that is Neutral.

There is a slight chance that the shifter arm will be stripped out or whatnot. Replacements are easily available.

If that solves your problem, then the fix is to drill thru the shifter arm and install a roll pin so that it doesn't wiggle around any more.

Also, check that the holes in your pan are not distorted from overtorqueing. They are easily hammered back flat. See this post.

The drawings below show the shifter arm as it is located on the selector shaft.

https://www.youtube.com/shorts/8VWbsWP6gmA

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Here is a clear photo of the lever to go along with HPH's video.

Let me add something that I should have included in my original post. I had a problem years ago where the trans wouldn't go into reverse. I removed the pan and found the set screw that locks the arm to the shaft was stripped. I drilled it and installed a small bolt, lock washer & nut, and cured the problem. I've had this car for over 40 years, and that was the only trans issue I ever had, other than it would sometimes not come out of low when the drive button was pushed, but always shifted fine when I would use the high button. I will try manually setting the shaft to neutral and setting the unit to neutral by pushing the neutral button and see what that does. My comment in my original post on who built the trans was referring to the question shop owners ask. I know the Ultramatic was Packard designed and built. I will repost once I try this manual setting to see if that cures my problem. The play I was referring to is not in the shaft, but rather in the electric shifter unit. I can move the unit each direction before the shaft starts to move. Thanks.

Quote:

To confirm the operation you were experiencing:
1. With the Drive button pushed, the transmission stayed in low gear.
2. With the High button pushed, the transmission would start in low gear and then shift to high hear.
3. You are describing actual gear changes and not the engagement of Direct Drive.

Pressing the High button gives you ONLY High gear.
Pressing the Drive button gives you Low gear and then shifts to High gear.
Pressing the Low button gives you ONLY Low gear.

The gear positions in order are PNHDLR.
Your description indicates you are getting the function of Low when the Drive button is pushed and the function of Drive when the High button is pushed.
If this is the case, the motor unit is out of alignment. If it is occasional, the alignment is loose.
Does the problem occur when shifting in both directions, from Park to Drive and from Reverse to Drive, or only one?

This can be tested without opening the transmission.
If you loosen the motor unit, you can test the manual valve shaft for looseness.

We should get MrPushbutton's input on this one too.

Try checking the operation of the shifter. I would hit reverse first, then go L D H N to check that it moves one "click" at a time. Confirm visually. If it DOES go into drive as expected, then your problem is elsewhere.

- Check that the flyweight on the low speed governor has not detached. Note: the high speed has no visible flyweight.

- Your throttle pressure adjustment could be set very high. If so, your direct drive would also engage only at very high speeds like 70 MPH.

- A sticking low-high shift valve is possible but unlikely unless there is debris in your transmission or it was reassembled sloppily.