Auto Trans Gear Selector Adjustment

General topics, not covered elsewhere, of all things Packard.
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Kenbwisc
Posts: 17
Joined: Tue Nov 23, 2021 6:05 am

Auto Trans Gear Selector Adjustment

Post by Kenbwisc » Sat Dec 04, 2021 1:57 pm

I had the dash out and after reinstalling the gear indicator is too far to the left. How do I make the adjustment?

Kenbwisc
Posts: 17
Joined: Tue Nov 23, 2021 6:05 am

Re: Auto Trans Gear Selector Adjustment

Post by Kenbwisc » Sat Dec 04, 2021 2:26 pm

Correction! The indicator needs to be moved to the left.

Howard56
Posts: 1372
Joined: Mon Dec 24, 2012 11:35 am

Re: Auto Trans Gear Selector Adjustment

Post by Howard56 » Sat Dec 04, 2021 6:33 pm

If we are speaking of the same 55 with the window issue, depending on early or late production there could be two different clamps holding the indicator rod. As long as nothing is bent, worn or loose leading to a lot of slop either in the detent assy inside the transmission or between the tongue on the indicator clamp mechanism and the slot in the shift tube the tongue mates into you should be able to loosen either a regular slotted screw in the early design or two setscrews in the later design and rotate the rod in the clamp so it points to the correct gear. Note that you may need to adjust in neutral then again in reverse and split the difference for the closest indication.

Also be aware that an issue with the Twin Ultramatic is a setscrew inside the transmission case can loosen. The setscrew holds a lever that moves the manual valve in the valve body which provides the detents you feel to the rod the gear shift linkage operates on the outside. If that screw loosens the general symptom is you can move the gear shift lever up and down a distance before you feel or hear the click in the transmission as the valve moves. Another less likely but still possible issue is wear in the linkage rods or loose bolts or deteriorated rubber at the bellcrank mounting to the frame or transmission side. If you have either issue it can also throw the indicator off and needs to be corrected because it will only get worse to the point a screw or bolt might fall out and there will be no shifting of gears at all.

This is the second design clamp that works the indicator rod. It is located under the rubber cover on the bottom of the steering column where it passes thru the slot in the housing holding the ventilation levers.
Attachments
indicator rod clamp.jpg
second design clamp.jpg

Kenbwisc
Posts: 17
Joined: Tue Nov 23, 2021 6:05 am

Re: Auto Trans Gear Selector Adjustment

Post by Kenbwisc » Sun Dec 05, 2021 11:57 am

It is on a 56 so I’m think the second photo applies.?

Howard56
Posts: 1372
Joined: Mon Dec 24, 2012 11:35 am

Re: Auto Trans Gear Selector Adjustment

Post by Howard56 » Sun Dec 05, 2021 1:27 pm

Yes it should be the second photo. Actually both show the same piece only the first photo has the piece mounted to the steering column. The early version clamp had regular screws instead of setscrews and a slightly different connection to the rod. Also note that any potential linkage wear or loose detent issues are also applicable on a 56. Not applicable to your conventional lever car but just FYI for anyone else, the loose setscrew detent issue inside the trans case is particularly serious if the car has the 56 electric shift system.

Park position has a different arrangement and is sort of by itself so does not share any of the detents you can feel as you change gears. It should not be used as an adjustment point for the indicator rod and will read more at just where it ends up. Before doing any adjustments to the indicator rod make sure you can feel a positive snap in at the normal gear positions. If you can feel each one and there is no appreciable up or down slop in the operator lever end as you change positions then select N and adjust the pointer. After that adjustment select R and if needed touch up the adjustment. Go back to N and split the difference if needed so both indicators are about the same amount off. If the shift lever feels spongy and you can put the trans in a gear but move the end of the operator lever up and down more than maybe 1/4 to 1/2 inch then take care of any linkage or detent issues first before trying the indicator adjustment.

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