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Re: Neutral Safety Switch
Home away from home
Home away from home

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the 1956 Studebaker shop manual covers the switch removal installation and setting The section covering the Flightomatic transmission page 49 manual is in Packard info

Posted on: 2022/11/11 15:50
C:\Users\veron\Desktop\New folder\1956 Packard Caribbean\753.jpg
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Re: Neutral Safety Switch
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humanpotatohybrid wrote:
Same problem on my 400, it will turn over only in Park, not Neutral.

I just ignore the problem, to be honest.

The Stude manual has a decent description and Packard & Stude were trying to combine some components to cut down on inventory. The short or half length steering column used in 56 Packards is an example that might have been one of the successes. It is very similar if not identical to what is shown in the 56 Stude service manual.

No idea if Stude managed to use the same switch and mechanical engagement as in the 55-6 Packard but the Packard version has a limited adjustment and is somewhat sensitive to linkage wear. Since the switch also controls the reverse lights that switch portion is activated at the opposite end of the lever movement so the adjustment with P & N spot is a compromise and critical. It could be the adjustment is right at the edge or it could be the linkage is worn and with detents actually being in the trans, there is enough slop in the linkage that when it detents at neutral the switch is past the active contact area.

Posted on: 2022/11/11 16:14
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Re: Neutral Safety Switch
Just popping in
Just popping in

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Gar wrote:
I have a 57 that will not start in neutral. I checked my wired connection and they appear to be OK. Is there anything that I should look at before I keep trying to find a new switch?

I have been looking for the switch 534390 for about a month now...
(57 with auto, ps, pb)


There should only be 1 bushing on the Selector Shaft Arm on the transmission.

Under the Battery Box, where the switch mounts on the steering column, there is a 5/16 headed bolt on each side of the Switch, the switch is slotted where the bolts go through, allowing for SOME adjustment. I have mine set about in the middle with a New Rubber Bushing on the Selector Shaft on the Transmission.

The hole in the shifter arm comming off the steering column does not take a bushing, and can get really sloppy, but unless someone has tampered with the shift rod, you really shouldn't need to adjust much, try the selector shaft bushing 1st.

Posted on: 2023/1/20 5:41
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