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1955 twin ultramafic transmission
#1
Just popping in
Just popping in

GnadigeFrau
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Transmission works as it should when put in gear, but does not automatically shift when put in "D" low gear to high gear. The torque converter no longer automatically engages.

Posted on: 11/1 4:54
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Re: 1955 twin ultramafic transmission
#2
Home away from home
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humanpotatohybrid
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Probably the low speed governor flyweight has detached. You should drop the pan and confirm it's still attached.

I'll get a photo in a few minutes.

Posted on: 11/1 5:05
1955 400 | Registry | Project Blog
1955 Clipper Deluxe | Registry | Project Blog
1955 Clipper Super Panama | Registry
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Re: 1955 twin ultramafic transmission
#3
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humanpotatohybrid
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The low speed governor flyweight is crimped onto the governor valve as shown by the arrow. If yours has detached, hopefully it will be undamaged in the bottom of the pan. A welding shop can tack weld it back on, then you should take a file and file down the excess weld.

The unit above is the high range governor which you can leave in place.

You can remove the low range governor by having the transmission in Neutral then spinning the rear wheels to get the governor pointing down. Then remove it with a T handle. This is also shown in the manual.

Attach file:



jpg  Screenshot_20241101-071512_Gallery.jpg (1,561.91 KB)
225076_6724b910eda5a.jpg 1440X3040 px

Posted on: 11/1 6:18
1955 400 | Registry | Project Blog
1955 Clipper Deluxe | Registry | Project Blog
1955 Clipper Super Panama | Registry
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Re: 1955 twin ultramafic transmission
#4
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humanpotatohybrid
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Also, to be clear, I suspect you are also not feeling the converter lock up? If you do, then your linkage is just too loose causing you to skip Drive when you actuate the shifter.

Posted on: 11/1 9:09
1955 400 | Registry | Project Blog
1955 Clipper Deluxe | Registry | Project Blog
1955 Clipper Super Panama | Registry
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Re: 1955 twin ultramafic transmission
#5
Forum Ambassador
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Ozstatman
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G'day GnadigeFrau,
Forum member since 2022, but your first post, so to PackardInfo.

I invite you to include your '55 Packard in PackardInfo's Packard Vehicle Registry.

Posted on: 11/1 14:26
Mal
/o[]o\
====

Bowral, Southern Highlands of NSW, Australia
"Out of chaos comes order" - Nietzsche.

1938 Eight Touring Sedan - SOLD

1941 One-Twenty Club Coupe - SOLD

1948 Super Eight Limo, chassis RHD - SOLD

1950 Eight Touring Sedan - SOLD

What's this?
Put your Packard in the Packard Vehicle Registry!
Here's how!
Any questions - PM or email me at ozstatman@gmail.com
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Re: 1955 twin ultramafic transmission
#6
Home away from home
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56Clippers
See User information
Quote:

GnadigeFrau wrote:
Transmission works as it should when put in gear, but does not automatically shift when put in "D" low gear to high gear. The torque converter no longer automatically engages.


Just for clarification, when you say put in "D" do you mean the dart to the left of the "D" or the dart to the right? See the images below.


Click to see original Image in a new window


Click to see original Image in a new window

Posted on: 11/1 14:56
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