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Hello Packard friends
First post and question on the forum.
After coming across some posts in connection with trottle control linkage, kick-down, and DD engagement, out of curiosity I checked my spring loaded carb rod. In addition but maybe this is another topic, on my first drive of spring I have also noticed that compared to last year, DD engages later (medium throttle at around 40 mph, up a slight incline not even at 45 mph).
Well, I took the rod out, pulled hard, but spring is apparently completely frozen, doesn't move a bit. It seemed that the outer and inner cylinder of this mechanism were locked.
I submerged the part shown here in WD-40 rust remover for several days. Quite a bit of rust showed up coming out between the outer and inner cylinder.
About two days ago, I was able to move the outer cylinder, basically rotate it around the inner cylinder.
This released more small rust particles. The outer cylinder now moves pretty freely around the inner cylinder.
I also seem to feel the spring inside moving with the inner cylinder.

But this has not done anything to the spring mechanism itself. It is still completely locked; it does not move at all - no give - even when pulling really hard.
Below two pictures of the parts. The inner of the fat part doesn't move at all.

Any suggestion is welcome.
Thanks in advance.
Greetings from Switzerland
Bernhard

What about soaking it in a shallow pan of penetrating fluid for a day or two followed by using a spray can with a tube nozzle to blow some lubricant inside and force more rust out. That might free things up so the short rod will push in but then I would wonder if it was the spring that rusted and was now thin and about to fail. If it stays stuck, finding that piece over here should not be too hard but maybe an issue in Switzerland and then paying more in freight and duty tax than probably what the part alone would cost.

I believe there were different length assemblies depending on carb so you might measure the overall length of your spring and short rod portion shown in the second photo without the threaded section in the first photo attached. That spring part and short rod may be the same for all but a measurement of just the length of the short rod with bent end part of the spring housing would also be good to have to make sure. Post the measurements so those with parts cars could check and see if they might have something if you need to find one.

Here's a good forum post about your direct drive, throttle valve, linkage, etc.

Maybe your rod got painted, and is stuck because of that? Maybe soak it in some solvent for a while and then maybe something that eats rust to see if you can get it to free up.

Quote:

The document I wrote (#1051JC) is for Twin Ultramatic cars. Yours is just an Ultramatic. The linkage works the same way, but the transmission itself is different. You can just adjust the linkage to your liking; it won't be a problem as long as the clutch is not slipping when you go into direct or accelerate hard in direct. Going into direct late means your throttle pressure is a little too high. The throttle linkage is pulled towards the firewall for more throttle, so you need to move the transmission linkage a little bit forward, try 1/16", which will lower the throttle pressure and give you an earlier shift into direct.

Thanks for the quick recommendations and links.
I am going to work on this over the next few days with test runs - weather permitting - cold and rainy recently.
I already tried to locate this part in the US, but Kanter doesn't stock it anymore and website requests to Tucson Packard and Max Merritt remained unanswered.
Any other suggestions?

Additional information:
Measurements - length:
Longer rod with thread: 9 3/16 in
Shorter rod up to spring housing: 3 5/16 in

Is that the vertical piece between the accelerator pivot and cross shaft or the piece on the right side between the cross shaft and carb? I'd expect either way that piece would have been on many 53 Packards and probably 54s and not just a Caribbean.

If you post the length of the spring and rod portion and for good measure the overall assembled length with the threaded piece attached, if it is the accelerator side piece, I would expect almost all Ultramatic parts cars would have one but if it is the piece between carb and cross shaft perhaps some others with 53 or maybe even 54 parts cars having Carter 4 barrels could help.

Packards Southwest or Seattle Packards might also have something if you can provide the dimensions.

On my '53 Cavalier that linkage is 14 1/2" long the way I currently have it adjusted. That's 37 cm for you Bernhard! I'm Canadian and speak both inches and centimeters!

I would guess the linkage is the same as yours.