Vintage Oldsmobiles Curved Dash, Limited Touring, Models 40, 53, 66; Series 60, 70, 90

Won't kickdown

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Old May 11th, 2010, 03:44 PM
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Won't kickdown

I've adjusted all the linkage as per the manual and the car seems to be shifting well now. But it just won't kick down!
I think I may be missing a spring on the linkage at the carb. Anyone have a picture of a stock setup. I definitely have a hole on top of the throttle linkage that looks like it would hold a spring....possibly for the kickdown?
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Old May 11th, 2010, 06:09 PM
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What trans?
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Old May 11th, 2010, 09:11 PM
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sorry , I was posting that at work and someone stopped in and interrupted me!

It's a 1956 Jetaway...Also known as the dual coupling hydramatic.
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Old May 12th, 2010, 06:49 AM
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I have a stock 57 Jet away linkage(in use) are they the same as a 56 ???
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Old May 12th, 2010, 06:55 AM
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Those manual throttle valves are hard to set correctly. Hopefully someone can post some pics which will help you out. Good luck.
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Old May 17th, 2010, 02:49 PM
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Hi Fletch.
I wouldn't know if a 57 is the same or not. Do you happen to have a pic of your carb linkage?
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Old May 17th, 2010, 06:41 PM
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yes I can email/post picture sometime this week,
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Old May 19th, 2010, 09:31 PM
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here's a picture of my linkage. I drew an arrow to wher I think I'm missing a spring
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Old May 20th, 2010, 06:15 AM
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Thanks.. I will look tonight and email you as to the linkage I have on the 57.. cloudy here, thus bad lighting for my phone camera..
Regards,
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Old May 20th, 2010, 10:44 AM
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Check page 3-84 in your manual, the image at the bottom right.

Norm
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Old May 20th, 2010, 12:49 PM
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That picture doesn't show where it hooks to on the bottom. I do believe that spring is part of the problem considering it's on the downshift lever!
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Old May 20th, 2010, 05:18 PM
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The hole you referance is un used... The only spring is the one connected to the firewall assmbly. About 2 inches long and 1 1/2 in diameter.
I believe the book will referance the screw/bolt nut which pushes down on the assembly. Adjustment at the trans and pedal are critical. I made a cardboard measure tool to get the proper spacing for the pressure lever. The book (3-81, 57 shop manual) has to be follwed closely.
It has taken several weeks to get it right .
Fletch
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Old May 21st, 2010, 09:43 PM
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Originally Posted by jaymann
That picture doesn't show where it hooks to on the bottom ........
It's been a while, but it seems like it was self explanatory. With the carb closed, it should go straight down less that 2". Do you have the correct spring?

Originally Posted by jaymann
........ I do believe that spring is part of the problem ........
It is.


Originally Posted by Fletch
The hole you reference is un used ........
Pages 3-79 (top) and 3-89 (bottom right) in your '57 manual.

Originally Posted by Fletch
........ The book (3-81, 57 shop manual) has to be followed closely ........
There are some small differences between your '57 and his '56 manuals.

Originally Posted by Fletch
........ It has taken several weeks to get it right.
Shouldn't take more than a few minutes.

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Old May 22nd, 2010, 09:47 AM
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Originally Posted by 88 coupe
It's been a while, but it seems like it was self explanatory. With the carb closed, it should go straight down less that 2". Do you have the correct spring?

Shouldn't take more than a few minutes.

Norm
The biggest problem with setting this up is 54 years of people messing with it. If this car was as it left the factory, It would probably take a few minutes.
I don't have the spring. If I did, I probably would have figured out were it goes.

The linkage is a mess too. Something's not right because when I followed the steps in the manual, I got to the step about adjusting the shift linkage and could not adjust it to within spec. I had the rods shortened as far as they would go and still couldn't get it into spec.
I'm not sure if they're bent or have been swapped for the wrong pieces somewhere along the way.
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Old May 27th, 2010, 02:32 PM
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Jaymann: Owe you more info.... The spring(which prevented proper upshift into 3rd) was also missing from the bell crank, and had not been on the 98 for some time. Spring clip attaches to the hole on bell crank and keeps an upward pull on the trans pressure rod so to be insink with carb linkage..
Summary... 2 springs, one on firewall and one on the bell crank.
Fletch.
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