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Old 12-17-2021, 05:46 PM
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washtubman washtubman is offline
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Default 57 Hydramatic Shifting

My Star Chief shifts into 4th gear about 20-25 MPH. Is this normal? If not, how can I make the shifts at greater MPH, other than using the shift lever to manually shift? Thanks for the replies.

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Old 12-18-2021, 02:55 AM
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Jack Gifford Jack Gifford is offline
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At light throttle that's a normal 3-4 shift.

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Old 12-18-2021, 09:01 AM
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Normal shift speeds are given in the 57 Hydra-Matic Shop Manual (LINK), Section 13, page 111.

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Old 12-18-2021, 05:08 PM
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Thanks, that makes me feel better. Guess I just need to put my foot into it a little more!

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Old 12-18-2021, 05:09 PM
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Quote:
Originally Posted by Safari Larry View Post
Normal shift speeds are given in the 57 Hydra-Matic Shop Manual (LINK), Section 13, page 111.
Thanks for the reference; guess I overlooked that!

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Old 12-18-2021, 05:35 PM
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Adjusting your linkage (kickdown) will help longer runout.
Hope this helps.

GT

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Old 12-20-2021, 08:35 PM
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They should shift at around 8, 15 & 22 MPH on a light acceleration.

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Old 12-20-2021, 09:56 PM
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Quote:
Originally Posted by blueghoast View Post
Adjusting your linkage (kickdown) will help longer runout.
Hope this helps.

GT
Is that the rod from the carb?

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Old 12-21-2021, 08:42 PM
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Quote:
Originally Posted by washtubman View Post
Is that the rod from the carb?
Yes. Shorten it about 1/16" of an inch and try it.

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Old 05-11-2022, 09:53 AM
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Quote:
Originally Posted by Safari Larry View Post
Normal shift speeds are given in the 57 Hydra-Matic Shop Manual (LINK), Section 13, page 111.
Just have to give you a shout out, Larry, for hosting the trove of technical information on your web site for our old sleds. I will need to do something with my '57 Hydramatic to keep it on the road, and the tech manual online is great, and the digital indexing is incredibly helpful.

Thanks.

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Old 05-11-2022, 10:53 AM
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Quote:
Originally Posted by mr67gp View Post
Just have to give you a shout out, Larry, for hosting the trove of technical information on your web site for our old sleds. I will need to do something with my '57 Hydramatic to keep it on the road, and the tech manual online is great, and the digital indexing is incredibly helpful.

Thanks.
Thanks, such appreciation makes it all worth while. It was a 10+ year effort to get everything that is on the site now. I very much appreciate the help, articles and information I got from others on this forum. I use the site often myself. Bill Hanlon was one of the early contributors , he reviewed the Master Parts Catalog before I put it online and has articles on the site.

In retrospect, I probably should have named it differently, pontiacsafari.com makes people think it is about safaris but it is about all 1955-57 Pontiacs and some later years.

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