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Topic: 1955 Ultramatic - fluid level

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ewrecks

1955 Ultramatic - fluid level

Home away from home

Gentlemen- Need help to settle an argument. To check the fluid level on the Ultramatic trans in the 55 Packard should the level be checked with the engine off or,warmed up with engine running and trans in neutral or park?
Old timer said off and cold.

Posted on: 2017/10/19 0:42

Let the ride decide

Re: 1955 Ultramatic - fluid level

Home away from home

The owners manual does not indicate,
https://www.packardinfo.com/xoops/html/downloads/55_PAT_OM.pdf

I have always done the engine running, transmission in neutral.

The service manual describes what to do,
https://www.packardinfo.com/xoops/html/downloads/servicemanual5556/Sect07_TwinUltra.pdf

Posted on: 2017/10/19 7:50

Owen_Dyneto

Re: 1955 Ultramatic - fluid level

Forum Ambassador

I think I'd be careful about accepting advice from your "old timer", cold and not running would be the absolutely worst set of conditions to check the fluid level for your Packard, and probably for any automatic transmission. Shop manual says warm engine at curb idle, selector in "N".

Posted on: 2017/10/19 7:51

HH56

Re: 1955 Ultramatic - fluid level

Forum Ambassador

With the dipstick in the engine compt, it is easy to check with engine running but since the 55 converter drain back characteristics are the same as earlier models, If for some reason you do want to have the engine off Packard said to make sure the level was checked within one minute after stopping the engine.

Posted on: 2017/10/19 8:36

Howard

Tommy Baccaro

Re: 1955 Ultramatic - fluid level

Just can't stay away

I was always told when I started tinkering with cars in my teens that you check with engine running in neutral or park. Warm but not necessarily hot.

Posted on: 2017/10/19 8:42

BigKev

Re: 1955 Ultramatic - fluid level

Webmaster

From the 55-56 Service Manual:

Attach file:

(26.84 KB)
1_59e935d5155d1.jpg 303X469 px

Posted on: 2017/10/19 18:31

-BigKev

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