Re: more packards

Posted by HH56 On 2008/12/28 18:15:24

To get a detailed ideas of changes, you almost need to sit down with parts book or service manual 56 supplement and compare. Externally they look the same except the 55 has cast iron case vs aluminum in 56. Internally many of the components same but others had rework for strength, deficiencies, usability, serviceability etc. The valve body was changed considerably resulting in a different shift pattern and response for 56.