Re: Need info on 55 Clipper

Posted by BH On 2006/12/28 0:13:21

Welcome, John -

I think you'll find this Forum to your liking as well, but keep in mind that we're just getting started here. Several users from the Packard Club and AACA Packard Forums have chimed-in and I expect more to come.

The Twin Ultramatic is considered a problem by some only because it is so much different than other automatics. A good place to start is with a download of the three-volume set on Ultramatics - and be sure to follow the bulletins for adjustments.

You should also take a look at updates and services that Peter Fitch has to offer at:

http://www.ultramaticdynamics.com/

Any weakness in clutch packs have been addressed by the use of more modern material than what was available 50 years ago. BTW, a fellow in Kansas recently resurrected a '56 Patrician from a field that had been fitted years ago with a '55 Twin Ultra, and with nothing more than a fluid change or two, it is a reliable daily driver.

The Twin and Gear Start versions of the Ultramatic only had two-speed forward speeds, but with automatic upshift from Low to High gear. The torque characteristics of the Packard V8 and torque multiplication of the converter are so good that you can actually start out in High gear - unless you are on a hill (which would benefit from use of Low gear).

The torque converters in all Ultramtics also feature a Direct Drive clutch; the Big Three wouldn't have a lock-up converter until a couple of decades later. The novice misinterprets the engagement of that clutch as a shift into third gear, when there is no such thing - not needed.

Thanks for the pic of your car (looks pretty solid), but I can't tell whether it's a Super Panama or Custom Constellation from this angle. Your '55 Clipper has a 352-cid motor, but you need to know the first four digits of serial number to find out more.

Detailed specifications on your car can be found in the shop manual, which is now available for download, but I am working on some specs and general model info on the '55 and '56 cars for display at this site in the very near future.

You should join the Packard V8 Club, too (also FREE):

http://www.1956packardpanther.com/PV8C_Index.html

They have some interesting info on performance, but available to registered members only.

Hope this helps. Come back with more specific questions as they crop up, and someone here will have an asnwer, but be patient for the reply.