Packard Forum Index » V-8 (1955-56)

I think for most of the auto industry the limited slip differentials were just starting to become a simple and common enough item for mass production in the mid 50s. With the V8s Packard was trying to do anything they could to prove they were at the forefront of modern technology so they adopted it. Going to Dana instead of continuing to build their own axles was also a way to consolidate suppliers since Stude had been using Dana for several years.

The version Packard used for Twin Traction was different in operation using a cone clutch type arrangement rather than the later units with individual clutch discs. It could have been one of the first that Dana made. If you have not already looked it over there is a 56 Service Counselor articlehttps://www.packardinfo.com/xoops/html/downloads/SC/SC-VOL30NO4.pdf that describes the operation. With the perceived slipping or lack of feeling that it is operating it could be the clutch facings are fairly worn by now.