Re: Mobil Economy Run: Specific Packard results?

Posted by Dave Brownell On 2014/12/31 19:28:21

I think you're correct about Hydra-Matics not having an overdrive fourth gear. It just felt like one, compared to PowerGlide, Dynaflow and of course, our Ultramatic.

A neighbor had a 1955 Olds Super 88 that would knock your teeth out with brutal shifts. Something might have been out of adjustment because another neighbor's new 56 Cadillac was much smoother. All things considered, including the propensity to leak fluids, I don't know which transmission caused more comments, Ultramatic or Hydra-Matic. GM surely sold them in strange places, so that might be the answer.