Stephen Harding wrote:
Keith Willshaw wrote:
"M. H. Greaves" wrote:

Wasnt there only one kind of allison engine i.e. the inline engine, or are
you talking about the one in the C130 hercules?!

Allison was the name of an engine manufacturer that made a
wide range of engines. IRC its now a subsidiary of RollsRoyce

There is an Allison transmission division of GM that still makes
[very good I understand] truck transmissions.

Allison manufactures heavy-duty automatic transmissions (for lazy,
limpwristed city bus drivers). Rockwell dominates the market for long
haul, over-the-road truck transmissions that requires manual shifting.

Is this a different Allison than the WWII engine maker?

It's the same company. Allison (and Rockwell) are heavily involved
in the aviation industry.