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In this Discussion
Hydromatic Differences Jet vs. Stepdown
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Is the Jet Hydromatic transmission different from the Hydromatic that was installed in the stepdowns? I assume it is, but thought I'd ask someone who knows for sure. Thanks for the help. Doug
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hudsonguy wrote:Is the Jet Hydromatic transmission different from the Hydromatic that was installed in the stepdowns? I assume it is, but thought I'd ask someone who knows for sure. Thanks for the help. Doug
I'm sure it is different. Model # used on the Jet was J-52, and the models used on the bigger Hudson engines were designated H-50, H-51, H-52, etc. The Jet 202 engine was a bit short on the torque of the larger Hudson engines, and probably would not have performed properly with the same Hydro unit. It did, however, perform very well with the J-52 Hydro. The 202 engine handled the Hydro much better than the '55 Rambler engine did.
Jerry
53jetmanJerry
email: HudsonJetman@mail.com
2nd Generation Hud-Nut
HET Tech Adviser on Hudson Jets 1953 & 1954
HET Registrar of all Hudson Jets -
Jerry,
I kind of figured as much.
Thanks,
Doug -
haven't looked into it,but generally,smaller cars with less torque would have fewer clutch plates inside,also the torus coupling would be smaller diameter,and the valve body would probably shift at a different rate.
I know this is how they were built for Rambler,Nash etc. so I assume the same for Jet.
I can check part numbers if needed. -
yorgatron wrote:haven't looked into it,but generally,smaller cars with less torque would have fewer clutch plates inside,also the torus coupling would be smaller diameter,and the valve body would probably shift at a different rate.
I know this is how they were built for Rambler,Nash etc. so I assume the same for Jet.
I can check part numbers if needed.
Although I've never had one apart, I've heard this to be correct. -
It has one less clutch in both the front and rear drum. I believe that the difference was in the thickness of the clutch piston. Torus coupling is smaller, some used a large O- ring instead of a gasket. Lou Cote


