Re: 1940 overdrive?

Posted by BDeB On 2014/3/21 1:10:20
Quote:

Jack Vines wrote:
Nomenclature question:

The 1951-64 Studebaker V8 has a Borg-Warner T86 transmission and an R10 overdrive attached

The 1955-56 Borg-Warner V8 transmission is a T85 and the overdrive unit is an R11.

However, it seems some knowledgeable Packard folk refer to the transmission with or without overdrive as an R9 or R11. What's correct nomenclature for a standard transmission with and without overdrive?

jack vines


Packard made their own 3 speed transmission up until 1954 and the basic design evolved from the 1935 One Twenty. There was no special designation for the 3 speed without overdrive.

The R9 or R11 designation really only applies to the Borg-Warner overdrive unit that was assembled to the back of the 3 speed with an intermediate adapter.

Many people may refer to the complete assembly with overdrive as an R9 or R11 but would not use the same description for the regular 3 speed unit.

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