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RE: O/D Installation

To: "Foster, Stan" <stan.foster@hp.com>
Subject: RE: O/D Installation
From: "Robert M. Lang" <lang@isis.mit.edu>
Date: Thu, 27 Oct 2005 17:12:12 -0400 (EDT)
Hi,

The "problem" of using a J type in 2nd gear as I understand it is related
to the fact that the J-type has no oil pressure accumulator and therefore
takes more time to build the pressure to engage the overdrive clutches
than it really should. I guess this would imperil (emperil?) the clutches
in the O/D unit. The reason that it takes time to build pressure is that
the pump gets its motivation from the output shaft of the tranny.

The A-type has an accumulator and therfore has residual pressure to engage
the clutches regardless of the speed of the output shaft.

Of course, I could be full of it. You never know.

Somehow, having been a "student of things Triumph" for a long time, I
think we can relate the demise of the A-type to cost reductions, but I'll
cede to anyone that knows better.

rml
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