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Re: Overdrives going backwards

To: "Nelson Riedel" <nriedel@nextek.net>
Subject: Re: Overdrives going backwards
From: David Massey <105671.471@compuserve.com>
Date: Thu, 2 Aug 2001 13:42:41 -0400
Cc: "David Massey" <105671.471@compuserve.com>, "Scott Tilton" <sdtilton@yahoo.com>, "[unknown]" <triumphs@autox.team.net>
Message text written by "Nelson  Riedel"
>A few facts:

The force holding the sliding clutch in the rear position is about half the
force holding it in the forward position.

The torque reqirements in OD are less than half that of direct drive
because OD
is not operation in1st.

>From this one can conclude that the designers were less concerned about
the
torque capablilies of the rear position of the sliding clutch.
<

Perhaps, but the real test is to assemble one without the sprag clutch and
see what happens.  Another thing to consider is that the sprag clutch is of
no use when reversing.  This and the fact that most gear boxes have roughly
equivelent ratios for first and reverse would suggest that it is possible
to overcome the cone clutch whilst reversing.  I have never experienced
this in either my TR3 (A-type) or my TR6 (J-type - which has only 4
"release" springs).  Nor have I heard of this happening from any of my
Healey driving acquaintences with their bigger, even more torquey motors.

Dave Massey

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