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[TR] A Type Overdrive

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Subject: [TR] A Type Overdrive
From: David Lylis <dlylis@gmail.com>
Date: Thu, 19 May 2011 15:27:20 -0400
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I have put an A Type Overdrive in my 69 TR6 and have a few questions.

If I disconnect and remove the solenoid and actuate the overdrive from the
passenger side lever the overdrive engages.
Now, this is what I did to test it out.  It is in the car with no tunnel and
no prop shaft.  I removed the operation valve took out the ball, spring,
etc., put the valve back in and then tested whether or not the cam on the
cross shaft was moving the valve properly.  It is.  With the passenger side
lever in full resting position to the left I move the lever to the right and
the valve immediately starts to rise.  Cool.  That is what it is supposed to
do.

I reseated the ball and reassembled the valve, started the motor in third
gear and I have to push the lever all the way to the right in order for the
overdrive to engage.  It does engage and disengage, and when I shut off the
motor I have to move the lever forward to relieve pressure.  All is OK
there.  The overdrive does not engage until  the lever is at the 12 o'clock
position over to about the 2 o'clock position, in spite of the fact that
when I tested it dry the valve moved up with the lever in the extreme left
position.  I am not sure I understand that.

Now, with the motor running and the transmission in third gear there is so
much pressure that the solenoid is not strong enough to pull up on the
drivers side lever to engage the overdrive.

Does anyone have insight into this?  I know how it works, and why it works,
but this malady makes no sense to me.

I do not have a pressure gauge (yet) and the unit is not rebuilt.

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I have put an A Type Overdrive in my 69 TR6 and have a few questions.<div><=
br></div><div>If I disconnect and remove the solenoid and actuate the overd=
rive from the passenger side lever the overdrive engages. =A0</div><div>Now=
, this is what I did to test it out. =A0It is in the car with no tunnel and=
 no prop shaft. =A0I removed the operation valve took out the ball, spring,=
 etc., put the valve back in and then tested whether or not the cam on the =
cross shaft was moving the valve properly. =A0It is. =A0With the passenger =
side lever in full resting position to the left I move the lever to the rig=
ht and the valve immediately starts to rise. =A0Cool. =A0That is what it is=
 supposed to do. =A0</div>
<div><br></div><div>I reseated the ball and reassembled the valve, started =
the motor in third gear and I have to push the lever all the way to the rig=
ht in order for the overdrive to engage. =A0It does engage and disengage, a=
nd when I shut off the motor I have to move the lever forward to relieve pr=
essure. =A0All is OK there. =A0The overdrive does not engage until =A0the l=
ever is at the 12 o&#39;clock position over to about the 2 o&#39;clock posi=
tion, in spite of the fact that when I tested it dry the valve moved up wit=
h the lever in the extreme left position. =A0I am not sure I understand tha=
t.</div>
<div><br></div><div>Now, with the motor running and the transmission in thi=
rd gear there is so much pressure that the solenoid is not strong enough to=
 pull up on the drivers side lever to engage the overdrive.</div><div><br>
</div><div>Does anyone have insight into this? =A0I know how it works, and =
why it works, but this malady makes no sense to me.</div><div><br></div><di=
v>I do not have a pressure gauge (yet) and the unit is not rebuilt.</div>

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