[6pack] J-Type OD - Engaged Pressure

[Navarrette, Vance]

 	Mike:

	More likely your gauge is reading low from the sounds of it. Have you cross
checked your gauge with a known accurate one to verify the readings?
	Also, tap the gauge lightly when taking a reading, to insure that residual
friction is not holding the needle back. 20 PSI on your gauge is only 2 minor
divisions and conventional pressure gauges can easily stick by that amount
especially in the lower part of its range.
	Even if everything is correct, and you are slightly low on pressure, it
sounds pretty healthy to me.
	BTW, did you happen to check your sliding clutch member for wear? My OD
worked fine when it was cold, but slipped in reverse when hot. Turns out that
is symptomatic of a worn clutch. I measured the remaining friction material,
and it was at 0.040". As new is 0.100" thick. It would seem that the OD needs
a new clutch if you are at 0.040" or less. I would check BEFORE you put it
back in the car (unlike me). Doh!

	Vance

    Vance Navarrette
    Cogito Ergo Zoom
    I think, therefore I go fast

-----Original Message-----
From: 6pack-bounces at autox.team.net [mailto:6pack-bounces at autox.team.net] On
Behalf Of Corbitt, Michael
Sent: Wednesday, January 07, 2009 2:09 PM
To: 6pack at autox.team.net
Subject: [6pack] J-Type OD - Engaged Pressure

<snip>


Nelson's article indicates I should have about 20 psi of residual
pressure in direct drive and 430-460 psi with the OD engaged.  The gauge
I'm using registers from 0 - 600 psi in 10 psi increments.  The gauge
registers very little, if any, residual pressure.  With the OD engaged,
the needle bounces between 380 to 410 psi.  I could definitely tell a
change in the speed of the input shaft when I engaged the OD, so I have
to believe it is working.  Also, according to Nelson, there must be some
residual pressure; otherwise the dashpot would not work.   Is the
engaged pressure acceptable?   Is this lower than expected pressure
(380-410) and the movement of the needle indicating a problem, such as
with the pressure relief valve?


Any input would be appreciated.


Mike

Corvallis, OR