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O/D changes speedo?

To: "INTERNET:dncullig@us.ibm.com" <dncullig@us.ibm.com>
Subject: O/D changes speedo?
From: David Massey <105671.471@compuserve.com>
Date: Wed, 10 May 2000 09:18:47 -0400
Cc: "[unknown]" <triumphs@autox.team.net> charset=ISO-8859-1
Message text written by INTERNET:dncullig@us.ibm.com
>    OK, the J-type overdrive tranny is in and it WORKS!  I took the car
down to Britfest 2000 in NJ on Saturday - 230 miles round trip with no
problems, but I do have a couple of questions:

1. With the new tranny, my speedo now reads WAY higher than it did
    before, even when the O/D is not engaged.  Before, 3000RPM in
    4th gear was 60 mph - now 3000 RPM shows 67-68 MPH (but I'm
    quite certain I'm not going that fast).  The angle drive is new,
nothing
    else was changed.  What's causing this?

2. No matter whether I let up on the gas or keep steady pressure, the
    O/D seems to lurch into gear when I hit the switch (this happens in 4th
    gear - I never tried the O/D in 3rd).  The downshifts when I turn it
off
    are real smooth, but activating the O/D almost seems to make the
    car leap.  Am I doing something wrong and/or is there an adjustment
     that can be made?

Dennis Culligan <

Congratulations on the overdrive.  In regards to the questions:

1) There is a gear in the transmission that drives the speedo cable.  There
is a bolt that secures the seal housing which holds the drive gear in
place.  You can swap this gear with the one from your old transmission.  It
appears that your transmission came from a different car (perhaps a PI car
which has a different rear axle ratio) and hence has a different gear.

2) This is typical.  To avoid it you can depress the clutch while engaging
the overdrive.

Dave (J type for 10 years now)

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