Message text written by INTERNET:triumphs-owner@autox.team.net
>From: dncullig@us.ibm.com
>Subject: O/D changes speedo?
>
>
> 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?
><
Hello, sorry for the late reply. I am catching up.
The speedo drive on all OD and non-OD transmissions is AFTER the OD and turns
at a speedo proportional to the drive shaft speed. Your question is very good.
Nothing
else changed except the OD and now the speedo is off. WHY?
Well, maybe the speedo drive gear in the OD has a different number of teeth
than it "ought to"
(I.E. one fewer teeth).
Good question. I do not have a good answer except to say, maybe ther is more
going on here
than you think...... Could the speedo or cable be the culprit?
-Tony
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