[TR] TR4 Speedo with OD

[Randall]

> How do I verify?

Two things I would do:

1) With the cable disconnected at the speedo but connected at the OD, can
you turn the exposed end?

2) Disconnect the cable at the OD, jack up a wheel, and turn the driveline.
Look to see if the square inside the hole turns with the driveline.

> What would I need to do to fix?

If the square doesn't turn in step 2 above, I would start by removing the
locating bolt, item CS8
http://www.zeni.net/trf/TR6bluebook/index.php?page=94
then pry out the bearing and pinion, item CS7.  From there, you should be
able to assess whether replacing the pinion will do, or if the gear teeth on
the annulus are ruined.

If either gear has failed, it would be best to remove the gearbox so you or
a shop can strip and clean the overdrive.  But hopefully it will turn out to
just be the cable not engaging or something similar.  Normally the only way
the gears get damaged is if someone tries to disassemble the OD without
removing the pinion first.

Randall