Correct, the speedo drive is after all the internals of the trnasmission and
OD, and is the same as the prop shaft.
I am not positive about all the earlier TRs, but the TR4 line has 2 receptacles
for lightbulbs. One is the Highbeam indicator and goes to a little colored
plastic rhinestone on the dial face. The other receptacle is for the
illumination. I had thought that the earlier cars had at least ONE receptacle
(for the illumination). As far as I know, the all the gauges have a bulb for
-------------- Original message --------------
I understand that the OD has no bearing on this as the prop shaft maintains
constant rotation, it is the motor that changes. After I looked more closely
at the speedo (and others) I realized that my back case has two holes for
lights to fit into the speedo (not the high beam). Other 3 speedos I have seen
do not have lights, rather they rely on central dash lighting (?) and the light
comes through openings in the case. I am not sure what I have here. The other
numbers on the speedo are SN 6319/06 and then 1216 just under the odometer
where the 11XX usually is.
69 TR6 CC26160L
60 TR3A TS74461LO
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